diff --git a/version0.4/ebnf.cpp b/version0.4/ebnf.cpp
new file mode 100644
index 0000000..d3f5a12
--- /dev/null
+++ b/version0.4/ebnf.cpp
@@ -0,0 +1 @@
+
diff --git a/version0.4/nasal.h b/version0.4/nasal.h
new file mode 100644
index 0000000..33228c7
--- /dev/null
+++ b/version0.4/nasal.h
@@ -0,0 +1,36 @@
+#ifndef __NASAL_H__
+#define __NASAL_H__
+
+#include <iostream>
+#include <fstream>
+#include <cstdlib>
+#include <cstring>
+#include <thread>
+#include <ctime>
+#include <cmath>
+#include <stack>
+
+namespace nasal
+{
+#include "nasal_functional.h"
+
+#include "nasal_var.h"
+#include "nasal_list.h"
+#include "nasal_hash.h"
+#include "nasal_token.h"
+#include "nasal_func.h"
+
+#include "nasal_var.cpp"
+#include "nasal_list.cpp"
+#include "nasal_hash.cpp"
+#include "nasal_print.h"
+#include "nasal_var_stack.h"
+#include "nasal_func_stack.h"
+#include "nasal_token.cpp"
+#include "nasal_func.cpp"
+
+#include "nasal_lexer.h"
+#include "nasal_parse.h"
+}
+
+#endif
diff --git a/version0.4/nasal_func.cpp b/version0.4/nasal_func.cpp
new file mode 100644
index 0000000..fa8de63
--- /dev/null
+++ b/version0.4/nasal_func.cpp
@@ -0,0 +1,174 @@
+#ifndef __NASAL_FUNC_CPP__
+#define __NASAL_FUNC_CPP__
+
+#include "nasal_func.h"
+
+func::func()
+{
+	statement_head=new token_unit;
+	statement_head->line=0;
+	statement_head->type=FUNC_BEGIN;
+	statement_head->content="__func_begin";
+	statement_head->next=NULL;
+	
+	parameter_head=new parameter;
+	parameter_head->param_var.type=VAR_NONE;
+	parameter_head->param_var.data=NULL;
+	parameter_head->var_name="__null_var";
+	parameter_head->next=NULL;
+}
+func::func(const func& temp)
+{
+	token_unit *statement_temp=statement_head;
+	token_unit *temp_state=temp.statement_head;
+	parameter *parameter_temp=parameter_head;
+	parameter *temp_param=temp.parameter_head;
+	while(temp_state->next)
+	{
+		temp_state=temp_state->next;
+		statement_temp->next=new token_unit;
+		statement_temp=statement_temp->next;
+		statement_temp->line=temp_state->line;
+		statement_temp->content=temp_state->content;
+		statement_temp->type=temp_state->type;
+		statement_temp->next=NULL;
+	}
+	while(temp_param->next)
+	{
+		temp_param=temp_param->next;
+		parameter_temp->next=new parameter;
+		parameter_temp=parameter_temp->next;
+		parameter_temp->param_var=temp_param->param_var;
+		parameter_temp->var_name=temp_param->var_name;
+		parameter_temp->next=NULL;
+	}
+}
+func::~func()
+{
+	token_unit *statement_temp=statement_head;
+	token_unit *statement_last_unit=NULL;
+	parameter *parameter_temp=parameter_head;
+	parameter *parameter_last_unit=NULL;
+	
+	while(statement_temp->next)
+	{
+		statement_last_unit=statement_temp;
+		statement_temp=statement_temp->next;
+		delete statement_last_unit;
+	}
+	delete statement_temp;
+	while(parameter_temp->next)
+	{
+		parameter_last_unit=parameter_temp;
+		parameter_temp=parameter_temp->next;
+		delete parameter_last_unit;
+	}
+	delete parameter_temp;
+}
+func& func::operator=(const func& temp)
+{
+	token_unit *statement_temp=statement_head->next;
+	token_unit *temp_state=temp.statement_head;
+	parameter *parameter_temp=parameter_head->next;
+	parameter *temp_param=temp.parameter_head;
+	
+	token_unit *statement_last=NULL;
+	parameter *parameter_last=NULL;
+	if(statement_temp)
+	{
+		while(statement_temp->next)
+		{
+			statement_last=statement_temp;
+			statement_temp=statement_temp->next;
+			delete statement_last;
+		}
+		delete statement_temp;
+	}
+	if(parameter_temp)
+	{
+		while(parameter_temp->next)
+		{
+			parameter_last=parameter_temp;
+			parameter_temp=parameter_temp->next;
+			delete parameter_last;
+		}
+		delete parameter_temp;
+	}
+	statement_head->next=NULL;
+	parameter_head->next=NULL;
+	statement_temp=statement_head;
+	parameter_temp=parameter_head;
+	while(temp_state->next)
+	{
+		temp_state=temp_state->next;
+		statement_temp->next=new token_unit;
+		statement_temp=statement_temp->next;
+		statement_temp->line=temp_state->line;
+		statement_temp->content=temp_state->content;
+		statement_temp->type=temp_state->type;
+		statement_temp->next=NULL;
+	}
+	while(temp_param->next)
+	{
+		temp_param=temp_param->next;
+		parameter_temp->next=new parameter;
+		parameter_temp=parameter_temp->next;
+		parameter_temp->param_var=temp_param->param_var;
+		parameter_temp->var_name=temp_param->var_name;
+		parameter_temp->next=NULL;
+	}
+	return *this;
+}
+void func::append_var(std::string& varia_name,var& p)
+{
+	parameter *parameter_temp=parameter_head;
+	while(parameter_temp->next)
+	{
+		parameter_temp=parameter_temp->next;
+		if(parameter_temp->var_name==varia_name)
+		{
+			std::cout<<"[Error] Redefinition of var \""<<varia_name<<"\" ."<<std::endl;
+			return;
+		}
+	}
+	parameter_temp->next=new parameter;
+	parameter_temp=parameter_temp->next;
+	parameter_temp->param_var=p;
+	parameter_temp->var_name=varia_name;
+	parameter_temp->next=NULL;
+	return;
+}
+void func::append_token(const int _line,const int _type,std::string &_content)
+{
+	token_unit *statement_temp=statement_head;
+	while(statement_temp->next)
+		statement_temp=statement_temp->next;
+	statement_temp->next=new token_unit;
+	statement_temp=statement_temp->next;
+	statement_temp->line=_line;
+	statement_temp->type=_type;
+	statement_temp->content=_content;
+	statement_temp->next=NULL;
+	return;
+}
+void func::print_info()
+{
+	parameter *para_temp=parameter_head;
+	token_unit *token_temp=statement_head;
+	std::cout<<"\n\t[parameter] :";
+	while(para_temp->next)
+	{
+		para_temp=para_temp->next;
+		std::cout<<para_temp->var_name<<" ";
+	}
+	std::cout<<"\n\t[statement] :";
+	while(token_temp->next)
+	{
+		token_temp=token_temp->next;
+		std::cout<<token_temp->content<<" ";
+	}
+	std::cout<<std::endl;
+	return;
+}
+
+#endif
diff --git a/version0.4/nasal_func.h b/version0.4/nasal_func.h
new file mode 100644
index 0000000..09dd9ec
--- /dev/null
+++ b/version0.4/nasal_func.h
@@ -0,0 +1,36 @@
+#ifndef __NASAL_FUNC_H__
+#define __NASAL_FUNC_H__
+
+#include "nasal_token.h"
+
+//for function
+#define FUNC_BEGIN       0
+#define FUNC_OPERATOR    1
+#define FUNC_IDENTIFIER  2
+#define FUNC_NUMBER      3
+#define FUNC_RESERVEWORD 4
+#define FUNC_STRING      5
+
+struct parameter
+{
+	std::string var_name;
+	var param_var;
+	parameter *next;
+};
+
+class func
+{
+	private:
+		token_unit *statement_head;
+		parameter *parameter_head;
+	public:
+		func();
+		func(const func&);
+		~func();
+		func& operator=(const func&);
+		void append_var(std::string&,var&);
+		void append_token(const int,const int,std::string &);
+		void print_info();
+};
+
+#endif
diff --git a/version0.4/nasal_func_stack.h b/version0.4/nasal_func_stack.h
new file mode 100644
index 0000000..97450b6
--- /dev/null
+++ b/version0.4/nasal_func_stack.h
@@ -0,0 +1,116 @@
+#ifndef __NASAL_FUNC_STACK_H__
+#define __NASAL_FUNC_STACK_H__
+
+#include "nasal_token.h"
+#include "nasal_func.h"
+
+
+struct func_stack_unit
+{
+	std::string func_name;
+	func func_statement;
+	func_stack_unit *next;
+};
+
+class func_stack
+{
+	private:
+		func_stack_unit *head;
+	public:
+		func_stack()
+		{
+			head=new func_stack_unit;
+			head->func_name="null";
+			head->next=NULL;
+		}
+		~func_stack()
+		{
+			func_stack_unit *temp=head;
+			func_stack_unit *this_node=NULL;
+			while(temp->next)
+			{
+				this_node=temp;
+				temp=temp->next;
+				delete this_node;
+			}
+			delete temp;
+		}
+		void append_function(std::string &function_name,func &temp_func)
+		{
+			func_stack_unit *temp=head;
+			while(temp->next)
+			{
+				temp=temp->next;
+				if(temp->func_name==function_name)
+				{
+					std::cout<<"[Error] Redeclaration of function \""<<function_name<<"\""<<std::endl;
+					return;
+				}
+			}
+			temp->next=new func_stack_unit;
+			temp=temp->next;
+			temp->next=NULL;
+			temp->func_name=function_name;
+			temp->func_statement=temp_func;
+			return;
+		}
+//		void run_function(std::string &function_name)
+//		{
+//			func_stack_unit *temp=head;
+//			while(temp->next)
+//			{
+//				temp=temp->next;
+//				if(temp->func_name==function_name)
+//				{
+//					temp->func_statement.run();
+//					return;
+//				}
+//			}
+//			std::cout<<"[Error] Could not find this function."<<std::endl;
+//			return;
+//		}
+		void print_function()
+		{
+			func_stack_unit *temp=head;
+			while(temp->next)
+			{
+				temp=temp->next;
+				std::cout<<"function: "<<temp->func_name;
+				temp->func_statement.print_info();
+			}
+			return;
+		}
+		void pop_function()
+		{
+			func_stack_unit *temp=head;
+			func_stack_unit *end_temp;
+			if(!head->next)
+				return;
+			while(temp->next)
+			{
+				end_temp=temp;
+				temp=temp->next;
+			}
+			end_temp->next=NULL;
+			delete temp;
+		}
+		void delete_all()
+		{
+			func_stack_unit *temp=head->next;
+			func_stack_unit *this_node=NULL;
+			head->next=NULL;
+			if(!temp)
+				return;
+			while(temp->next)
+			{
+				this_node=temp;
+				temp=temp->next;
+				delete this_node;
+			}
+			delete temp;
+			return;
+		}
+};
+func_stack nasal_func_stack;
+
+#endif
diff --git a/version0.4/nasal_functional.h b/version0.4/nasal_functional.h
new file mode 100644
index 0000000..9ec8d1d
--- /dev/null
+++ b/version0.4/nasal_functional.h
@@ -0,0 +1,59 @@
+#ifndef __NASAL_FUNCTIONAL_H__
+#define __NASAL_FUNCTIONAL_H__
+
+bool is_float(std::string &str)
+{
+	for(int i=0;i<(int)str.length();++i)
+		if(str[i]=='.')
+			return true;
+	return false;
+}
+long long int int_str2num(std::string &str)
+{
+	for(int i=0;i<(int)str.length();++i)
+		if(!(('0'<=str[i]) && (str[i]<='9') || (str[i]=='.')))
+		{
+			std::cout<<"[Error] Non-numeric string."<<std::endl;
+			return 0;
+		}
+	long long int num=0;
+	long long int acc=1;
+	for(int i=(int)str.length()-1;i>=0;--i)
+	{
+		num+=acc*((long long int)(str[i]-'0'));
+		acc*=10;
+	}
+	return num;
+}
+double double_str2num(std::string &str)
+{
+	for(int i=0;i<(int)str.length();++i)
+		if(!(('0'<=str[i]) && (str[i]<='9') || (str[i]=='.')))
+		{
+			std::cout<<"[Error] Non-numeric string."<<std::endl;
+			return 0;
+		}
+	int DotPlace=0;
+	for(int i=0;i<(int)str.length();++i)
+		if(str[i]=='.')
+		{
+			DotPlace=i;
+			break;
+		}
+	double num=0;
+	double acc=1;
+	double aff=0.1;
+	for(int i=DotPlace+1;i<(int)str.length();++i)
+	{
+		num+=aff*((double)(str[i]-'0'));
+		aff*=0.1;
+	}
+	for(int i=DotPlace-1;i>=0;--i)
+	{
+		num+=acc*((double)(str[i]-'0'));
+		acc*=10;
+	}
+	return num;
+}
+
+#endif
diff --git a/version0.4/nasal_hash.cpp b/version0.4/nasal_hash.cpp
new file mode 100644
index 0000000..7eb376b
--- /dev/null
+++ b/version0.4/nasal_hash.cpp
@@ -0,0 +1,113 @@
+#ifndef __NASAL_HASH_CPP__
+#define __NASAL_HASH_CPP__
+
+
+#include "nasal_hash.h"
+
+nasal_hash::nasal_hash()
+{
+	head=new nasal_hash_unit;
+	head->name="";
+	head->hash_var.type=VAR_NONE;
+	head->hash_var.data=NULL;
+	head->next=NULL;
+}
+nasal_hash::~nasal_hash()
+{
+	nasal_hash_unit *temp=head;
+	nasal_hash_unit *this_node=NULL;
+	while(temp->next)
+	{
+		this_node=temp;
+		temp=temp->next;
+		delete this_node;
+	}
+	delete temp;
+}
+nasal_hash& nasal_hash::operator=(const nasal_hash &p)
+{
+	nasal_hash_unit *temp=head;
+	nasal_hash_unit *this_node=NULL;
+	if(head->next)
+	{
+		temp=temp->next;
+		head->next=NULL;
+		while(temp->next)
+		{
+			this_node=temp;
+			temp=temp->next;
+			delete this_node;
+		}
+		delete temp;
+	}
+	temp=head;
+	nasal_hash_unit *temp_p=p.head;
+	
+	while(temp_p->next)
+	{
+		temp_p=temp_p->next;
+		temp->next=new nasal_hash_unit;
+		temp=temp->next;
+		temp->next=NULL;
+		temp->hash_var=temp_p->hash_var;
+		temp->name=temp_p->name;
+	}
+	return *this;
+}
+void nasal_hash::append(std::string& var_name,var& p)
+{
+	nasal_hash_unit *temp=head;
+	while(temp->next)
+		temp=temp->next;
+	temp->next=new nasal_hash_unit;
+	temp=temp->next;
+	temp->next=NULL;
+	temp->hash_var=p;
+	temp->name=var_name;
+	return;
+}
+int nasal_hash::contains(std::string& var_name)
+{
+	nasal_hash_unit *temp=head;
+	while(temp->next)
+	{
+		temp=temp->next;
+		if(temp->name==var_name)
+			return 1;
+	}
+	return 0;
+}
+int nasal_hash::delete_element(std::string& var_name)
+{
+	nasal_hash_unit *temp=head;
+	nasal_hash_unit *last_node=NULL;
+	while(temp->next)
+	{
+		last_node=temp;
+		temp=temp->next;
+		if(temp->name==var_name)
+		{
+			last_node->next=temp->next;
+			delete temp;
+			return 1;
+		}
+	}
+	return 0;
+}
+nasal_list nasal_hash::keys()
+{
+	var assist_var;
+	assist_var.type=VAR_STRING;
+	nasal_list temp_list;
+	nasal_hash_unit *temp=head;
+	while(temp->next)
+	{
+		temp=temp->next;
+		assist_var.data=new std::string;
+		*((std::string *)assist_var.data)=temp->name;
+		temp_list.append(assist_var);
+	}
+	return temp_list;
+}
+
+#endif
diff --git a/version0.4/nasal_hash.h b/version0.4/nasal_hash.h
new file mode 100644
index 0000000..b28f4d4
--- /dev/null
+++ b/version0.4/nasal_hash.h
@@ -0,0 +1,27 @@
+#ifndef __NASAL_HASH_H__
+#define __NASAL_HASH_H__
+
+#include "nasal_var.h"
+
+struct nasal_hash_unit
+{
+	std::string name;
+	var hash_var;
+	nasal_hash_unit *next;
+};
+
+class nasal_hash
+{
+	private:
+		nasal_hash_unit *head;
+	public:
+		nasal_hash();
+		~nasal_hash();
+		nasal_hash& operator=(const nasal_hash&);
+		void append(std::string&,var&);
+		int contains(std::string&);
+		int delete_element(std::string&);
+		nasal_list keys();
+};
+
+#endif
diff --git a/version0.4/nasal_interpreter.cpp b/version0.4/nasal_interpreter.cpp
new file mode 100644
index 0000000..021ef0a
--- /dev/null
+++ b/version0.4/nasal_interpreter.cpp
@@ -0,0 +1,54 @@
+#include "nasal.h"
+
+int main()
+{
+	std::string command;
+	std::cout<<">> nasal-- script by ValKmjolnir"<<std::endl;
+	std::cout<<">> input \"help\" to find help."<<std::endl;
+	while(1)
+	{
+		std::cout<<">> ";
+		std::getline(std::cin,command);
+		if(command=="help")
+		{
+			std::cout<<">> nasal-- script by ValKmjolnir"<<std::endl;
+			std::cout<<">> 1. input file name to run the lexer."<<std::endl;
+			std::cout<<">> 2. command \"cls\" to clear the screen."<<std::endl;
+			std::cout<<">> 3. command \"exit\" to shut down the program."<<std::endl;
+			std::cout<<">> 4. command \"lexer\" to see tokens in stack."<<std::endl;
+			std::cout<<">> 5. command \"parser\" to run parser."<<std::endl;
+			std::cout<<">> 6. command \"del\" to delete all elements in stack."<<std::endl;
+			std::cout<<">> 7. command \"run\" to run the programme in stack."<<std::endl;
+			std::cout<<">> 8. command \"rs\" to check the source program."<<std::endl;
+		}
+		else if(command=="cls")
+		{
+			system("cls");
+			//linux system("clear");
+			//macOS system("clear");
+		}
+		else if(command=="rs")
+			nasal::PrintSourceFile();
+		else if(command=="exit")
+		{
+			break;
+		}
+		else if(command=="lexer")
+			nasal::nasal_lexer.print();
+		else if(command=="del")
+		{
+			nasal::nasal_lexer.delete_all();
+			nasal::nasal_parse.stack_set_empty();
+			nasal::nasal_var_stack.delete_all();
+			nasal::nasal_func_stack.delete_all();
+		}
+		else if(command=="parser" || command=="run")
+		{
+			nasal::nasal_parse.parse_work(nasal::nasal_lexer);
+			//nasal::nasal_parse.print_stack();
+		}	
+		else
+			nasal::RunProcess(command);
+	}
+	return 0;
+}
diff --git a/version0.4/nasal_lexer.h b/version0.4/nasal_lexer.h
new file mode 100644
index 0000000..167ac1b
--- /dev/null
+++ b/version0.4/nasal_lexer.h
@@ -0,0 +1,270 @@
+#ifndef __NASAL_LEXER_H__
+#define __NASAL_LEXER_H__
+
+#include "nasal_functional.h"
+
+#define FAIL        -1 //失败 
+#define SCANEND     -2 //扫描完成 
+#define ERRORFOUND  -3 //异常错误 
+
+std::string ReserveWord[26]=
+{
+	"for","foreach","forindex","while",
+	"var","func","break","continue","return",
+	"if","else","elsif","nil","and","or",
+	"print","cmp","append","setsize","subvec","pop",
+	"sort","contains","delete","keys","typeof"
+};
+
+std::string OperatorOrDelimiter[40]=
+{
+	"+","-","*","/","=","+=","-=","*=","/=",
+	"\n","\t","\r","\\","\'","\"",".",
+	"<","<=",">",">=","==","!=","~=","!","~",
+	",",";","(",")","[","]","{","}","#","?",":",
+	"&","|","%","^"
+};
+
+std::string IdentifierTable[1000]={""};
+char ResourceProgram[16777216];
+
+int isReserveWord(std::string &p)
+{
+	for(int i=0;i<26;++i)
+		if(ReserveWord[i]==p)
+			return i+1;
+	return FAIL;
+}
+
+int isOperatorOrDelimiter(std::string &p)
+{
+	for(int i=0;i<40;++i)
+		if(OperatorOrDelimiter[i]==p)
+			return i+1;
+	return FAIL;
+}
+
+bool isLetter(char t)
+{
+	return (('a'<=t) && (t<='z') || ('A'<=t) && (t<='Z'));
+}
+
+bool isNumber(char t)
+{
+	return (('0'<=t) && (t<='9'));
+}
+
+void InputFile(std::string &FileName)
+{
+	std::ifstream fin(FileName);
+	int i=0;
+	bool FindNote=false;
+	while(!fin.eof())
+	{
+		ResourceProgram[i]=fin.get();
+		if(ResourceProgram[i]=='\n')
+			FindNote=false;
+		if(ResourceProgram[i]!='#' && !FindNote)
+			++i;
+		else if(ResourceProgram[i]=='#')
+		{
+			FindNote=true;
+		}
+		if(fin.eof())
+			break;
+	}
+	ResourceProgram[i]=0;
+
+	fin.close();
+	return;
+}
+
+void PrintSourceFile()
+{
+	int line=1;
+	std::cout<<line<<"	";
+	for(int i=0;i<16777216;++i)
+	{
+		if(!ResourceProgram[i])
+			break;
+		std::cout<<ResourceProgram[i];
+		if(ResourceProgram[i]=='\n')
+		{
+			++line;
+			std::cout<<line<<"	";
+		}
+	}
+	std::cout<<std::endl;
+}
+
+void Scanner(int &Syn,const char Source[],std::string &token,int &ptr,int &line)
+{
+	char temp;
+	temp=Source[ptr];
+	while(temp==' ' || temp=='\n' || temp=='\t' || temp=='\r' || temp<0 || temp>127)
+	{
+		++ptr;
+		if(temp=='\n')
+			++line;
+		temp=Source[ptr];
+	}
+	
+	token="";
+	if(isLetter(temp) || temp=='_')
+	{
+		token+=temp;
+		++ptr;
+		temp=Source[ptr];
+		while(isLetter(temp) || isNumber(temp) || temp=='_')
+		{
+			token+=temp;
+			++ptr;
+			temp=Source[ptr];
+		}
+		Syn=isReserveWord(token);
+		if(Syn==FAIL)
+			Syn=IDENTIFIER;
+		else
+			Syn=RESERVEWORD;
+	}
+	else if(isNumber(temp))
+	{
+		int PointCnt=0;
+		while(isNumber(temp))
+		{
+			token+=temp;
+			++ptr;
+			temp=Source[ptr];
+			if(temp=='.' && !PointCnt)
+			{
+				++PointCnt;
+				token+=temp;
+				++ptr;
+				temp=Source[ptr];
+			}
+		}
+		Syn=NUMBER;
+	}
+	else if(temp=='(' || temp==')' || temp=='[' || temp==']' || temp=='{' ||
+			temp=='}' || temp==',' || temp==';' || temp=='|' || temp==':' ||
+			temp=='?' || temp=='.' || temp=='`' || temp=='\'' || temp=='&'||
+			temp=='%' || temp=='$' || temp=='^')
+	{
+		token+=temp;
+		++ptr;
+		Syn=OPERATOR;
+	}
+	else if(temp=='=' || temp=='+' || temp=='-' || temp=='*' || temp=='!' || temp=='/' || temp=='<' || temp=='>' || temp=='~')
+	{
+		Syn=OPERATOR;
+		token+=temp;
+		++ptr;
+		temp=Source[ptr];
+		if(temp=='=')
+		{
+			token+=temp;
+			++ptr;
+		}
+	}
+	else if(temp=='\\')
+	{
+		Syn=OPERATOR;
+		token+=temp;
+		++ptr;
+		temp=Source[ptr];
+		if(temp=='=' || temp=='n' || temp=='t' || temp=='r' || temp=='\\' || temp=='\'' || temp=='\"')
+		{
+			token+=temp;
+			++ptr;
+		}
+	}
+	else if(temp=='\"')
+	{
+		Syn=STRING;
+		token+=temp;
+		++ptr;
+		temp=Source[ptr];
+		while(temp!='\"')
+		{
+			if(temp=='\\')
+			{
+				token+=temp;
+				
+				++ptr;
+				temp=Source[ptr];
+				token+=temp;
+				
+				++ptr;
+				temp=Source[ptr];
+			}
+			else
+			{
+				token+=temp;
+				++ptr;
+				temp=Source[ptr];
+			}
+			if(temp==0 || temp=='\n')
+				break;
+		}
+		//add the last char \"
+		if(temp=='\"')
+		{
+			token+=temp;
+			++ptr;
+		}
+		else
+			token+=" __missing_end_of_string";
+	}
+	else if(temp==0)
+	{
+		Syn=SCANEND;
+		return;
+	}
+	else
+	{
+		Syn=FAIL;
+		std::cout<<"[Error] Unexpected error occurred: "<<temp<<std::endl;
+		system("pause");
+		++ptr;
+		return;
+	}
+	if(token=="")
+	{
+		Syn=ERRORFOUND;
+		std::cout<<"[Error] Cannot identify "<<std::endl;
+	}
+	return;
+}
+
+void RunProcess(std::string &FileName)
+{
+	int Syn=0;//token type
+	int Ptr=0;//pointer to one char in ResourcePrograme
+	int line=1;
+	std::string token;
+	std::ifstream fin(FileName);
+	if(fin.fail())
+	{
+		std::cout<<"[Error] Failed to load file: "<<FileName<<std::endl;
+		fin.close();
+		return;
+	}
+	else
+		fin.close();
+	ResourceProgram[0]=0;
+	nasal_lexer.delete_all();
+	nasal_var_stack.delete_all();
+	nasal_func_stack.delete_all();
+	InputFile(FileName);
+	while(Syn!=SCANEND && Syn!=ERRORFOUND)
+	{
+		Scanner(Syn,ResourceProgram,token,Ptr,line);
+		if(Syn>0)//all Syn type is larger than zero
+			nasal_lexer.append(line,Syn,token);
+	}
+	//nasal_lexer.print(); //for debug mode
+	std::cout<<">> Complete scanning \""<<FileName<<"\"."<<std::endl;
+	return;
+}
+
+#endif
diff --git a/version0.4/nasal_list.cpp b/version0.4/nasal_list.cpp
new file mode 100644
index 0000000..259f951
--- /dev/null
+++ b/version0.4/nasal_list.cpp
@@ -0,0 +1,300 @@
+#ifndef __NASAL_LIST_CPP__
+#define __NASAL_LIST_CPP__
+
+#include "nasal_var.h"
+#include "nasal_list.h"
+
+nasal_list::nasal_list()
+{
+	head=new nasal_list_unit;
+	head->list_var.type=VAR_NONE;
+	head->list_var.data=NULL;
+	head->next=NULL;
+}
+nasal_list::~nasal_list()
+{
+	nasal_list_unit *temp=head;
+	nasal_list_unit *this_node=NULL;
+	while(temp->next)
+	{
+		this_node=temp;
+		temp=temp->next;
+		delete this_node;
+	}
+	delete temp;
+}
+nasal_list& nasal_list::operator=(const nasal_list &p)
+{
+	nasal_list_unit *temp=head;
+	nasal_list_unit *this_node=NULL;
+	if(head->next)
+	{
+		temp=temp->next;
+		head->next=NULL;
+		while(temp->next)
+		{
+			this_node=temp;
+			temp=temp->next;
+			delete this_node;
+		}
+		delete temp;
+	}
+	temp=head;
+	nasal_list_unit *temp_p=p.head;
+	
+	while(temp_p->next)
+	{
+		temp_p=temp_p->next;
+		temp->next=new nasal_list_unit;
+		temp=temp->next;
+		temp->next=NULL;
+		temp->list_var=temp_p->list_var;
+	}
+	return *this;
+}
+void nasal_list::append(var& p)
+{
+	nasal_list_unit *temp=head;
+	while(temp->next)
+		temp=temp->next;
+	temp->next=new nasal_list_unit;
+	temp=temp->next;
+	temp->next=NULL;
+	temp->list_var=p;
+	return;
+}
+void nasal_list::setsize(const int list_size)
+{
+	nasal_list_unit *temp=head;
+	int cnt=0;
+	while(temp->next)
+	{
+		temp=temp->next;
+		++cnt;
+		if(cnt==list_size)
+		{
+			nasal_list_unit *this_node=NULL;
+			nasal_list_unit *t=temp->next;
+			temp->next=NULL;
+			if(!t)
+				return;
+			while(t->next)
+			{
+				this_node=t;
+				t=t->next;
+				delete this_node;
+			}
+			delete t;
+			return;
+		}
+	}
+	while(cnt<list_size)
+	{
+		temp->next=new nasal_list_unit;
+		temp=temp->next;
+		temp->list_var.type=VAR_NONE;
+		temp->list_var.data=NULL;
+		temp->next=NULL;
+		++cnt;
+	}
+	return;
+}
+nasal_list nasal_list::subvec(const int list_begin=0,const int list_end=-1)
+{
+	nasal_list temp_list;
+	int cnt=-1;
+	nasal_list_unit *temp=head;
+	
+	int beg=list_begin;
+	int end=list_end;
+	if(list_end==-1)
+	{
+		int end_place=-1;
+		while(temp->next)
+		{
+			temp=temp->next;
+			++end_place;
+		}
+		temp=head;
+		end=end_place;
+	}
+	while(temp->next)
+	{
+		temp=temp->next;
+		++cnt;
+		if(beg<=cnt && cnt<=end)
+			temp_list.append(temp->list_var);
+	}
+	return temp_list;
+}
+var nasal_list::pop()
+{
+	nasal_list_unit *temp=head;
+	nasal_list_unit *this_node;
+	while(temp->next)
+	{
+		this_node=temp;
+		temp=temp->next;
+	}
+	this_node->next=NULL;
+	var temp_var=temp->list_var;
+	delete temp;
+	return temp_var;
+}
+nasal_list nasal_list::sort_list(const int sort_type,const int _cmp=1)
+{
+	nasal_list temp_list;
+	if(sort_type==SORT_INT)
+	{
+		nasal_list_unit *temp=head;
+		while(temp->next)
+		{
+			temp=temp->next;
+			if(temp->list_var.type!=VAR_LLINT)
+			{
+				std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be long int."<<std::endl;
+				temp_list.setsize(1);
+				return temp_list;
+			}
+		}
+		if(temp->list_var.type!=VAR_LLINT)
+		{
+			std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be long int."<<std::endl;
+			temp_list.setsize(1);
+			return temp_list;
+		}
+		temp_list=*this;
+		nasal_list_unit *first_temp_this;
+		nasal_list_unit *second_temp_this;
+		nasal_list_unit *node_this;
+		first_temp_this=temp_list.head->next;
+		while(first_temp_this->next)
+		{
+			node_this=first_temp_this;
+			second_temp_this=first_temp_this->next;
+			while(second_temp_this->next)
+			{
+				if(_cmp>0 && *((int *)node_this->list_var.data)>*((int *)second_temp_this->list_var.data))//from small to large
+					node_this=second_temp_this;
+				else if(_cmp<=0 && *((int *)node_this->list_var.data)<*((int *)second_temp_this->list_var.data))//from large to small
+					node_this=second_temp_this;
+				second_temp_this=second_temp_this->next;
+			}
+			if(_cmp>0 && *((int *)node_this->list_var.data)>*((int *)second_temp_this->list_var.data))//from small to large func(a,b) a-b
+				node_this=second_temp_this;
+			else if(_cmp<=0 && *((int *)node_this->list_var.data)<*((int *)second_temp_this->list_var.data))//from large to small func(a,b) b-a
+				node_this=second_temp_this;
+			if(node_this!=first_temp_this)
+			{
+				int t;
+				t=*((int *)first_temp_this->list_var.data);
+				*((int *)first_temp_this->list_var.data)=*((int *)node_this->list_var.data);
+				*((int *)node_this->list_var.data)=t;
+			}
+			first_temp_this=first_temp_this->next;
+		}
+	}
+	else if(sort_type==SORT_DBL)
+	{
+		nasal_list_unit *temp=head;
+		while(temp->next)
+		{
+			temp=temp->next;
+			if(temp->list_var.type!=VAR_DOUBLE)
+			{
+				std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be float."<<std::endl;
+				temp_list.setsize(1);
+				return temp_list;
+			}
+		}
+		if(temp->list_var.type!=VAR_DOUBLE)
+		{
+			std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be float."<<std::endl;
+			temp_list.setsize(1);
+			return temp_list;
+		}
+		temp_list=*this;
+		nasal_list_unit *first_temp_this;
+		nasal_list_unit *second_temp_this;
+		nasal_list_unit *node_this;
+		first_temp_this=temp_list.head->next;
+		while(first_temp_this->next)
+		{
+			node_this=first_temp_this;
+			second_temp_this=first_temp_this->next;
+			while(second_temp_this->next)
+			{
+				if(_cmp>0 && *((double *)node_this->list_var.data)>*((double *)second_temp_this->list_var.data))//from small to large
+					node_this=second_temp_this;
+				else if(_cmp<=0 && *((double *)node_this->list_var.data)<*((double *)second_temp_this->list_var.data))//from large to small
+					node_this=second_temp_this;
+				second_temp_this=second_temp_this->next;
+			}
+			if(_cmp>0 && *((double *)node_this->list_var.data)>*((double *)second_temp_this->list_var.data))//from small to large func(a,b) a-b
+				node_this=second_temp_this;
+			else if(_cmp<=0 && *((double *)node_this->list_var.data)<*((double *)second_temp_this->list_var.data))//from large to small func(a,b) b-a
+				node_this=second_temp_this;
+			if(node_this!=first_temp_this)
+			{
+				double t;
+				t=*((double *)first_temp_this->list_var.data);
+				*((double *)first_temp_this->list_var.data)=*((double *)node_this->list_var.data);
+				*((double *)node_this->list_var.data)=t;
+			}
+			first_temp_this=first_temp_this->next;
+		}
+	}
+	else if(sort_type==SORT_STR)
+	{
+		nasal_list_unit *temp=head;
+		while(temp->next)
+		{
+			temp=temp->next;
+			if(temp->list_var.type!=VAR_STRING)
+			{
+				std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be string."<<std::endl;
+				temp_list.setsize(1);
+				return temp_list;
+			}
+		}
+		if(temp->list_var.type!=VAR_STRING)
+		{
+			std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be string."<<std::endl;
+			temp_list.setsize(1);
+			return temp_list;
+		}
+		temp_list=*this;
+		nasal_list_unit *first_temp_this;
+		nasal_list_unit *second_temp_this;
+		nasal_list_unit *node_this;
+		first_temp_this=temp_list.head->next;
+		while(first_temp_this->next)
+		{
+			node_this=first_temp_this;
+			second_temp_this=first_temp_this->next;
+			while(second_temp_this->next)
+			{
+				if(_cmp>0 && *((std::string *)node_this->list_var.data)>*((std::string *)second_temp_this->list_var.data))//from small to large
+					node_this=second_temp_this;
+				else if(_cmp<=0 && *((std::string *)node_this->list_var.data)<*((std::string *)second_temp_this->list_var.data))//from large to small
+					node_this=second_temp_this;
+				second_temp_this=second_temp_this->next;
+			}
+			if(_cmp>0 && *((std::string *)node_this->list_var.data)>*((std::string *)second_temp_this->list_var.data))//from small to large func(a,b) cmp(a,b)
+				node_this=second_temp_this;
+			else if(_cmp<=0 && *((std::string *)node_this->list_var.data)<*((std::string *)second_temp_this->list_var.data))//from large to small func(a,b) cmp(b,a) or -cmp(a,b)
+				node_this=second_temp_this;
+			if(node_this!=first_temp_this)
+			{
+				std::string t;
+				t=*((std::string *)first_temp_this->list_var.data);
+				*((std::string *)first_temp_this->list_var.data)=*((std::string *)node_this->list_var.data);
+				*((std::string *)node_this->list_var.data)=t;
+			}
+			first_temp_this=first_temp_this->next;
+		}
+	}
+	return temp_list;
+}
+
+#endif
diff --git a/version0.4/nasal_list.h b/version0.4/nasal_list.h
new file mode 100644
index 0000000..11946eb
--- /dev/null
+++ b/version0.4/nasal_list.h
@@ -0,0 +1,33 @@
+#ifndef __NASAL_LIST_H__
+#define __NASAL_LIST_H__
+
+#include "nasal_var.h"
+
+#define SORT_INT 1
+#define SORT_DBL 2
+#define SORT_STR 3
+
+class nasal_hash;
+
+struct nasal_list_unit
+{
+	var list_var;
+	nasal_list_unit *next;
+};
+
+class nasal_list
+{
+	private:
+		nasal_list_unit *head;
+	public:
+		nasal_list();
+		~nasal_list();
+		nasal_list& operator=(const nasal_list&);
+		void append(var&);
+		void setsize(const int);
+		nasal_list subvec(const int,const int);
+		var pop();
+		nasal_list sort_list(const int,const int);
+};
+
+#endif
diff --git a/version0.4/nasal_parse.h b/version0.4/nasal_parse.h
new file mode 100644
index 0000000..ac0315e
--- /dev/null
+++ b/version0.4/nasal_parse.h
@@ -0,0 +1,818 @@
+#ifndef __NASAL_PARSE_H__
+#define __NASAL_PARSE_H__
+#include "nasal_lexer.h"
+#include "nasal_token.h"
+
+enum token_type
+{
+	__stack_end,
+	__equal,// =
+	__add_operator,__sub_operator,__mul_operator,__div_operator,__link_operator,// + - * / ~
+	__add_equal,__sub_equal,__mul_equal,__div_equal,__link_equal,// += -= *= /= ~=
+	__left_brace,__right_brace,// {}
+	__left_bracket,__right_bracket,// []
+	__left_curve,__right_curve,// ()
+	__semi,// ;
+	__comma,// ,
+	__colon,// :
+	__dot,// .
+	__var,// var reserve word
+	__func,// func reserve word
+	__print,// print reserve word
+	__identifier,__identifiers,
+	__scalar,__scalars,
+	__hash_member,__hash_members,
+	__array_search,__hash_search,
+	__statement,__statements,
+	__function,//function(){}
+	__use_function,__class_function,
+	__definition,__assignment,
+	__print_function,// print()
+	__loop,__loop_continue,__loop_break,// for()while() continue; break;
+	__choose,// if else if else
+	__return,__func_return
+};
+
+struct parse_unit
+{
+	int type;
+	int line;
+};
+
+class parse
+{
+	public:
+		std::stack<parse_unit> parser;
+	public:
+		void func_return_reduction();
+		void class_function_reduction();
+		void array_search_reduction();
+		void hash_search_reduction();
+		void function_call_reduction();
+		void hash_member_reduction();
+		void hash_members_reduction();
+		void definition_reduction();
+		void assignment_reduction();
+		void identifier_reduction();
+		void scalar_reduction();
+		void print_reduction();
+		void statement_reduction();
+		void statements_reduction();
+		void function_reduction();
+		void parse_work(token_list&);
+		void print_stack();
+		void stack_set_empty();
+};
+
+void parse::func_return_reduction()
+{
+	int tbl[3]={0};
+	std::stack<parse_unit> temp;
+	for(int i=2;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<3;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[0]==__return && (tbl[1]==__scalar || tbl[1]==__identifier || tbl[1]==__use_function) && tbl[2]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__func_return;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<3;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::class_function_reduction()
+{
+	int tbl[10]={0};
+	std::stack<parse_unit> temp;
+	for(int i=9;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<10;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[3]==__func && tbl[4]==__left_curve
+		&& (tbl[5]==__identifier || tbl[5]==__identifiers) && tbl[6]==__right_curve
+		&& tbl[7]==__left_brace && (tbl[8]==__statement || tbl[8]==__statements) && tbl[9]==__right_brace)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__class_function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<7;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[4]==__func && tbl[5]==__left_curve
+		&& tbl[6]==__right_curve && tbl[7]==__left_brace
+		&& (tbl[8]==__statement || tbl[8]==__statements) && tbl[9]==__right_brace)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__class_function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<6;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[4]==__func && tbl[5]==__left_curve
+		&& (tbl[6]==__identifier || tbl[6]==__identifiers) && tbl[7]==__right_curve
+		&& tbl[8]==__left_brace && tbl[9]==__right_brace)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__class_function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<6;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[5]==__func
+		&& tbl[6]==__left_curve && tbl[7]==__right_curve
+		&& tbl[8]==__left_brace && tbl[9]==__right_brace)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__class_function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<5;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::array_search_reduction()
+{
+	int tbl[4]={0};
+	std::stack<parse_unit> temp;
+	for(int i=3;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<4;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[0]==__identifier && tbl[1]==__left_bracket
+		&& (tbl[2]==__identifier || tbl[2]==__scalar || tbl[2]==__use_function)
+		&& tbl[3]==__right_bracket)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__identifier;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<4;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::hash_search_reduction()
+{
+	int tbl[3]={0};
+	std::stack<parse_unit> temp;
+	for(int i=2;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<3;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[0]==__identifier && tbl[1]==__dot && (tbl[2]==__identifier || tbl[2]==__function || tbl[2]==__use_function))
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__identifier;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<3;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::function_call_reduction()
+{
+	int tbl[5]={0};
+	std::stack<parse_unit> temp;
+	for(int i=4;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<5;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[0]==__identifier && tbl[1]==__left_curve
+		&& (tbl[2]==__identifier || tbl[2]==__identifiers || tbl[2]==__scalar || tbl[2]==__scalars)
+		&& tbl[3]==__right_curve)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__use_function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<5;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[1]==__identifier && tbl[2]==__left_curve && tbl[3]==__right_curve)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__use_function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<4;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::hash_member_reduction()
+{
+	int tbl[3]={0};
+	std::stack<parse_unit> temp;
+	for(int i=2;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<3;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[0]==__identifier && tbl[1]==__colon && (tbl[2]==__identifier || tbl[2]==__scalar || tbl[2]==__class_function || tbl[2]==__use_function))
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__hash_member;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<3;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::hash_members_reduction()
+{
+	int tbl[3]={0};
+	std::stack<parse_unit> temp;
+	for(int i=2;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<3;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if((tbl[0]==__hash_member || tbl[0]==__hash_members) && tbl[1]==__comma && tbl[2]==__hash_member)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__hash_members;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<3;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::definition_reduction()
+{
+	int tbl[7]={0};
+	std::stack<parse_unit> temp;
+	for(int i=6;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<7;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[2]==__var && tbl[3]==__identifier && tbl[4]==__equal && (tbl[5]==__scalar || tbl[5]==__identifier || tbl[5]==__use_function) && tbl[6]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__definition;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<5;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[0]==__var && tbl[1]==__identifier && tbl[2]==__equal && tbl[3]==__left_bracket
+		&& (tbl[4]==__identifier || tbl[4]==__identifiers || tbl[4]==__scalar || tbl[4]==__scalars || tbl[4]==__use_function || tbl[4]==__array_search || tbl[4]==__hash_search)
+		&& tbl[5]==__right_bracket && tbl[6]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__definition;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<7;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[1]==__var && tbl[2]==__identifier && tbl[3]==__equal && tbl[4]==__left_bracket
+		&& tbl[5]==__right_bracket && tbl[6]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__definition;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<6;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[0]==__var && tbl[1]==__identifier && tbl[2]==__equal && tbl[3]==__left_brace
+		&& (tbl[4]==__hash_member || tbl[4]==__hash_members)
+		&& tbl[5]==__right_brace && tbl[6]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__definition;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<7;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[1]==__var && tbl[2]==__identifier && tbl[3]==__equal && tbl[4]==__left_brace
+		&& tbl[5]==__right_brace && tbl[6]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__definition;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<6;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[3]==__var && tbl[4]==__identifier && tbl[5]==__equal && tbl[6]==__use_function)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__definition;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<4;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::assignment_reduction()
+{
+	int tbl[4]={0};
+	std::stack<parse_unit> temp;
+	for(int i=3;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<4;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[0]==__identifier
+	&& (tbl[1]==__equal || tbl[1]==__add_equal || tbl[1]==__sub_equal || tbl[1]==__mul_equal || tbl[1]==__div_equal || tbl[1] ==__link_equal)
+	&& (tbl[2]==__scalar || tbl[2]==__identifier || tbl[2]==__use_function) && tbl[3]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__assignment;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<4;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[1]==__identifier
+		&& (tbl[2]==__equal || tbl[2]==__add_equal || tbl[2]==__sub_equal || tbl[2]==__mul_equal || tbl[2]==__div_equal || tbl[2] ==__link_equal)
+		&& tbl[3]==__use_function)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__assignment;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<3;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::identifier_reduction()
+{
+	int tbl[3]={0};
+	std::stack<parse_unit> temp;
+	for(int i=2;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<3;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if((tbl[0]==__identifier || tbl[0]==__identifiers) && tbl[1]==__comma && tbl[2]==__identifier)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__identifiers;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<3;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::scalar_reduction()
+{
+	int tbl[3]={0};
+	std::stack<parse_unit> temp;
+	for(int i=2;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<3;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(((tbl[0]==__scalar || tbl[0]==__scalars || tbl[0]==__identifier || tbl[0]==__identifiers || tbl[0]==__use_function) && tbl[1]==__comma && (tbl[2]==__scalar || tbl[2]==__use_function))
+		|| ((tbl[0]==__scalar || tbl[0]==__scalars || tbl[0]==__use_function) && tbl[1]==__comma && tbl[2]==__identifier))
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__scalars;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<3;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::print_reduction()
+{
+	int tbl[5]={0};
+	std::stack<parse_unit> temp;
+	for(int i=4;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<5;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[0]==__print && tbl[1]==__left_curve
+	&& (tbl[2]==__scalar || tbl[2]==__scalars || tbl[2]==__identifier || tbl[2]==__identifiers || tbl[2]==__use_function)
+	&& tbl[3]==__right_curve && tbl[4]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__print_function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<5;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[1]==__print && tbl[2]==__left_curve	&& tbl[3]==__right_curve && tbl[4]==__semi)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__print_function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<4;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::statement_reduction()
+{
+	int top_type=parser.top().type;
+	if(top_type==__definition || top_type==__assignment || top_type==__print_function || top_type==__use_function
+	|| top_type==__loop || top_type==__loop_continue || top_type==__loop_break || top_type==__choose || top_type==__func_return)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__statement;
+		temp_parse_unit.line=parser.top().line;
+		parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::statements_reduction()
+{
+	int tbl[2]={0};
+	std::stack<parse_unit> temp;
+	for(int i=1;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<2;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if((tbl[0]==__statement || tbl[0]==__statements) && tbl[1]==__statement)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__statements;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<2;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+void parse::function_reduction()
+{
+	int tbl[10]={0};
+	std::stack<parse_unit> temp;
+	for(int i=9;i>=0;--i)
+	{
+		if(parser.empty())
+			break;
+		temp.push(parser.top());
+		tbl[i]=temp.top().type;
+		parser.pop();
+	}
+	for(int i=0;i<10;++i)
+	{
+		if(temp.empty())
+			break;
+		parser.push(temp.top());
+		temp.pop();
+	}
+	if(tbl[0]==__var && tbl[1]==__identifier && tbl[2]==__equal && tbl[3]==__func && tbl[4]==__left_curve
+		&& (tbl[5]==__identifier || tbl[5]==__identifiers) && tbl[6]==__right_curve
+		&& tbl[7]==__left_brace && (tbl[8]==__statement || tbl[8]==__statements) && tbl[9]==__right_brace)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<10;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[1]==__var && tbl[2]==__identifier && tbl[3]==__equal && tbl[4]==__func && tbl[5]==__left_curve
+		&& tbl[6]==__right_curve && tbl[7]==__left_brace
+		&& (tbl[8]==__statement || tbl[8]==__statements) && tbl[9]==__right_brace)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<9;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[1]==__var && tbl[2]==__identifier && tbl[3]==__equal && tbl[4]==__func && tbl[5]==__left_curve
+		&& (tbl[6]==__identifier || tbl[6]==__identifiers) && tbl[7]==__right_curve
+		&& tbl[8]==__left_brace && tbl[9]==__right_brace)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<9;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	else if(tbl[2]==__var && tbl[3]==__identifier && tbl[4]==__equal && tbl[5]==__func
+		&& tbl[6]==__left_curve && tbl[7]==__right_curve
+		&& tbl[8]==__left_brace && tbl[9]==__right_brace)
+	{
+		parse_unit temp_parse_unit;
+		temp_parse_unit.type=__function;
+		temp_parse_unit.line=parser.top().line;
+		for(int i=0;i<8;++i)
+			parser.pop();
+		parser.push(temp_parse_unit);
+	}
+	return;
+}
+
+void parse::parse_work(token_list& lexer)
+{
+	parse_unit temp_parse;
+	token_unit *temp=lexer.get_head();
+	stack_set_empty();
+	while(temp->next)
+	{
+		temp=temp->next;
+		temp_parse.line=temp->line;
+		if(temp->content=="var" || temp->content=="print" || temp->content=="func" || temp->content=="return" || temp->content=="nil")
+		{
+			if(temp->content=="var")
+				temp_parse.type=__var;
+			else if(temp->content=="print")
+				temp_parse.type=__print;
+			else if(temp->content=="func")
+				temp_parse.type=__func;
+			else if(temp->content=="return")
+				temp_parse.type=__return;
+			else if(temp->content=="nil")
+				temp_parse.type=__scalar;
+		}
+		else if(temp->type==IDENTIFIER)
+		{
+			temp_parse.type=__identifier;
+		}
+		else if(temp->content==";" || temp->content=="," || temp->content=="=" || temp->content==":" || temp->content==".")
+		{
+			if(temp->content==";")
+				temp_parse.type=__semi;
+			else if(temp->content==",")
+				temp_parse.type=__comma;
+			else if(temp->content=="=")
+				temp_parse.type=__equal;
+			else if(temp->content==":")
+				temp_parse.type=__colon;
+			else if(temp->content==".")
+				temp_parse.type=__dot;
+		}
+		else if(temp->type==NUMBER || temp->type==STRING)
+		{
+			temp_parse.type=__scalar;
+		}
+		else if(temp->content=="+" || temp->content=="-" || temp->content=="*" || temp->content=="/" || temp->content=="~")
+		{
+			if(temp->content=="+")
+				temp_parse.type=__add_operator;
+			else if(temp->content=="-")
+				temp_parse.type=__sub_operator;
+			else if(temp->content=="*")
+				temp_parse.type=__mul_operator;
+			else if(temp->content=="/")
+				temp_parse.type=__div_operator;
+			else if(temp->content=="~")
+				temp_parse.type=__link_operator;
+		}
+		else if(temp->content=="+=" || temp->content=="-=" || temp->content=="*=" || temp->content=="/=" || temp->content=="~=")
+		{
+			if(temp->content=="+=")
+				temp_parse.type=__add_equal;
+			else if(temp->content=="-=")
+				temp_parse.type=__sub_equal;
+			else if(temp->content=="*=")
+				temp_parse.type=__mul_equal;
+			else if(temp->content=="/=")
+				temp_parse.type=__div_equal;
+			else if(temp->content=="~=")
+				temp_parse.type=__link_equal;
+		}
+		else if(temp->content=="(" || temp->content==")" || temp->content=="[" || temp->content=="]" || temp->content=="{" || temp->content=="}")
+		{
+			char c=temp->content[0];
+			switch(c)
+			{
+				case '(':
+					temp_parse.type=__left_curve;
+					break;
+				case ')':
+					temp_parse.type=__right_curve;
+					break;
+				case '[':
+					temp_parse.type=__left_bracket;
+					break;
+				case ']':
+					temp_parse.type=__right_bracket;
+					break;
+				case '{':
+					temp_parse.type=__left_brace;
+					break;
+				case '}':
+					temp_parse.type=__right_brace;
+					break;
+			}
+		}
+		parser.push(temp_parse);
+		
+		identifier_reduction();
+		scalar_reduction();
+		array_search_reduction();
+		hash_search_reduction();
+		print_reduction();
+		function_call_reduction();
+		func_return_reduction();
+		definition_reduction();
+		assignment_reduction();
+		if(parser.top().type==__definition)
+			std::cout<<"line "<<parser.top().line<<": definition"<<std::endl;
+		else if(parser.top().type==__assignment)
+			std::cout<<"line "<<parser.top().line<<": assignment"<<std::endl;
+		else if(parser.top().type==__print_function)
+			std::cout<<"line "<<parser.top().line<<": print()"<<std::endl;
+		else if(parser.top().type==__use_function)
+			std::cout<<"line "<<parser.top().line<<": call func()"<<std::endl;
+		statement_reduction();//must be put before statements
+		statements_reduction();
+		function_reduction();
+		class_function_reduction();
+		if(parser.top().type==__function)
+			std::cout<<"line "<<parser.top().line<<": function()"<<std::endl;
+		hash_member_reduction();
+		hash_members_reduction();
+	}
+	return;
+}
+
+void parse::print_stack()
+{
+	std::cout<<">> parser stack:"<<std::endl;
+	while(!parser.empty())
+	{
+		if(parser.top().type==__definition)
+			std::cout<<"line "<<parser.top().line<<": definition"<<std::endl;
+		else if(parser.top().type==__assignment)
+			std::cout<<"line "<<parser.top().line<<": assignment"<<std::endl;
+		else if(parser.top().type==__print_function)
+			std::cout<<"line "<<parser.top().line<<": print()"<<std::endl;
+		else if(parser.top().type==__statement)
+			std::cout<<"line "<<parser.top().line<<": statement"<<std::endl;
+		else if(parser.top().type==__statements)
+			std::cout<<"line "<<parser.top().line<<": statements"<<std::endl;
+		else if(parser.top().type==__function)
+			std::cout<<"line "<<parser.top().line<<": function()"<<std::endl;
+		else
+			std::cout<<"line "<<parser.top().line<<": "<<parser.top().type<<std::endl;
+		parser.pop();
+	}
+	return;
+}
+void parse::stack_set_empty()
+{
+	while(!parser.empty())
+		parser.pop();
+	return;
+}
+
+parse nasal_parse;
+
+#endif
diff --git a/version0.4/nasal_print.h b/version0.4/nasal_print.h
new file mode 100644
index 0000000..4826bcd
--- /dev/null
+++ b/version0.4/nasal_print.h
@@ -0,0 +1,74 @@
+#ifndef __NASAL_PRINT_H__
+#define __NASAL_PRINT_H__
+
+#include "nasal_hash.cpp"
+#include "nasal_list.cpp"
+
+void PrintString(std::string &PrintInfo)
+{
+	for(int i=0;i<(int)PrintInfo.length();++i)
+	{
+		if(PrintInfo[i]=='\\' && i+1<(int)PrintInfo.length())
+		{
+			switch(PrintInfo[i+1])
+			{
+				case 'n':
+					std::cout<<"\n";
+					++i;
+					break;
+				case 't':
+					std::cout<<"\t";
+					++i;
+					break;
+				case 'r':
+					std::cout<<"\r";
+					++i;
+					break;
+				case '\\':
+					std::cout<<"\\";
+					++i;
+					break;
+				case '\'':
+					std::cout<<"\'";
+					++i;
+					break;
+				case '\"':
+					std::cout<<"\"";
+					++i;
+					break;
+				default:
+					//error occurred
+					std::cout<<"[Error]: Incorrect escape character \'"<<PrintInfo[i]<<PrintInfo[i+1]<<"\' .";
+					++i;
+					break;
+			}
+		}
+		else if(PrintInfo[i]=='\\' && i+1>=(int)PrintInfo.length())
+		{
+			//error occurred
+			std::cout<<"[Error]: Missing character after \'\\\'";
+		}
+		else
+			std::cout<<PrintInfo[i];
+	}
+	return;
+}
+void PrintVar(var Var)
+{
+	if(Var.type==VAR_LLINT)
+		std::cout<<*((long long int *)Var.data);
+	else if(Var.type==VAR_DOUBLE)
+		std::cout<<*((double *)Var.data);
+	else if(Var.type==VAR_CHAR)
+		std::cout<<*((char *)Var.data);
+	else if(Var.type==VAR_STRING)
+		PrintString(*((std::string *)Var.data));
+	else if(Var.type==VAR_LIST)
+		;//((nasal_list *)Var.data)->print_list();
+	else if(Var.type==VAR_HASH)
+		;//((nasal_hash *)Var.data)->PrintHash();
+	else
+		std::cout<<"[Error] Null type or function";
+}
+
+#endif
diff --git a/version0.4/nasal_token.cpp b/version0.4/nasal_token.cpp
new file mode 100644
index 0000000..cfbc55e
--- /dev/null
+++ b/version0.4/nasal_token.cpp
@@ -0,0 +1,108 @@
+#ifndef __NASAL_TOKEN_CPP__
+#define __NASAL_TOKEN_CPP__
+
+#include "nasal_token.h"
+#include "nasal_var_stack.h"
+#include "nasal_func_stack.h"
+
+token_list::token_list()
+{
+	list_range=0;
+	head=new token_unit;
+	head->type=FUNC_BEGIN;
+	head->content="__process_begin";
+	head->line=0;
+	head->next=NULL;
+}
+token_list::~token_list()
+{
+	token_unit *temp=head;
+	token_unit *this_node=NULL;
+	while(temp->next)
+	{
+		this_node=temp;
+		temp=temp->next;
+		delete this_node;
+	}
+	delete temp;
+}
+token_unit* token_list::get_head()
+{
+	return head;
+}
+int token_list::get_list_range()
+{
+	return list_range;
+}
+void token_list::print_line_token(const int _line)
+{
+	std::cout<<"line "<<_line<<": ";
+	token_unit *temp=head;
+	while(temp->next)
+	{
+		temp=temp->next;
+		if(temp->line==_line)
+			std::cout<<temp->content<<" ";
+		else if(temp->line>_line)
+			break;
+	}
+	std::cout<<std::endl;
+	return;
+}
+void token_list::delete_all()
+{
+	if(!head->next)
+		return;
+	token_unit *temp=head;
+	token_unit *this_node=NULL;
+	temp=temp->next;
+	head->next=NULL;
+	while(temp->next)
+	{
+		this_node=temp;
+		temp=temp->next;
+		delete this_node;
+	}
+	delete temp;
+	return;
+}
+void token_list::append(const int _line,const int _type,std::string &_content)
+{
+	token_unit *temp=head;
+	while(temp->next)
+		temp=temp->next;
+	++list_range;
+	temp->next=new token_unit;
+	temp=temp->next;
+	temp->next=NULL;
+	temp->type=_type;
+	temp->line=_line;
+	temp->content=_content;
+	return;
+}
+void token_list::print()
+{
+	token_unit *temp=head;
+	std::cout<<"line "<<temp->line<<": "<<"( ProcessBegin | "<<temp->content<<" )"<<std::endl;
+	if(!head->next)
+		return;
+	while(temp->next)
+	{
+		temp=temp->next;
+		std::cout<<"line "<<temp->line<<": ";
+		if(temp->type==OPERATOR)
+			std::cout<<"( Operator     | ";
+		else if(temp->type==IDENTIFIER)
+			std::cout<<"( Identifier   | ";
+		else if(temp->type==NUMBER)
+			std::cout<<"( Number       | ";
+		else if(temp->type==RESERVEWORD)
+			std::cout<<"( ReserveWord  | ";
+		else if(temp->type==STRING)
+			std::cout<<"( String       | ";
+		std::cout<<temp->content<<" )"<<std::endl;
+	}
+	return;
+}
+
+#endif
diff --git a/version0.4/nasal_token.h b/version0.4/nasal_token.h
new file mode 100644
index 0000000..77c8ea2
--- /dev/null
+++ b/version0.4/nasal_token.h
@@ -0,0 +1,38 @@
+#ifndef __NASAL_TOKEN_H__
+#define __NASAL_TOKEN_H__
+
+#include "nasal_var.h"
+
+//for token and lexer
+#define OPERATOR    1 //界符 or 运算符 
+#define IDENTIFIER  2 //自定义标识符 
+#define NUMBER      3 //数字 
+#define RESERVEWORD 4 //关键字 
+#define STRING      5 //字符串类型 
+
+struct token_unit
+{
+	int type;
+	std::string content;
+	int line;
+	token_unit *next;
+};
+
+class token_list
+{
+	private:
+		token_unit *head;
+		int list_range;
+	public:
+		token_list();
+		~token_list();
+		token_unit* get_head();
+		int get_list_range();
+		void print_line_token(const int);
+		void delete_all();
+		void append(const int,const int,std::string&);
+		void print();
+};
+
+token_list nasal_lexer;
+#endif
diff --git a/version0.4/nasal_var.cpp b/version0.4/nasal_var.cpp
new file mode 100644
index 0000000..813b62d
--- /dev/null
+++ b/version0.4/nasal_var.cpp
@@ -0,0 +1,140 @@
+#ifndef __NASAL_VAR_CPP__
+#define __NASAL_VAR_CPP__
+
+var::var()
+{
+	type=VAR_NONE;
+	data=NULL;
+}
+var::var(const var &temp)
+{
+	type=temp.type;
+	switch(type)
+	{
+		case VAR_NONE:
+			data=NULL;
+			break;
+		case VAR_LLINT:
+			data=new long long int;
+			*((long long int *)data)=*((long long int *)temp.data);
+			break;
+		case VAR_DOUBLE:
+			data=new double;
+			*((double *)data)=*((double *)temp.data);
+			break;
+		case VAR_CHAR:
+			data=new char;
+			*((char *)data)=*((char *)temp.data);
+			break;
+		case VAR_STRING:
+			data=new std::string;
+			*((std::string *)data)=*((std::string *)temp.data);
+			break;
+		case VAR_LIST:
+			data=new nasal_list;
+			*((nasal_list *)data)=*((nasal_list *)temp.data);
+			break;
+		case VAR_HASH:
+			data=new nasal_hash;
+			*((nasal_hash *)data)=*((nasal_hash *)temp.data);
+			break;
+		case VAR_FUNC:
+			data=new func;
+			*((func *)data)=*((func *)temp.data);
+			break;
+	}
+}
+var::~var()
+{
+	if(data)
+		switch(type)
+		{
+			case VAR_LLINT:
+				delete (long long int *)data;
+				break;
+			case VAR_DOUBLE:
+				delete (double *)data;
+				break;
+			case VAR_CHAR:
+				delete (char *)data;
+				break;
+			case VAR_STRING:
+				delete (std::string *)data;
+				break;
+			case VAR_LIST:
+				delete (nasal_list *)data;
+				break;
+			case VAR_HASH:
+				delete (nasal_hash *)data;
+				break;
+			case VAR_FUNC:
+				delete (func *)data;
+				break;
+		}
+}
+var& var::operator=(const var &temp)
+{
+	if(data)
+		switch(type)
+		{
+			case VAR_LLINT:
+				delete (long long int *)data;
+				break;
+			case VAR_DOUBLE:
+				delete (double *)data;
+				break;
+			case VAR_CHAR:
+				delete (char *)data;
+				break;
+			case VAR_STRING:
+				delete (std::string *)data;
+				break;
+			case VAR_LIST:
+				delete (nasal_list *)data;
+				break;
+			case VAR_HASH:
+				delete (nasal_hash *)data;
+				break;
+			case VAR_FUNC:
+				delete (func *)data;
+				break;
+		}
+	type=temp.type;
+	switch(type)
+	{
+		case VAR_NONE:
+			data=NULL;
+			break;
+		case VAR_LLINT:
+			data=new long long int;
+			*((long long int *)data)=*((long long int *)temp.data);
+			break;
+		case VAR_DOUBLE:
+			data=new double;
+			*((double *)data)=*((double *)temp.data);
+			break;
+		case VAR_CHAR:
+			data=new char;
+			*((char *)data)=*((char *)temp.data);
+			break;
+		case VAR_STRING:
+			data=new std::string;
+			*((std::string *)data)=*((std::string *)temp.data);
+			break;
+		case VAR_LIST:
+			data=new nasal_list;
+			*((nasal_list *)data)=*((nasal_list *)temp.data);
+			break;
+		case VAR_HASH:
+			data=new nasal_hash;
+			*((nasal_hash *)data)=*((nasal_hash *)temp.data);
+			break;
+		case VAR_FUNC:
+			data=new func;
+			*((func *)data)=*((func *)temp.data);
+			break;
+	}
+	return *this;
+}
+
+#endif
diff --git a/version0.4/nasal_var.h b/version0.4/nasal_var.h
new file mode 100644
index 0000000..50972fc
--- /dev/null
+++ b/version0.4/nasal_var.h
@@ -0,0 +1,24 @@
+#ifndef __NASAL_VAR_H__
+#define __NASAL_VAR_H__
+
+#define VAR_NONE   0
+#define VAR_LLINT  1
+#define VAR_DOUBLE 2
+#define VAR_CHAR   3
+#define VAR_STRING 4
+#define VAR_LIST   5
+#define VAR_HASH   6
+#define VAR_FUNC   7
+
+class var
+{
+	public:
+		int type;
+		void *data;
+		var();
+		var(const var&);
+		~var();
+		var& operator=(const var&);
+};
+
+#endif
diff --git a/version0.4/nasal_var_stack.h b/version0.4/nasal_var_stack.h
new file mode 100644
index 0000000..7965a3c
--- /dev/null
+++ b/version0.4/nasal_var_stack.h
@@ -0,0 +1,151 @@
+#ifndef __NASAL_VAR_STACK_H__
+#define __NASAL_VAR_STACK_H__
+
+#include "nasal_print.h"
+
+struct var_stack_unit
+{
+	std::string var_name;
+	var var_detail;
+	var_stack_unit *next;
+};
+
+class var_stack
+{
+	private:
+		var_stack_unit *head;
+	public:
+		var_stack()
+		{
+			head=new var_stack_unit;
+			head->var_name="null";
+			head->next=NULL;
+		}
+		~var_stack()
+		{
+			var_stack_unit *temp=head;
+			var_stack_unit *this_node=NULL;
+			while(temp->next)
+			{
+				this_node=temp;
+				temp=temp->next;
+				delete this_node;
+			}
+			delete temp;
+		}
+		void append_var(std::string& varia_name,var& temp_var)
+		{
+			var_stack_unit *temp=head;
+			while(temp->next)
+				temp=temp->next;
+			temp->next=new var_stack_unit;
+			temp=temp->next;
+			temp->var_name=varia_name;
+			temp->var_detail=temp_var;
+			temp->next=NULL;
+		}
+		void print_var()
+		{
+			var_stack_unit *temp=head;
+			while(temp->next)
+			{
+				temp=temp->next;
+				std::cout<<"[";
+				switch(temp->var_detail.type)
+				{
+					case VAR_NONE:
+						std::cout<<"null";
+						break;
+					case VAR_LLINT:
+						std::cout<<"int";
+						break;
+					case VAR_DOUBLE:
+						std::cout<<"float";
+						break;
+					case VAR_CHAR:
+						std::cout<<"char";
+						break;
+					case VAR_STRING:
+						std::cout<<"string";
+						break;
+					case VAR_LIST:
+						std::cout<<"array";
+						break;
+					case VAR_HASH:
+						std::cout<<"hash";
+						break;
+				}
+				std::cout<<"]: "<<temp->var_name<<" : ";
+				if(temp->var_detail.type!=VAR_STRING)
+					PrintVar(temp->var_detail);
+				else
+					std::cout<<*((std::string *)temp->var_detail.data);
+				std::cout<<std::endl;
+			}
+			return;
+		}
+		var search_var(std::string varia_name)
+		{
+			var temp_var;
+			temp_var.data=NULL;
+			temp_var.type=VAR_NONE;
+			var_stack_unit *temp=head;
+			while(temp->next)
+			{
+				temp=temp->next;
+				if(temp->var_name==varia_name)
+				{
+					temp_var=temp->var_detail;
+					break;
+				}
+			}
+			return temp_var;
+		}
+		void edit_var(std::string varia_name,var &temp_var)
+		{
+			var_stack_unit *temp=head;
+			while(temp->next)
+			{
+				temp=temp->next;
+				if(temp->var_name==varia_name)
+				{
+					temp->var_detail=temp_var;
+					break;
+				}
+			}
+			return;
+		}
+		void pop_var()
+		{
+			var_stack_unit *temp=head;
+			var_stack_unit *end_temp;
+			if(!head->next)
+				return;
+			while(temp->next)
+			{
+				end_temp=temp;
+				temp=temp->next;
+			}
+			end_temp->next=NULL;
+			delete temp;
+		}
+		void delete_all()
+		{
+			var_stack_unit *temp=head->next;
+			var_stack_unit *this_node=NULL;
+			head->next=NULL;
+			if(!temp)
+				return;
+			while(temp->next)
+			{
+				this_node=temp;
+				temp=temp->next;
+				delete this_node;
+			}
+			delete temp;
+			return;
+		}
+};
+var_stack nasal_var_stack;
+
+#endif