diff --git a/version0.3/nasal_func.cpp b/version0.3/nasal_func.cpp
deleted file mode 100644
index fa8de63..0000000
--- a/version0.3/nasal_func.cpp
+++ /dev/null
@@ -1,174 +0,0 @@
-#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