diff --git a/version0.9/main.cpp b/version0.9/main.cpp
deleted file mode 100644
index bf1d5ca..0000000
--- a/version0.9/main.cpp
+++ /dev/null
@@ -1,68 +0,0 @@
-#include "nasal_lexer.h"
-#include "nasal_parser.h"
-#include <iostream>
-#include <cstring>
-
-int main()
-{
-	resource_programme_process prog;
-	nasal_lexer lex;
-	nasal_parser pas;
-	std::string command;
-	std::cout<<">> nasal script interpreter by ValKmjolnir"<<std::endl;
-	std::cout<<">> input \"help\" to find help."<<std::endl;
-	std::cout<<">> Be careful: this interpreter uses strict methods to check if there's an error."<<std::endl;
-	std::cout<<"   Always add \";\" after each statement (except loop and if-else)."<<std::endl;
-	while(1)
-	{
-		std::cout<<">> ";
-		std::getline(std::cin,command);
-		if(command=="help")
-		{
-			std::cout<<">> nasal script interpreter by ValKmjolnir"<<std::endl;
-			std::cout<<">> 1.         |input file name to load the file."<<std::endl;
-			std::cout<<">> 2. \"cls\"   |clear the screen."<<std::endl;
-			std::cout<<">> 3. \"exit\"  |shut down the interpreter."<<std::endl;
-			std::cout<<">> 4. \"lexer\" |run and show the lexer. (-lexer)"<<std::endl;
-			std::cout<<">> 5. \"parser\"|run parser. (-parser)"<<std::endl;
-			std::cout<<">> 6. \"del\"   |delete all elements in stack."<<std::endl;
-			std::cout<<">> 7. \"run\"   |run the programme in stack. (-lexer -parser)"<<std::endl;
-			std::cout<<">> 8. \"rs\"    |check the source program."<<std::endl;
-		}
-		else if(command=="cls")
-		{
-			system("cls");
-			//windows  system("cls);
-			//linux system("clear");
-			//macOS system("clear");
-		}
-		else if(command=="rs")
-			prog.print_file();
-		else if(command=="exit")
-		{
-			break;
-		}
-		else if(command=="lexer")
-		{
-			lex.lexer_process(prog.use_file());
-			lex.print_lexer();
-		}
-		else if(command=="del")
-		{
-			prog.del_file();
-			std::cout<<">>[Delete] Complete."<<std::endl;
-		}
-		else if(command=="parser")
-		{
-			pas.parse_process(lex.return_list(),true);
-		}
-		else if(command=="run")
-		{
-			lex.lexer_process(prog.use_file());
-			pas.parse_process(lex.return_list(),false);
-		}
-		else
-			prog.input_file(command);
-	}
-	return 0;
-}