diff --git a/balloon/balloon_lexer.h b/balloon/balloon_lexer.h
index e7b5864..7c1731a 100644
--- a/balloon/balloon_lexer.h
+++ b/balloon/balloon_lexer.h
@@ -81,11 +81,15 @@ bool check_number(std::string str)
 class resource_file
 {
 	private:
-		std::list<char> resource;
+		std::list<char> libsource;   // place for lib code
+		std::list<char> resource;    // place for user code
+		std::list<char> totalsource; // link lib and user code
 	public:
 		void set_clear()
 		{
 			resource.clear();
+			libsource.clear();
+			totalsource.clear();
 			return;
 		}
 		void add_lib()
@@ -95,12 +99,34 @@ class resource_file
 			if(access("lib/math.nas",0))
 				std::cout<<">>[Resource] lack lib file: lib/math.nas ."<<std::endl;
 			else
-				input_file(lib_name);
+				input_lib_file(lib_name);
 			lib_name="lib/io.nas";
 			if(access("lib/io.nas",0))
 				std::cout<<">>[Resource] lack lib file: lib/io.nas ."<<std::endl;
 			else
-				input_file(lib_name);
+				input_lib_file(lib_name);
+			return;
+		}
+		void input_lib_file(std::string filename)
+		{
+			std::ifstream fin(filename,std::ios::binary);
+			if(fin.fail())
+			{
+				std::cout<<">>[Resource] cannot find a file named \'"<<filename<<"\' ."<<std::endl;
+				return;
+			}
+			char c;
+			while(!fin.eof())
+			{
+				c=fin.get(); 
+				if(fin.eof())
+					break;
+				if(0<=c && c<128)
+					libsource.push_back(c);
+				else
+					libsource.push_back(' ');
+			}
+			libsource.push_back('\n');
 			return;
 		}
 		void input_file(std::string filename)
@@ -127,7 +153,12 @@ class resource_file
 		}
 		std::list<char>& get_resource()
 		{
-			return resource;
+			totalsource.clear();
+			for(std::list<char>::iterator i=libsource.begin();i!=libsource.end();++i)
+				totalsource.push_back(*i);
+			for(std::list<char>::iterator i=resource.begin();i!=resource.end();++i)
+				totalsource.push_back(*i);
+			return totalsource;
 		}
 		void print_file()
 		{
diff --git a/balloon/main.cpp b/balloon/main.cpp
index cee21b8..1d06e83 100644
--- a/balloon/main.cpp
+++ b/balloon/main.cpp
@@ -25,8 +25,7 @@ int main()
 			std::cout<<">> 7. [del   ] |delete program in memory."<<std::endl;
 			std::cout<<">> 8. [run   ] |run the programme in stack. (-lexer -parser)"<<std::endl;
 			std::cout<<">> 9. [rs    ] |check the source program."<<std::endl;
-			std::cout<<">>10. [lib   ] |add lib into resource codes."<<std::endl;
-			std::cout<<">>11. [sound ] |make noise(?)."<<std::endl;
+			std::cout<<">>10. [sound ] |make noise(?)."<<std::endl;
 		}
 		else if(command=="cls")
 		{
@@ -44,8 +43,6 @@ int main()
 			lex.scanner(prog.get_resource());
 			lex.print_token_list();
 		}
-		else if(command=="lib")
-			prog.add_lib();
 		else if(command=="del")
 		{
 			prog.set_clear();
@@ -66,7 +63,7 @@ int main()
 			{
 				alert_sound();
 				std::cout<<">>[Lexer] error(s) found,stop."<<std::endl;
-			}	
+			}
 		}
 		else if(command=="ast")
 		{
@@ -92,6 +89,7 @@ int main()
 		}
 		else if(command=="run")
 		{
+			prog.add_lib();
 			lex.scanner(prog.get_resource());
 			lex.generate_detail_token();
 			if(!lex.get_error())