diff --git a/version0.16/version0.16.1/ast_generator.h b/version0.16/version0.16.1/ast_generator.h
deleted file mode 100644
index 0dd99aa..0000000
--- a/version0.16/version0.16.1/ast_generator.h
+++ /dev/null
@@ -1,205 +0,0 @@
-#ifndef __AST_GENERATOR_H__
-#define __AST_GENERATOR_H__
-
-class ast_generator
-{
-	private:
-		ast_tree_node root;
-		std::stack<parse_unit> parse;
-		std::stack<ast_tree_node> node_cache;
-		bool can_run;
-	public:
-		ast_generator()
-		{
-			can_run=true;
-		}
-		bool number_expr_gen()
-		{
-			number_expr t;
-			t.set_line(parse.top().line);
-			t.set_number(parse.top().content);
-			if(node_cache.empty())
-			{
-				node_cache.push(t);
-				return true;
-			}
-			int type=node_cache.top().return_type();
-			if((type==__add_operator || type==__sub_operator || type==__mul_operator || type==__div_operator || type==__link_operator) && node_cache.top().child_num()<=1)
-			{
-				node_cache.top().add_child(t);
-				return true;
-			}
-			else if((type==__add_operator || type==__sub_operator || type==__link_operator)
-					&& (node_cache.top().return_last_child().return_type()==__mul_operator || node_cache.top().return_last_child().return_type()==__div_operator)
-					&& node_cache.top().return_last_child().child_num()<2)
-			{
-				node_cache.top().return_last_child().add_child(t);
-				return true;
-			}
-			else
-			{
-				node_cache.push(t);
-				return true;
-			}
-			return true;
-		}
-		bool string_expr_gen()
-		{
-			string_expr t;
-			t.set_line(parse.top().line);
-			std::string tstr=parse.top().content;
-			std::string str="";
-			for(int i=1;i<(int)tstr.length()-1;++i)
-				str+=tstr[i];
-			t.set_str(str);
-			if(node_cache.empty())
-			{
-				node_cache.push(t);
-				return true;
-			}
-			int type=node_cache.top().return_type();
-			if((type==__add_operator || type==__sub_operator || type==__mul_operator || type==__div_operator || type==__link_operator) && node_cache.top().child_num()<2)
-			{
-				node_cache.top().add_child(t);
-				return true;
-			}
-			else if((type==__add_operator || type==__sub_operator || type==__link_operator)
-					&& (node_cache.top().return_last_child().return_type()==__mul_operator || node_cache.top().return_last_child().return_type()==__div_operator)
-					&& node_cache.top().return_last_child().child_num()<2)
-			{
-				node_cache.top().return_last_child().add_child(t);
-				return true;
-			}
-			else
-			{
-				node_cache.push(t);
-				return true;
-			}
-			return true;
-		}
-		bool operator_expr_gen()
-		{
-			operator_expr t;
-			t.set_line(parse.top().line);
-			t.set_operator_type(parse.top().type);
-			if(node_cache.empty())
-			{
-				if(t.return_type()==__add_operator || t.return_type()==__sub_operator)
-				{
-					number_expr nullnum;
-					nullnum.set_line(parse.top().line);
-					std::string strnum="0";
-					nullnum.set_number(strnum);
-					t.add_child(nullnum);
-					node_cache.push(t);
-					return true;
-				}
-				else
-				{
-					std::cout<<">>[Error] parse error in line "<<parse.top().line<<":missed number or string."<<std::endl;
-					return false;
-				}
-			}
-			int cache_top_type=node_cache.top().return_type();
-			if(cache_top_type==__number || cache_top_type==__string)
-			{
-				t.add_child(node_cache.top());
-				node_cache.pop();
-				node_cache.push(t);
-				return true;
-			}
-			else if(cache_top_type==__add_operator || cache_top_type==__sub_operator || cache_top_type==__link_operator)
-			{
-				if(parse.top().type==__add_operator || parse.top().type==__sub_operator || parse.top().type==__link_operator)
-				{
-					t.add_child(node_cache.top());
-					node_cache.pop();
-					node_cache.push(t);
-				}
-				else if(parse.top().type==__mul_operator || parse.top().type==__div_operator)
-				{
-					if(node_cache.top().return_last_child().child_num()<2)
-					{
-						std::cout<<">>[Error] parse error:missing number or string at line "<<node_cache.top().return_line()<<"."<<std::endl;
-						return false;
-					}
-					t.add_child(node_cache.top().return_last_child());
-					node_cache.top().return_last_child()=t;
-				}
-				return true;
-			}
-			else if((cache_top_type==__mul_operator || cache_top_type==__div_operator) && node_cache.top().child_num()<2)
-			{
-				t.add_child(node_cache.top());
-				node_cache.pop();
-				node_cache.push(t);
-				return true;
-			}
-			return true;
-		}
-		void input_token_stack(std::stack<parse_unit>& temp)
-		{
-			parse=temp;
-			return;
-		}
-		void gen_main_prog()
-		{
-			can_run=true;
-			root.clear_tree();
-			while(!parse.empty())
-			{
-				int type=parse.top().type;
-				bool is_correct=false;
-				switch(type)
-				{
-					case __number:is_correct=number_expr_gen();break;
-					case __string:is_correct=string_expr_gen();break;
-					case __add_operator:is_correct=operator_expr_gen();break;
-					case __sub_operator:is_correct=operator_expr_gen();break;
-					case __mul_operator:is_correct=operator_expr_gen();break;
-					case __div_operator:is_correct=operator_expr_gen();break;
-					case __link_operator:is_correct=operator_expr_gen();break;
-					case __semi:is_correct=true;root.add_child(node_cache.top());node_cache.pop();break;
-					default:
-						is_correct=false;
-						std::cout<<">>[Error] parse error in line "<<parse.top().line<<":";
-						print_token(parse.top().type);
-						std::cout<<" at an incorrect place."<<std::endl;
-						break;
-				}
-				if(!is_correct)
-					can_run=false;
-				parse.pop();
-			}
-			std::stack<ast_tree_node> temp_cache;
-			while(!node_cache.empty())
-			{
-				temp_cache.push(node_cache.top());
-				node_cache.pop();
-			}
-			while(!temp_cache.empty())
-			{
-				root.add_child(temp_cache.top());
-				temp_cache.pop();
-			}
-			return;
-		}
-		void print_ast()
-		{
-			//if(can_run)
-				root.print(0);
-			//else
-			//	std::cout<<">>[Parse] Error(s) occurred,stop."<<std::endl;
-			return;
-		}
-		void run()
-		{
-			if(can_run)
-				root.print(0);
-			else
-				std::cout<<">>[Parse] Error(s) occurred,stop."<<std::endl;
-			return;
-		}
-};
-
-#endif