diff --git a/version0.7/pda.h b/version0.7/pda.h
deleted file mode 100644
index cddf77e..0000000
--- a/version0.7/pda.h
+++ /dev/null
@@ -1,238 +0,0 @@
-#ifndef __PDA_H__
-#define __PDA_H__
-
-#include <stack>
-
-struct parse_unit
-{
-	int line;
-	int type;
-};
-
-enum token_type
-{
-	__stack_end,
-	__null_end,// $
-	__equal,// =
-	__cmp_equal,// ==
-	__cmp_not_equal,// !=
-	__cmp_less,__cmp_less_or_equal,// < <=
-	__cmp_more,__cmp_more_or_equal,// > >=
-	__and_operator,__or_operator,__nor_operator,// and or !
-	__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
-	__id,__identifier,__identifiers,__identifier_end,__lacked_identifier,
-	__parameter,__parameters,__parameter_end,
-	__number,__string,
-	__scalar,__scalars,__scalar_end,
-	__list,__hash,
-	__hash_member,__hash_members,__hash_member_end,__hash_suffix,
-	__statement,__statements,
-	__function,//function(){}
-	__definition,
-	__assignment,__pre_assignment,
-	__calculation,
-	__loop,__continue,__break,__for,__forindex,__foreach,__while,// for()while() continue; break;
-	__choose,__if,__elsif,__else,// if else if else
-	__return
-};
-
-const int max_token_len=20;
-struct cmp_seq
-{
-	int tokens[max_token_len];
-	int res;
-}par[]=
-{
-	{{__var,__identifier,__equal,__scalar,__semi},                                __definition},
-	{{__var,__identifier,__equal,__identifier,__semi},                            __definition},
-	{{__var,__identifier,__equal,__list,__semi},                                  __definition},
-	{{__var,__identifier,__equal,__hash,__semi},                                  __definition},
-	{{__var,__identifier,__equal,__function},                                     __definition},
-	{{__var,__left_curve,__identifiers,__right_curve,__equal,__identifier,__semi},__definition},
-	{{__var,__left_curve,__identifiers,__right_curve,__equal,__list,__semi},      __definition},
-	{{__identifier,__dot,__identifier},                                           __identifier},
-	{{__identifier,__left_bracket,__scalar,__right_bracket},                      __identifier},
-	{{__identifier,__left_bracket,__identifier,__right_bracket},                  __identifier},
-	{{__identifier,__left_bracket,__calculation,__right_bracket},                 __identifier},
-	{{__identifier,__left_curve,__right_curve},                                   __identifier},
-	{{__identifier,__left_curve,__scalar,__right_curve},                          __identifier}
-};
-int num_of_par=sizeof(par)/sizeof(cmp_seq);
-
-class PDA
-{
-	private:
-		std::stack<parse_unit> main_stack;
-		std::stack<parse_unit> error_stack;
-	public:
-		void stack_input(std::stack<parse_unit>& temp)
-		{
-			while(!temp.empty())
-			{
-				main_stack.push(temp.top());
-				temp.pop();
-			}
-			return;
-		}
-		void print_error()
-		{
-			if(!error_stack.empty())
-			{
-				std::stack<parse_unit> temp;
-				while(!error_stack.empty())
-				{
-					temp.push(error_stack.top());
-					error_stack.pop();
-				}
-				std::cout<<">>[Error] Parse error:";
-				int now_line=0;
-				while(!temp.empty())
-				{
-					if(temp.top().line!=now_line)
-					{
-						now_line=temp.top().line;
-						std::cout<<std::endl<<"line "<<now_line<<" ";
-					}
-					print_token_type(temp.top().type);
-					std::cout<<" ";
-					temp.pop();
-				}
-				std::cout<<std::endl;
-			}
-			else
-				std::cout<<">>[Parse] 0 error occurred."<<std::endl;
-			return;
-		}
-		bool extend_comp_progress(const int type)
-		{
-			std::stack<parse_unit> recognized_stack;
-			std::stack<parse_unit> comp_stack;
-			parse_unit temp;
-			temp.line=0;
-			temp.type=0;
-			for(int i=0;i<num_of_par;++i)
-			{
-				if(par[i].res==type)
-				{
-					while(!comp_stack.empty())
-						comp_stack.pop();
-					for(int j=max_token_len-1;j>=0;--j)
-					{
-						if(par[i].tokens[j])
-						{
-							temp.type=par[i].tokens[j];
-							comp_stack.push(temp);
-						}
-					}
-					while((!comp_stack.empty()) && (!main_stack.empty()))
-					{
-						if(comp_stack.top().type==main_stack.top().type)
-						{
-							comp_stack.pop();
-							recognized_stack.push(main_stack.top());
-							main_stack.pop();
-						}
-						else if(comp_stack.top().type==__null_end)
-							comp_stack.pop();
-						else if(comp_stack.top().type!=main_stack.top().type)
-						{
-							if(!extend_comp_progress(comp_stack.top().type))
-							{
-								while(!recognized_stack.empty())
-								{
-									main_stack.push(recognized_stack.top());
-									recognized_stack.pop();
-								}
-								break;
-							}
-							else
-								comp_stack.pop();
-						}
-					}
-					if(comp_stack.empty())
-					{
-						while(!recognized_stack.empty())
-							recognized_stack.pop();
-						return true;
-					}
-				}
-			}
-			return false;
-		}
-		void main_comp_progress()
-		{
-			std::stack<parse_unit> recognized_stack;
-			std::stack<parse_unit> comp_stack;
-			parse_unit temp;
-			temp.line=0;
-			temp.type=0;
-			
-			while(!main_stack.empty())
-			{
-				bool ispar=false;
-				for(int i=0;i<num_of_par;++i)
-				{
-					while(!comp_stack.empty())
-						comp_stack.pop();
-					for(int j=max_token_len-1;j>=0;--j)
-					{
-						if(par[i].tokens[j])
-						{
-							temp.type=par[i].tokens[j];
-							comp_stack.push(temp);
-						}
-					}
-					while((!comp_stack.empty()) && (!main_stack.empty()))
-					{
-						if(comp_stack.top().type==main_stack.top().type)
-						{
-							comp_stack.pop();
-							recognized_stack.push(main_stack.top());
-							main_stack.pop();
-						}
-						else if(comp_stack.top().type==__null_end)
-							comp_stack.pop();
-						else if(comp_stack.top().type!=main_stack.top().type)
-						{
-							if(!extend_comp_progress(comp_stack.top().type))
-							{
-								while(!recognized_stack.empty())
-								{
-									main_stack.push(recognized_stack.top());
-									recognized_stack.pop();
-								}
-								break;
-							}
-							else
-								comp_stack.pop();
-						}
-					}
-					if(comp_stack.empty())
-					{
-						while(!recognized_stack.empty())
-							recognized_stack.pop();
-						ispar=true;
-						break;
-					}
-				}
-				if(!ispar && !main_stack.empty())
-				{
-					error_stack.push(main_stack.top());
-					main_stack.pop();
-				}
-			}
-			print_error();
-			return;
-		}
-};
-#endif