Add 'else if' recognition

version1.0/choose.txt

@@ -8,6 +8,10 @@ elsif(this_token.type==__elsif)
     parse.push(this_token);
     return;
 }
+else if(this_token.type!=__else)
+{
+    exit(0);
+}
 elsif(this_token.type==__elsif)
 {
     parse.push(this_token);

version1.0/func.txt

@@ -6,4 +6,5 @@ var f=func(n,m,dynamic...)
     n+=m;
     return dynamic;
 };
-print(f(1,1,0,0,0,0,0)[3]);
+print(f(1,1,0,0,0,0,0)[3]);
+function([0,1,2,3],{str:"str"});

version1.0/main.cpp

@@ -18,7 +18,7 @@ int main()
 			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<<">> 5. [parser] |run parser and see parse stack & parse result(s). (-parser)"<<std::endl;
 			std::cout<<">> 6. [ast   ] |print the abstract syntax tree."<<std::endl;
 			std::cout<<">> 7. [del   ] |delete program in memory."<<std::endl;
 			std::cout<<">> 8. [run   ] |run the programme in stack. (-lexer -parser)"<<std::endl;

version1.0/nasal_parser.h

@@ -105,7 +105,7 @@ class nasal_parser
 			if(!error)
 				root.run();
 			else
-				std::cout<<">>[Parse] "<<error<<"error(s) occurred,stop."<<std::endl;
+				std::cout<<">>[Parse] "<<error<<" error(s) occurred,stop."<<std::endl;
 			return;
 		}
 		void parse_main_work();
@@ -120,6 +120,7 @@ class nasal_parser
 		void definition_expr();
 		void assignment_expr();
 		void loop_expr();
+		bool else_if_check();
 		void if_else_expr();
 		void add_sub_operator_expr();
 		void mul_div_operator_expr();
@@ -396,6 +397,24 @@ void nasal_parser::assignment_expr()
 	}
 	return;
 }
+bool nasal_parser::else_if_check()
+{
+	token temp=this_token;
+	if(this_token.type!=__else)
+		return false;
+	else
+	{
+		get_token();
+		if(this_token.type!=__if)
+		{
+			parse.push(this_token);
+			this_token=temp;// to avoid when recognizing 'else' without 'if' 
+			
+			return false;
+		}
+	}
+	return true;
+}
 void nasal_parser::if_else_expr()
 {
 	get_token();
@@ -433,7 +452,7 @@ void nasal_parser::if_else_expr()
 	}
 	statements_block();
 	get_token();
-	while(this_token.type==__elsif)
+	while(this_token.type==__elsif || else_if_check())
 	{
 		get_token();
 		if(this_token.type!=__left_curve)