diff --git a/version0.2/nasal_func_stack.h b/version0.2/nasal_func_stack.h
index 9753fd5..681f9f2 100644
--- a/version0.2/nasal_func_stack.h
+++ b/version0.2/nasal_func_stack.h
@@ -26,18 +26,13 @@ class func_stack
 		{
 			func_stack_unit *temp=head;
 			func_stack_unit *this_node=NULL;
-			if(head->next)
+			while(temp->next)
 			{
-				while(temp->next)
-				{
-					this_node=temp;
-					temp=temp->next;
-					delete this_node;
-				}
-				delete temp;
+				this_node=temp;
+				temp=temp->next;
+				delete this_node;
 			}
-			else
-				delete head;
+			delete temp;
 		}
 		void append_function(std::string &function_name,func &temp_func)
 		{
@@ -54,6 +49,7 @@ class func_stack
 			temp->next=new func_stack_unit;
 			temp=temp->next;
 			temp->next=NULL;
+			temp->func_name=function_name;
 			temp->func_statement=temp_func;
 			return;
 		}
@@ -80,7 +76,6 @@ class func_stack
 				temp=temp->next;
 				std::cout<<"function: "<<temp->func_name<<std::endl;
 			}
-			std::cout<<"function: "<<temp->func_name<<std::endl;
 			return;
 		}
 		void pop_function()
diff --git a/version0.2/nasal_functional.cpp b/version0.2/nasal_functional.cpp
index 29c9103..af0bb6f 100644
--- a/version0.2/nasal_functional.cpp
+++ b/version0.2/nasal_functional.cpp
@@ -122,27 +122,33 @@ func::~func()
 }
 func& func::operator=(const func& temp)
 {
-	token_unit *statement_temp=statement_head;
+	token_unit *statement_temp=statement_head->next;
 	token_unit *temp_state=temp.statement_head;
-	parameter *parameter_temp=parameter_head;
+	parameter *parameter_temp=parameter_head->next;
 	parameter *temp_param=temp.parameter_head;
 	
 	token_unit *statement_last=NULL;
 	parameter *parameter_last=NULL;
-	while(statement_temp->next)
+	if(statement_temp)
 	{
-		statement_last=statement_temp;
-		statement_temp=statement_temp->next;
-		delete statement_last;
+		while(statement_temp->next)
+		{
+			statement_last=statement_temp;
+			statement_temp=statement_temp->next;
+			delete statement_last;
+		}
+		delete statement_temp;
 	}
-	delete statement_temp;
-	while(parameter_temp->next)
+	if(parameter_temp)
 	{
-		parameter_last=parameter_temp;
-		parameter_temp=parameter_temp->next;
-		delete parameter_last;
+			while(parameter_temp->next)
+		{
+			parameter_last=parameter_temp;
+			parameter_temp=parameter_temp->next;
+			delete parameter_last;
+		}
+		delete parameter_temp;
 	}
-	delete parameter_temp;
 	statement_head->next=NULL;
 	parameter_head->next=NULL;
 	statement_temp=statement_head;
@@ -295,7 +301,7 @@ parse::parse()
 {
 	len=0;
 	content_array=new parse_unit[4096];
-	statement=new parse_unit[2048];
+	statement=new parse_unit[1024];
 }
 parse::~parse()
 {
@@ -310,17 +316,15 @@ void parse::content_array_set_empty()
 	{
 		content_array[i].line=0;
 		content_array[i].type=0;
-		content_array[i].content="";
 	}
 	return;
 }
 void parse::statement_set_empty()
 {
-	for(int i=0;i<2048;++i)
+	for(int i=0;i<1024;++i)
 	{
 		statement[i].line=0;
 		statement[i].type=0;
-		statement[i].content="";
 	}
 	return;
 }
@@ -361,19 +365,35 @@ void parse::brace_check()
 bool parse::def_function()
 {
 	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && statement[3].content=="func")
+	{
+		func temp_func;
+		nasal_func_stack.append_function(statement[1].content,temp_func);
 		return true;
+	}
 	return false;
 }
 bool parse::def_array()
 {
-	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && statement[3].content=="[")
+	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && statement[3].content=="[" && statement[4].content=="]")
+	{
+		var temp_var;
+		temp_var.type=VAR_LIST;
+		temp_var.data=new nasal_list;
+		nasal_var_stack.append_var(statement[1].content,temp_var);
 		return true;
+	}
 	return false;
 }
 bool parse::def_hash()
 {
-	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && statement[3].content=="{")
+	if(statement[0].content=="var" && statement[1].type==IDENTIFIER && statement[2].content=="=" && statement[3].content=="{" && statement[4].content=="}")
+	{
+		var temp_var;
+		temp_var.type=VAR_HASH;
+		temp_var.data=new nasal_hash;
+		nasal_var_stack.append_var(statement[1].content,temp_var);
 		return true;
+	}
 	return false;
 }
 bool parse::def_scalar()
diff --git a/version0.2/nasal_interpreter.cpp b/version0.2/nasal_interpreter.cpp
index 1c4dbd5..a3ed766 100644
--- a/version0.2/nasal_interpreter.cpp
+++ b/version0.2/nasal_interpreter.cpp
@@ -30,7 +30,9 @@ int main()
 		else if(command=="rs")
 			nasal::PrintSourceFile();
 		else if(command=="exit")
+		{
 			break;
+		}
 		else if(command=="lexer")
 			nasal::nasal_lexer.print();
 		else if(command=="del")
diff --git a/version0.2/nasal_print.h b/version0.2/nasal_print.h
index 6a6b734..8e48a3e 100644
--- a/version0.2/nasal_print.h
+++ b/version0.2/nasal_print.h
@@ -65,10 +65,10 @@ void PrintVar(var Var)
 		std::cout<<*((char *)Var.data);
 	else if(Var.type==VAR_STRING)
 		PrintString(*((std::string *)Var.data));
-//	else if(Var.type==VAR_LIST)
-//		((NasalList *)Var.data)->PrintList();
-//	else if(Var.type==VAR_HASH)
-//		((NasalHash *)Var.data)->PrintHash();
+	else if(Var.type==VAR_LIST)
+		;//((nasal_list *)Var.data)->print_list();
+	else if(Var.type==VAR_HASH)
+		;//((nasal_hash *)Var.data)->PrintHash();
 	else
 		std::cout<<"[Error] Null type or function";
 }
diff --git a/version0.2/nasal_var_stack.h b/version0.2/nasal_var_stack.h
index 8d97285..7965a3c 100644
--- a/version0.2/nasal_var_stack.h
+++ b/version0.2/nasal_var_stack.h
@@ -25,18 +25,13 @@ class var_stack
 		{
 			var_stack_unit *temp=head;
 			var_stack_unit *this_node=NULL;
-			if(head->next)
+			while(temp->next)
 			{
-				while(temp->next)
-				{
-					this_node=temp;
-					temp=temp->next;
-					delete this_node;
-				}
-				delete temp;
+				this_node=temp;
+				temp=temp->next;
+				delete this_node;
 			}
-			else
-				delete head;
+			delete temp;
 		}
 		void append_var(std::string& varia_name,var& temp_var)
 		{