diff --git a/version0.2/nasal_functional.cpp b/version0.2/nasal_functional.cpp
index 3be7cac..643a505 100644
--- a/version0.2/nasal_functional.cpp
+++ b/version0.2/nasal_functional.cpp
@@ -1,4 +1,32 @@
 #ifndef __NASAL_FUNCTIONAL_CPP__
 #define __NASAL_FUNCTIONAL_CPP__
 
+#include "nasal_functional.h"
+
+func::func()
+{
+	statement_head=new token_unit;
+	statement_head->line=0;
+	statement_head->type=FUNC_BEGIN;
+	statement_head->content="__func_begin";
+	statement_head->next=NULL;
+	
+	parameter_head=new parameter;
+	parameter_head->param_var.type=VAR_NONE;
+	parameter_head->param_var.data=NULL;
+	parameter_head->next=NULL;
+}
+func::func(const func& temp)
+{
+	;
+}
+func::~func()
+{
+	;
+}
+func& func::operator=(const func& temp)
+{
+	return *this;
+}
+
 #endif
diff --git a/version0.2/nasal_functional.h b/version0.2/nasal_functional.h
index 0372be3..dd53185 100644
--- a/version0.2/nasal_functional.h
+++ b/version0.2/nasal_functional.h
@@ -1,6 +1,8 @@
 #ifndef __NASAL_FUNCTIONAL_H__
 #define __NASAL_FUNCTIONAL_H__
 
+#include "nasal_var.h"
+
 #define FUNC_BEGIN       0
 #define FUNC_OPERATOR    1
 #define FUNC_IDENTIFIER  2
@@ -16,13 +18,22 @@ struct token_unit
 	token_unit *next;
 };
 
+struct parameter
+{
+	var param_var;
+	parameter *next;
+};
+
 class func
 {
 	private:
-		token_unit *head;
+		token_unit *statement_head;
+		parameter *parameter_head;
 	public:
 		func();
+		func(const func&);
 		~func();
+		func& operator=(const func&);
 };
 
 class token_list
diff --git a/version0.2/nasal_hash.cpp b/version0.2/nasal_hash.cpp
index de379a9..7eb376b 100644
--- a/version0.2/nasal_hash.cpp
+++ b/version0.2/nasal_hash.cpp
@@ -1,17 +1,113 @@
 #ifndef __NASAL_HASH_CPP__
 #define __NASAL_HASH_CPP__
 
+
+#include "nasal_hash.h"
+
 nasal_hash::nasal_hash()
 {
-	;
+	head=new nasal_hash_unit;
+	head->name="";
+	head->hash_var.type=VAR_NONE;
+	head->hash_var.data=NULL;
+	head->next=NULL;
 }
 nasal_hash::~nasal_hash()
 {
-	;
+	nasal_hash_unit *temp=head;
+	nasal_hash_unit *this_node=NULL;
+	while(temp->next)
+	{
+		this_node=temp;
+		temp=temp->next;
+		delete this_node;
+	}
+	delete temp;
 }
-nasal_hash& nasal_hash::operator=(const nasal_hash &temp)
+nasal_hash& nasal_hash::operator=(const nasal_hash &p)
 {
+	nasal_hash_unit *temp=head;
+	nasal_hash_unit *this_node=NULL;
+	if(head->next)
+	{
+		temp=temp->next;
+		head->next=NULL;
+		while(temp->next)
+		{
+			this_node=temp;
+			temp=temp->next;
+			delete this_node;
+		}
+		delete temp;
+	}
+	temp=head;
+	nasal_hash_unit *temp_p=p.head;
+	
+	while(temp_p->next)
+	{
+		temp_p=temp_p->next;
+		temp->next=new nasal_hash_unit;
+		temp=temp->next;
+		temp->next=NULL;
+		temp->hash_var=temp_p->hash_var;
+		temp->name=temp_p->name;
+	}
 	return *this;
 }
+void nasal_hash::append(std::string& var_name,var& p)
+{
+	nasal_hash_unit *temp=head;
+	while(temp->next)
+		temp=temp->next;
+	temp->next=new nasal_hash_unit;
+	temp=temp->next;
+	temp->next=NULL;
+	temp->hash_var=p;
+	temp->name=var_name;
+	return;
+}
+int nasal_hash::contains(std::string& var_name)
+{
+	nasal_hash_unit *temp=head;
+	while(temp->next)
+	{
+		temp=temp->next;
+		if(temp->name==var_name)
+			return 1;
+	}
+	return 0;
+}
+int nasal_hash::delete_element(std::string& var_name)
+{
+	nasal_hash_unit *temp=head;
+	nasal_hash_unit *last_node=NULL;
+	while(temp->next)
+	{
+		last_node=temp;
+		temp=temp->next;
+		if(temp->name==var_name)
+		{
+			last_node->next=temp->next;
+			delete temp;
+			return 1;
+		}
+	}
+	return 0;
+}
+nasal_list nasal_hash::keys()
+{
+	var assist_var;
+	assist_var.type=VAR_STRING;
+	nasal_list temp_list;
+	nasal_hash_unit *temp=head;
+	while(temp->next)
+	{
+		temp=temp->next;
+		assist_var.data=new std::string;
+		*((std::string *)assist_var.data)=temp->name;
+		temp_list.append(assist_var);
+	}
+	return temp_list;
+}
 
 #endif
diff --git a/version0.2/nasal_hash.h b/version0.2/nasal_hash.h
index 5773e9a..b28f4d4 100644
--- a/version0.2/nasal_hash.h
+++ b/version0.2/nasal_hash.h
@@ -1,12 +1,12 @@
 #ifndef __NASAL_HASH_H__
 #define __NASAL_HASH_H__
 
+#include "nasal_var.h"
 
 struct nasal_hash_unit
 {
 	std::string name;
-	std::string type;
-	void *data;
+	var hash_var;
 	nasal_hash_unit *next;
 };
 
@@ -18,9 +18,7 @@ class nasal_hash
 		nasal_hash();
 		~nasal_hash();
 		nasal_hash& operator=(const nasal_hash&);
-		void append_var(var&);
-		void append_list(nasal_list&);
-		void append_hash(nasal_hash&);
+		void append(std::string&,var&);
 		int contains(std::string&);
 		int delete_element(std::string&);
 		nasal_list keys();
diff --git a/version0.2/nasal_interpreter.cpp b/version0.2/nasal_interpreter.cpp
index 93e3fe5..8be3772 100644
--- a/version0.2/nasal_interpreter.cpp
+++ b/version0.2/nasal_interpreter.cpp
@@ -1,9 +1,43 @@
 #include <iostream>
 #include <cstring>
+#include <cstdlib>
 #include "nasal.h"
 
 int main()
 {
+	nasal::nasal_list m;
+	nasal::nasal_hash n;
+	nasal::var k;
+	k.type=VAR_STRING;
+	k.data=new std::string;
+	*((std::string *)k.data)="hello";
+	m.append(k);
+	m.pop();
 	
+	std::string command;
+	std::cout<<">> input \"help\" to find help."<<std::endl;
+	while(1)
+	{
+		std::cout<<">> ";
+		std::cin>>command;
+		if(command=="help")
+		{
+			std::cout<<">> 1.input file name to run the nasal script."<<std::endl;
+			std::cout<<">> 2.command cls to clear the screen."<<std::endl;
+			std::cout<<">> 3.command exit to shut down the program."<<std::endl;
+		}
+		else if(command=="cls")
+		{
+			system("cls");
+			//linux system("clear");
+			//macOS system(clear");
+		}
+		else if(command=="exit")
+			break;
+		else
+		{
+			;
+		}
+	}
 	return 0;
 }
diff --git a/version0.2/nasal_interpreter.exe b/version0.2/nasal_interpreter.exe
new file mode 100644
index 0000000..1f00d5c
Binary files /dev/null and b/version0.2/nasal_interpreter.exe differ
diff --git a/version0.2/nasal_list.cpp b/version0.2/nasal_list.cpp
index 5b8cd1f..5af51b9 100644
--- a/version0.2/nasal_list.cpp
+++ b/version0.2/nasal_list.cpp
@@ -1,17 +1,192 @@
 #ifndef __NASAL_LIST_CPP__
 #define __NASAL_LIST_CPP__
 
+#include "nasal_var.h"
+#include "nasal_list.h"
+
 nasal_list::nasal_list()
 {
-	;
+	head=new nasal_list_unit;
+	head->list_var.type=VAR_NONE;
+	head->list_var.data=NULL;
+	head->next=NULL;
 }
 nasal_list::~nasal_list()
 {
-	;
+	nasal_list_unit *temp=head;
+	nasal_list_unit *this_node=NULL;
+	while(temp->next)
+	{
+		this_node=temp;
+		temp=temp->next;
+		delete this_node;
+	}
+	delete temp;
 }
-nasal_list& nasal_list::operator=(const nasal_list &temp)
+nasal_list& nasal_list::operator=(const nasal_list &p)
 {
+	nasal_list_unit *temp=head;
+	nasal_list_unit *this_node=NULL;
+	if(head->next)
+	{
+		temp=temp->next;
+		head->next=NULL;
+		while(temp->next)
+		{
+			this_node=temp;
+			temp=temp->next;
+			delete this_node;
+		}
+		delete temp;
+	}
+	temp=head;
+	nasal_list_unit *temp_p=p.head;
+	
+	while(temp_p->next)
+	{
+		temp_p=temp_p->next;
+		temp->next=new nasal_list_unit;
+		temp=temp->next;
+		temp->next=NULL;
+		temp->list_var=temp_p->list_var;
+	}
 	return *this;
 }
+void nasal_list::append(var& p)
+{
+	nasal_list_unit *temp=head;
+	while(temp->next)
+		temp=temp->next;
+	temp->next=new nasal_list_unit;
+	temp=temp->next;
+	temp->next=NULL;
+	temp->list_var=p;
+	return;
+}
+void nasal_list::setsize(const int list_size)
+{
+	nasal_list_unit *temp=head;
+	int cnt=0;
+	while(temp->next)
+	{
+		temp=temp->next;
+		++cnt;
+		if(cnt==list_size)
+		{
+			nasal_list_unit *this_node=NULL;
+			nasal_list_unit *t=temp->next;
+			temp->next=NULL;
+			if(!t)
+				return;
+			while(t->next)
+			{
+				this_node=t;
+				t=t->next;
+				delete this_node;
+			}
+			delete t;
+			return;
+		}
+	}
+	while(cnt<list_size)
+	{
+		temp->next=new nasal_list_unit;
+		temp=temp->next;
+		temp->list_var.type=VAR_NONE;
+		temp->list_var.data=NULL;
+		temp->next=NULL;
+		++cnt;
+	}
+	return;
+}
+nasal_list nasal_list::subvec(const int list_begin=0,const int list_end=-1)
+{
+	nasal_list temp_list;
+	int cnt=-1;
+	nasal_list_unit *temp=head;
+	
+	int beg=list_begin;
+	int end=list_end;
+	if(list_end==-1)
+	{
+		int end_place=-1;
+		while(temp->next)
+		{
+			temp=temp->next;
+			++end_place;
+		}
+		temp=head;
+		end=end_place;
+	}
+	while(temp->next)
+	{
+		temp=temp->next;
+		++cnt;
+		if(beg<=cnt && cnt<=end)
+			temp_list.append(temp->list_var);
+	}
+	return temp_list;
+}
+var nasal_list::pop()
+{
+	nasal_list_unit *temp=head;
+	nasal_list_unit *this_node;
+	while(temp->next)
+	{
+		this_node=temp;
+		temp=temp->next;
+	}
+	this_node->next=NULL;
+	var temp_var=temp->list_var;
+	delete temp;
+	return temp_var;
+}
+nasal_list nasal_list::sort_list(const int sort_type,bool cmp_rule=true)
+{
+	nasal_list temp_list;
+	if(sort_type==SORT_INT)
+	{
+		nasal_list_unit *temp=head;
+		while(temp->next)
+		{
+			temp=temp->next;
+			if(temp->list_var.type!=VAR_LLINT)
+			{
+				std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be long int."<<std::endl;
+				temp_list.setsize(1);
+				return temp_list;
+			}
+		}
+		if(temp->list_var.type!=VAR_LLINT)
+		{
+			std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be long int."<<std::endl;
+			temp_list.setsize(1);
+			return temp_list;
+		}
+		temp_list=*this;
+	}
+	else if(sort_type==SORT_STR)
+	{
+		nasal_list_unit *temp=head;
+		while(temp->next)
+		{
+			temp=temp->next;
+			if(temp->list_var.type!=VAR_STRING)
+			{
+				std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be string."<<std::endl;
+				temp_list.setsize(1);
+				return temp_list;
+			}
+		}
+		if(temp->list_var.type!=VAR_STRING)
+		{
+			std::cout<<"[Error] Incorrect type inside: "<<temp->list_var.type<<".But type must be string."<<std::endl;
+			temp_list.setsize(1);
+			return temp_list;
+		}
+		temp_list=*this;
+	}
+	return temp_list;
+}
 
 #endif
diff --git a/version0.2/nasal_list.h b/version0.2/nasal_list.h
index b749936..6a143d8 100644
--- a/version0.2/nasal_list.h
+++ b/version0.2/nasal_list.h
@@ -1,12 +1,16 @@
 #ifndef __NASAL_LIST_H__
 #define __NASAL_LIST_H__
 
+#include "nasal_var.h"
+
+#define SORT_INT 1
+#define SORT_STR 2
+
 class nasal_hash;
 
 struct nasal_list_unit
 {
-	std::string type;
-	void *data;
+	var list_var;
 	nasal_list_unit *next;
 };
 
@@ -18,13 +22,11 @@ class nasal_list
 		nasal_list();
 		~nasal_list();
 		nasal_list& operator=(const nasal_list&);
-		void append_var(var&);
-		void append_list(nasal_list&);
-		void append_hash(nasal_hash&);
+		void append(var&);
 		void setsize(const int);
 		nasal_list subvec(const int,const int);
 		var pop();
-		void sort_list(bool);
+		nasal_list sort_list(const int,bool);
 };
 
 #endif
diff --git a/version0.2/nasal_var.cpp b/version0.2/nasal_var.cpp
index 76e1b38..813b62d 100644
--- a/version0.2/nasal_var.cpp
+++ b/version0.2/nasal_var.cpp
@@ -38,6 +38,10 @@ var::var(const var &temp)
 			data=new nasal_hash;
 			*((nasal_hash *)data)=*((nasal_hash *)temp.data);
 			break;
+		case VAR_FUNC:
+			data=new func;
+			*((func *)data)=*((func *)temp.data);
+			break;
 	}
 }
 var::~var()
@@ -63,6 +67,9 @@ var::~var()
 			case VAR_HASH:
 				delete (nasal_hash *)data;
 				break;
+			case VAR_FUNC:
+				delete (func *)data;
+				break;
 		}
 }
 var& var::operator=(const var &temp)
@@ -88,6 +95,9 @@ var& var::operator=(const var &temp)
 			case VAR_HASH:
 				delete (nasal_hash *)data;
 				break;
+			case VAR_FUNC:
+				delete (func *)data;
+				break;
 		}
 	type=temp.type;
 	switch(type)
@@ -119,6 +129,10 @@ var& var::operator=(const var &temp)
 			data=new nasal_hash;
 			*((nasal_hash *)data)=*((nasal_hash *)temp.data);
 			break;
+		case VAR_FUNC:
+			data=new func;
+			*((func *)data)=*((func *)temp.data);
+			break;
 	}
 	return *this;
 }
diff --git a/version0.2/nasal_var.h b/version0.2/nasal_var.h
index 21822cb..50972fc 100644
--- a/version0.2/nasal_var.h
+++ b/version0.2/nasal_var.h
@@ -8,6 +8,7 @@
 #define VAR_STRING 4
 #define VAR_LIST   5
 #define VAR_HASH   6
+#define VAR_FUNC   7
 
 class var
 {