C++ Graph class Implementation : Without any STL package

Hi All,

Please find the implementation for Graph class in C++ without using any STL reference.
Let me know if you find any issues with it.

Header file.

	#ifndef GRAPH_H
	#define GRAPH_H
	#include <iostream>
	class Node {
	int val;
	Node *next;
	public:
	Node(int v){
	this->val = v;
	this->next = NULL;
	}
	Node* Next(){
	return next;
	}
	void setNext(Node *temp)
	{
	this->next = temp;
	}
	int getVal() {
	return val;
	}
	};
	class List {
	Node *head;
	public:
	List(){
	head = NULL;
	}
	Node* getHead(){
	return head;
	}
	void add(int val)
	{
	Node* temp = new Node(val);
	if(head == NULL)
	head = temp;
	else {
	Node *t = head;
	while(t->Next() != NULL)
	t = t->Next();
	t->setNext(temp);
	}
	}
	};
	template<class T, int size=100>
	class Stack
	{
	T stack[size];
	int top;
	public:
	Stack() {
	top = 0;
	}
	void push(T& a){
	stack[top++] = a;
	}
	T pop(){
	return stack[--top];
	}
	int size(){
	return top;
	}
	};
	class Graph {
	int V;
	List *list;
	public:
	Graph(int V){
	this->V = V;
	list = new List[V];
	}
	void addEdge(int u, int v)
	{
	list[u].add(v);
	}
	void print()
	{
	for(int i=0;i<V;i++)
	{
	Node *temp = list[i].getHead();
	std::cout << i << " -> ";
	while(temp != NULL)
	{
	std::cout << temp->getVal() << " ";
	temp = temp->Next();
	}
	std::cout << std::endl;
	}
	}
	};
	#endif

view raw graph.h hosted with ❤ by GitHub

Cpp file:

	#include <iostream>
	#include "Graph.h"
	using namespace std;
	int main()
	{
	// create the graph given in above fugure
	int V = 5;
	Graph* graph = new Graph(V);
	graph->addEdge(0,1);
	graph->addEdge(0, 4);
	graph->addEdge(1, 2);
	graph->addEdge(1, 3);
	graph->addEdge(1, 4);
	graph->addEdge(2, 3);
	graph->addEdge(3, 4);
	// print the adjacency list representation of the above graph
	graph->print();
	return 0;
	}

view raw Graph.cpp hosted with ❤ by GitHub

Happy Coding !!