#include <iostream>
using namespace std;
class Node {
public :
int data;
Node *next;
Node() {
data = 0;
next = NULL;
}
Node(int data) {
this->data = data;
this->next = NULL;
}
};
class Stack {
Node *top;
public :
void push(int data);
void pop();
void peek();
void display();
bool isEmpty();
};
bool Stack::isEmpty() {
if(top == NULL) {
return true;
}
return false;
}
void Stack::push(int data) {
Node *newNode = new Node(data);
if(top == NULL) {
top = newNode;
return;
}
newNode->next = top;
top = newNode;
}
void Stack::pop() {
if(top == NULL) {
cout << "Stack is Empty" << endl ;
}
Node *temp = top;
top= top->next;
cout << "Pop : " << temp->data << endl;
delete temp;
}
void Stack::peek() {
if(top == NULL) {
cout << "Stack is Empty" << endl ;
}
cout << "Peep : " << top->data << endl;
}
void Stack::display() {
if(top == NULL) {
cout << "Stack is Empty" << endl ;
}
Node *temp = top;
while(temp != NULL) {
cout << temp->data << endl;
temp = temp->next;
}
}
int main() {
Stack *stack = new Stack();
stack->push(1);
stack->push(2);
stack->push(3);
stack->push(4);
stack->display();
stack->pop();
stack->peek();
stack->display();
stack->push(5);
stack->display();
return 0;
}
