#include <iostream>
using namespace std;
#define SIZE 5
int stack[SIZE];
int top = -1;

// Function to push element
void push() {
    int value;
    if (top == SIZE - 1) {
        cout << "Stack Overflow!" << endl;
    } else {
        cout << "Enter value to push: ";
        cin >> value;
        top++;
        stack[top] = value;
        cout << "Element pushed successfully." << endl;
    }
}
// Function to pop element
void pop() {
    if (top == -1) {
        cout << "Stack Underflow!" << endl;
    } else {
        cout << "Popped element: " << stack[top] << endl;
        top--;
    }
}
// Function to display stack
void display() {
    if (top == -1) {
        cout << "Stack is empty." << endl;
    } else {
        cout << "Stack elements are: ";
        for (int i = top; i >= 0; i--) {
            cout << stack[i] << " ";
        }
        cout << endl;
    }
}
int main() {
    int choice;
    do {
        cout << "\n--- STACK OPERATIONS ---" << endl;
        cout << "1. Push" << endl;
        cout << "2. Pop" << endl;
        cout << "3. Display" << endl;
        cout << "4. Exit" << endl;
        cout << "Enter your choice: ";
        cin >> choice;

        switch (choice) {
            case 1: push(); break;
            case 2: pop(); break;
            case 3: display(); break;
            case 4: cout << "Exiting program."; break;
            default: cout << "Invalid choice!" << endl;
        }
    } while (choice != 4);

    return 0;
}