1.stack.cpp

#include<iostream>
#include<stack>
#include<stdlib.h>
using namespace std;
int main()
{
    stack<int>S;
    for(int i=0;i<5;i++)
    {
        int x=rand()%100;
        cout<<"Push: "<<x<<endl;
        S.push(x);
    }

    cout<<"Stack size: "<<S.size()<<endl;

    cout<<"Top element: "<<S.top()<<endl;

    S.pop();

    cout<<"After pop top element: "<<S.top()<<endl;

    while(!S.empty())S.pop();

    cout<<"Is stack empty: "<<S.empty()<<endl;

    return 0;
}

2. output

Push: 83
Push: 86
Push: 77
Push: 15
Push: 93
Stack size: 5
Top element: 93
After pop top element: 15
Is stack empty: 1