stack-array-simple

#include <iostream>

using namespace std;

int *s;
int head=0;

void push (int x){
    head++;
    s[head]=x;
}

int pop(){
     head--;
     return s[head+1];
}
int peek(){
    return s[head];
}
int main()
{
    s = new int[1000];
    s[0]=0;
    push(1);
    push(2);
    push(3);
    cout<<pop()<<endl;
    cout<<pop()<<endl;
    cout<<pop()<<endl;
    return 0;
}