task 1( ds lab 4) 3rd sem

#include<bits/stdc++.h>
using namespace std;
int N;
void push(int s[],int &top,int item)
{
    if(top>=N)
        cout<<"Full"<<endl;
    else
    {
        s[top]=item;
        top++;
    }
}
int pop(int s[],int &top)
{
    if(top==0)
        cout<<"Empty"<<endl;
    else
    {
        --top;
        return s[top];
    }
}
int main()
{
    cin>>N;
    int t,i,ar[N],top=0,j;
    cin>>t;
    for(i=0; i<t; i++)
    {
        cout<<"Enter 1 to push and 2 to pop"<<endl;
        int a;
        cin>>a;
        if(a==1)
        {
            cout<<"Enter number"<<endl;
            int b;
            cin>>b;
            push(ar,top,b);
        }
        else
            pop(ar,top);
        cout<<"size= "<<top;
        cout<<" items= ";
        if(top==0)
            cout<<"NULL"<<endl;
        else
        {
            for(j=0; j<top; j++)
            {
                cout<<ar[j]<<" ";
            }
            cout<<"\n";
        }
    }
}