C++ Different Function

#include<iostream>
using namespace std;

void anik()
{
    int a, s;
    cout << "Enter A Number :: ";
    cin >> a;
    cout << endl;

    s = a*a;

    cout << "Square is :: " << s << endl << endl;
}

int main()
{
    anik();
    anik();
    anik();

    return 0;
}