C++ is such a beautiful language! I'm simply starting to love it :) Do you know if there are some free online books about coding in c++ availible on the internet? If you know about any, I'd be most grateful if you give me a link. Thanks in advance! :)

#include <iostream.h>

void main()
{
    short int n;
    cin >> n;
    cout << ((n>0?n*n:2-n*n)+n)/2;
}

// Enjoy :)