Heart/Cuore Valentine's Day/San Valentino

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    double x, y, size=10;
    char ch=3;
    string message("     Buon San Valentino!!!");

    int print_line = 4;

    if (message.length() % 2 != 0) message += " ";

    for (x=0;x<size;x++)
    {
        for (y=0;y<=4*size;y++)
        {
            double dist1 = sqrt( pow(x-size,2) + pow(y-size,2) );
            double dist2 = sqrt( pow(x-size,2) + pow(y-3*size,2) );

            if (dist1 < size + 0.5 || dist2 < size + 0.5 ) {
                cout << ch;
            }
            else cout << " ";
        }
        cout<<"\n";
    }

    for (x=1;x<2*size;x++)
    {
        for(y=0;y<x;y++) cout << " ";

        for (y=0; y<4*size + 1 - 2*x; y++)
        {
            if (x >= print_line - 1 && x <= print_line + 1) {
                int idx = y - (4*size - 2*x - message.length()) / 2;
                if (idx < message.length() && idx >= 0) {
                    if (x == print_line) cout<<message[idx];
                    else cout << " ";
                }
                else cout << ch;
            }
            else cout << ch;
        }
        cout<<endl;
    }
return 0;
}