public static opov operator+(opov a, opov b)
{
opov sum = new opov();
sum.x = a.x + b.y;
sum.y = b.y + a.y;
return(sum);
}
static void Main(string[] args)
{
opov a = new opov(2, 4);
opov b = new opov(2, 4);
opov s = new opov(0, 0);
s = a + b;
Console.WriteLine(s);
//Console.WriteLine(opov.(a, b));
s.print();
}