public static complex operator +(complex C1, complex c2)
{
complex c = new complex();
c.number = C1.number + c2.number;
return(c);
}
static void Main(string[] args)
{
printhello();
printhello("world");
complex c1 = new complex();
complex c2 = new complex();
c1.number = 2;
c2.number = 5;
Console.WriteLine((c1 + c2).number);
human human1 = new man();
human human2 = new woman();
human1.cleanroom();
human2.cleanroom();
Console.WriteLine(c2.ToString());
Console.WriteLine();
}
