public static void Main(string [] ar)
{
overload obj = new overload();
Console.WriteLine(obj.add(10, 20, 30)); //call to 2
Console.WriteLine(obj.add(10.5, 90)); //call to 3
Console.WriteLine(obj.add(10.5, 20.9)); //call to 5
Console.WriteLine(obj.add(9, 10.5)); //call to 4
Console.WriteLine(obj.add(10, 20)); //call to 1
Console.WriteLine(obj.add(10)); //call to 1
}