public Chon (string a , double b , double c)
public static void Main()
Chon h = new Chon("Chonthicha Srisukong",16,3.66);
Console.WriteLine("My name is {0}",h.name);
Console.WriteLine("I am {0} years old",h.old);
Console.WriteLine("My GPA is {0}",h.GPA);