public static void Main()
int introcredit,mathcredit,engcredit, intrograde, mathgrade, enggrade;
Console.WriteLine("กรอกหน่วยกิจ Intro");
introcredit = Convert .ToInt16(Console . ReadLine());
Console.WriteLine("กรอกเกรด Math");
introcredit = Convert .ToInt16(Console . ReadLine());
Console.WriteLine("กรอกหน่วยกิต Math");
introcredit = Convert .ToInt16(Console . ReadLine());
Console.WriteLine("กรอกเกรด Eng");
introcredit = Convert .ToInt16(Console . ReadLine());
Console.WriteLine("กรอกเกรด Eng");
mathgrade = Convert . ToInt16(Console . ReadLine());
gpa=(introcredit*intrograde+mathcredit*mathgrade+engcredit*enggrede)/(introcredit+mathcredit);
Console.WriteLine("GPA = "+gpa) ;