using System;

public class Program

{

    public static void Main()

    {

        int introcredit,mathcredit,engcredit, intrograde, mathgrade, enggrade;

        float gpa;

        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) ;

 }

}

1.(x>=-10)&&(x<10)

2.(x=-100)||(x!=100)

3.(x>=0)&&(x<=100)  

4.(x>0)&&(x<100)

5.(x<0)||(x>100)

6.(x!100)&&(x!=10)

7.(x>-20)&&(x<0)

8.(x>=-20)&&(x<=20)

9.(x>5)&&(x<10)

10.(x>=20)&&(x<=80)

11.(x<-20)||(x>20)

12.(x!=20)||(x!=50)

13.(x>-9)&&(x!=0)

14.(x>80)&&(x<=100) 

15.(x<100)&&(x>=0)

16.(x>20)&&(X<30)

17.(x>=0)&&(x<=10)

  }

}

​