Question

Create a GPA calculator in Java. Ask the end user for the credit hours and letter grade for each class. Once the user is finished with the data entry, calculate and output the overall GPA for the given input.

For example, if four classes are input, each of which is a three-hour course, with grades of A, B, B, and B, the overall GPA will be 3.25.

The exact user interaction is up to you. As long as the requirements above are met, the code is readable (and properly documented), and the application is user-friendly.

Letter Grade

Grade Point Value per Credit Hour

A-4

B-3

C-2

D-1

F-0

And the semester GPA is the total grade points divided by total credit hours.

Answer 1

Code:

import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
       Scanner input=new Scanner(System.in); //Scanner class object creation
       int total=0;
       int total_credit_hours=0; //declaring variables
       while (true)
       {
       System.out.print("Enter the Credit Hours and Grade (Press -1 and Q to exit): "); //asking user to enter data for exit press -1 and Q
       int credit_hours=input.nextInt();
       char grade=input.next().charAt(0); //take credit_hours and grade as input
if (credit_hours==-1 && grade=='Q') //if credit hours is -1 then break
break;
switch(grade) //switch case
       {
       case 'A': total=total+(credit_hours * 4); // if grade is A multiply with 4
       break ;
      
       case 'B': total=total+(credit_hours * 3); //if b multiply with 3
       break ;
       case 'C': total=total+(credit_hours * 2); //if c multiply with 2
       break ;
       case 'D': total=total+(credit_hours * 1); //if d multiply with 1
       break ;
       case 'E': total=total+(credit_hours * 0); //if e multiply with 0
       break ;
       default:
       break;
       }
total_credit_hours=total_credit_hours+credit_hours; //sum of total hours
       }
       float overall_gpa=total/(float)(total_credit_hours); //overall_gpa calculation
       System.out.println("The overall GPA will be: " + overall_gpa); //printing overall gpa
   }
}

Code Screenshots and Output:

Note: if you have any queries please post a comment thanks a lot..always available to help you...