/* NestedAlt.java: Alternate version of NestedControlStructure.java
   taken from textbook:
   Java Programming: From Problem Analysis to Program Design
   by D.S. Malik and P.S. Nair, Thomson Course Technology, 2003

   Modified by Craig Persiko
*/

import java.util.Scanner;


public class NestedAlt
{
   public static void main(String[] args)
   {
      Scanner keyboard = new Scanner (System.in);
      String studentId;
      int    testScore;
      int    count = 0;

      do
      {
        System.out.print("Enter student ID "
                         + "(Enter ZZZ to end): ");
        studentId = keyboard.nextLine();
        System.out.println();
        if(studentId.equals("ZZZ"))
          break;  // exit the loop


        count++;
        System.out.print("Enter test score: ");
        testScore = keyboard.nextInt();
        keyboard.nextLine(); // dispose of newline character

        System.out.println();

        System.out.print("Student Id = " + studentId
                          + ", test score = "
                          + testScore + ", and grade = ");
        if(testScore >= 90)
          System.out.println("A.");
        else if(testScore >= 80)
          System.out.println("B.");
        else if(testScore >= 70)
          System.out.println("C.");
        else if(testScore >= 60)
          System.out.println("D.");
        else
          System.out.println("F.");
      }while(true);  // we break if studentId.equals("ZZZ")


      System.out.println("\nStudents in class = " + count);
    }
}

/*  Sample Output:

Enter student ID (Enter ZZZ to end): 1

Enter test score: 75

Student Id = 1, test score = 75, and grade = C.
Enter student ID (Enter ZZZ to end): 50

Enter test score: 95

Student Id = 50, test score = 95, and grade = A.
Enter student ID (Enter ZZZ to end): zzz

Enter test score: 88

Student Id = zzz, test score = 88, and grade = B.
Enter student ID (Enter ZZZ to end): ZZZ


Students in class = 3

*/