Worksheet: Switch Statements

1. Given the following switch statement:

    System.out.println("enter the grade:  ");
    grStr = keyboard.next();
    grade = grStr.charAt(0);
    switch (grade)
    {
	case 'A':
	case 'B':
            System.out.println("good work");
            break;
	case 'C':
            System.out.println("average work");
            break;
	case 'D':
            System.out.println("just passing");
            break;
	case 'F':
            System.out.println("poor work");
            failing++;
            break;
    }

What would be printed if the grade were:
   A. A
   B. D
   C. b


2. Modify the switch statement in question 1 so that it prints an
   error message if an invalid grade is entered.


3. Modify the switch statement in question 1 so that it works for grades
   entered as uppercase or lowercase letters.


4. A. Write the equivalent if/else statements for the program segment
      in Question # 1.
   B. If you were guaranteed that only VALID grades would be entered
      by the user, could the if/else statement be written any
      differently? If so, how?


5. Show the output of the following:

    int1 = 4;
    switch (int1) {
        case 1:
            System.out.println(4);
            break;
        case 2:
            System.out.println(1);
            break;
        case 3:
            System.out.println(7);
            break;
        case 4:
            System.out.println(9);
            break;
        case 5:
            System.out.println(6);
            break;
    }


6. Show the output of the following:

    int1 = 4;
    switch (int1) {
       case 1:
           System.out.println(4);
           break;
       case 2:
           System.out.println(1);
           break;
       case 3:
           System.out.println(7);
           break;
       case 2:
           System.out.println(9);
           break;
       case 5:
           System.out.println(6);
           break;
    }


7. Show the output of the following:

    int1 = 4;
    switch (int1) {
       case 1:
           System.out.println(4);
           break;
       case 2:
           System.out.println(1);
           break;
       case 3:
           System.out.println(7);
           break;
       case 4:
           System.out.println(9);
       case 5:
           System.out.println(6);
    }


8. An electronics store is having a sale. Items from the audio department
   (dept code 310) are 10% off. Items from the video department (dept
   code 438) are 12% off. Items from the computer department (dept
   code 284) are 8% off, and items from the communications department
   (dept code 652) are 15% off. Items from other departments are 5%
   off. Write the statements to read in the regular price of an item and
   the dept code, and calculate the sale price. Print the regular price
   and the sale price. Use a nested if statement.


9. Rewrite your code from problem 8 using a switch statement.

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