Question

7. Test Average and Grade Write a program that asks the user to enter five test scores. The program should display a letter grade for each score and the average test score. Write the following methods in the program: calcAverage: This method should accept five test scores as arguments and return the average of the scores. determineGrade: This method should accept a test score as an argument and return a letter grade for the score, based on the following grading scale: Score Letter Grade 90-100 A 80-89 B 70-79 C 60-69 D Below 60 F

Answer 1

The code solution is written in Java.

1. import java.util.Scanner;
3. public class TestScore {
5. public static void main(String[] args) {
7. Scanner input = new Scanner(System.in);
9. System.out.print("Please enter first score: ");
10. double firstScore = input.nextDouble();
11. System.out.println("Grade: " + determineGrade(firstScore));
13. System.out.print("Please enter second score: ");
14. double secondScore = input.nextDouble();
15. System.out.println("Grade: " + determineGrade(secondScore));
17. System.out.print("Please enter third score: ");
18. double thirdScore = input.nextDouble();
19. System.out.println("Grade: " + determineGrade(thirdScore));
21. System.out.print("Please enter fourth score: ");
22. double fourthScore = input.nextDouble();
23. System.out.println("Grade: " + determineGrade(fourthScore));
25. System.out.print("Please enter fifth score: ");
26. double fifthScore = input.nextDouble();
27. System.out.println("Grade: " + determineGrade(fifthScore));
29. System.out.println("Average score: " + calcAverage(firstScore, secondScore, thirdScore, fourthScore, fifthScore));
31. }
33. public static double calcAverage(double score1, double score2, double score3, double score4, double score5){
34. double average = (score1 + score2 + score3 + score4 + score5) / 5;
35. return average;
36. }
38. public static String determineGrade(double score){
39. if(score >= 90){
40. return "A";
41. }
42. else if(score >= 80 ){
43. return "B";
44. }
45. else if(score >=70){
46. return "C";
47. }
48. else if(score >=60){
49. return "D";
50. }
51. else{
52. return "F";
53. }
54. }
55. }

Step-by-step explanation:

Firstly, create the method, calcAverage(), that takes five test scores. Within the method, calculate the average and return it as output. (Line 33 - 36)

Next, create another method, determineGrade(), which takes only one score and return the grade based on the range of the score. (Line 38 -54)

Once the two required methods are created, we are ready to prompt use for input five test scores using Java Scanner class. To use get user input, create a Scanner object (Line 7). Next, use getDouble() method to get an input score and assign it to variables firstScore, secondScore, thirdScore, fourthScore & fifthScore, respectively. Once a score input by user, call determineGrade() method by passing the input score as argument and immediately print out the return grade. (Line 9 - 27)

At last, call calcAverage() method by passing the first test score variables as argument and print out the returned average value. (Line 29).