Question

1. Declare and initialize 4 Constants for the course category weights:
   1. The weight of Homework will be 15%
   2. The weight of Tests will be 35%
   3. The weight of the Mid term will be 20%
   4. The weight of the Fin al will be 30%
      • Remember to name your Constants according to Java standards.
2. Declare a variable to store the input for the number of homework scores and use a Scanner method to read the value from the Console.
3. Declare two variables: one to act as a counter for the while loop condition and the other to hold the sum of the scores entered. Create a while loop with a condition to read in the scores.
   • Inside the while loop, increase your counter variable and add to your sum variable.
4. Using only existing variables, calculate the homework average. No *magic numbers here - use those existing variables.
5. Declare a variable to store the input for the number of test scores and use a Scanner method to read the value from the Console.
6. Declare two variables: one to act as a counter for the while loop condition and the other to hold the sum of the scores entered. Create a while loop with a condition to read in the scores.
   • Inside the while loop, increase your counter variable and add to your sum variable.
7. Using only existing variables, calculate the test average. No *magic numbers here - use those existing variables.
8. Declare a variable to store the input for the mid-term exam score and use a Scanner method to read the value from the Console. No loop needed because there is only one score.
9. Declare a variable to store the input for the fin al ex am score and use a Scanner method to read the value from the Console. No loop needed.
10. Using only existing variables and constants, calculate the overall grade average. No *magic numbers here - use those existing variables and constants.  Grades are determined by category average * category weight for all four categories.
11. Determine the letter grade that corresponds to the numerical grade average using an if/else decision statement. You will see that you need only write the conditions for some letter grades, while you must write the entire block of code for other letter grades. Make sure you have a choice for A, B, C, D, and F.
12. Output the grade average using a printf statement to format your output (see Sample output).  
13. Output the letter grade (see Sample output).
14. Determine the final message to output using an if/else statement. Students should only advance to the next course if their grade is an A, B, or C. Otherwise they must repeat the course.

Decisions and Loops The following are sample runs of the program to help you write your code and format your output: Sample Output 1: How many homework scores to enter?: 4 <--The red font indicates input that will be provided in Code Check testing Enter homework score #1: 94.6 <--Only the lines in black font would be output by you Enter homework score #2: 82 Enter homework score #3: 78.1 Enter homework score #4: 98 How many test scores to enter?: 3 Enter test score #1: 88 Enter test score #2: 78.8 Enter test score #3: 84.3 Enter Midterm exam score: 82.6 Enter Final exam score: 90 Grade Average: 86.04 Letter grade: B Good job! You can advance to the next course. ----GRASP: operation complete. Sample Output 2: How many homework scores to enter?: 5 Enter homework score #1: 78 Enter homework score #2: 74.2 Enter homework score #3: 98.1 Enter homework score #4: 92.4 Enter homework score #5: 89 How many test scores to enter?: 2 Enter test score #1: 92.3 Enter test score #2: 97 Enter Midterm exam score: 88.2 Enter Final exam score: 91.4 Grade Average: 91.14 Letter grade: A Good job! You can advance to the next course. -jGRASP: operation complete.

Answer 1

CODE IN JAVA:

import java.util.Scanner ;
public class TestScores {

   public static void main(String[] args) {
       int homeworkWeight = 15, testWeight = 35, midWeight = 20, finalWeight = 30 ;
       Scanner sc = new Scanner(System.in);
       System.out.print("How many homework scores to enter? ");
       int numberOfHomeworks = sc.nextInt();
       int i = 1 ;
       double homeworkScore, totalHomeworkScores = 0, homeworkAvg ;
       while(i <= numberOfHomeworks) {
          
           System.out.print("Enter homework score #" + i + ": ");
           homeworkScore = sc.nextDouble();
           totalHomeworkScores += homeworkScore ;
           i += 1 ;
       }
       homeworkAvg = totalHomeworkScores / numberOfHomeworks ;
       System.out.print("How many test scores to enter? ");
       int numberOfTestScores = sc.nextInt();
       i = 1 ;
       double testScore, totalTestScores = 0, testScoreAvg ;
       while(i <= numberOfTestScores) {
          
           System.out.print("Enter test score #" + i + ": ");
           testScore = sc.nextDouble();
           totalTestScores += testScore ;
           i += 1 ;
       }
       testScoreAvg = totalTestScores / numberOfTestScores ;
       System.out.print("Enter Mid score: ");
       double mid = sc.nextDouble();
       System.out.print("Enter Final score : ");
       double finalEx = sc.nextDouble();
      
       double finalScore = (homeworkAvg * homeworkWeight / 100) + (testScoreAvg * testWeight / 100) + (mid * midWeight / 100) + (finalEx * finalWeight / 100);
       System.out.println("Grade Average: " + finalScore);
       if(finalScore >= 90) {
           System.out.println("Letter grade : A");
           System.out.println("Good job! You can advance to the next course.");
       }
       else if(finalScore >= 80) {
           System.out.println("Letter grade : B");
           System.out.println("Good job! You can advance to the next course.");
       }
       else if(finalScore >= 70) {
           System.out.println("Letter grade : C");
           System.out.println("Good job! You can advance to the next course.");
       }
       else if(finalScore >= 60) {
           System.out.println("Letter grade : D");
           System.out.println("I'm sorry. You will have to repeat the course before advancing.");
       }
       else {
           System.out.println("Letter grade : F");
           System.out.println("I'm sorry. You will have to repeat the course before advancing.");
       }
       sc.close();
   }

}

OUTPUT:

<terminated > TestScores [Java Application] C:\Program Files\Java\jdk-13.0.1\bin\javaw.exe (25-Oct-2020, 2:13:37 am) How many homework scores to enter? 4 Enter homework score #1: 94.6 Enter homework score #2: 82 Enter homework score #3: 78.1 Enter homework score #4: 98 How many test scores to enter? 3 Enter test score #1: 88 Enter test score #2: 78.8 Enter test score #3: 84.3 Enter Midterm exam score: 82.6 Enter Final exam score : 90 Grade Average: 86.04125 Letter grade : B Good job! You can advance to the next course.