Lab #2 (Exercise 3-2)

Modify the Test Score application

Due Date: Wednesday of Week 1
10 points

Before you start, check which team you belong to.

If you downloaded the file, open the file named TestScoreApp.java that's in your computer or USB drive. Save the program as EnhancedTestScoreApp.java. Change the class name to EnhancedTestScoreApp. If you don't have the file, copy and paste the code below:

import java.util.Scanner;

public class TestScoreApp
{
    public static void main(String[] args)
    {
        // display operational messages
        System.out.println("Please enter test scores that range from 0 to 100.");
        System.out.println("To end the program enter 999.");
        System.out.println();  // print a blank line

        // initialize variables and create a Scanner object
        double scoreTotal = 0;
        int scoreCount = 0;
        int testScore = 0;
        Scanner sc = new Scanner(System.in);

    	// get a series of test scores from the user
        while (testScore <= 100)
        {
		    // get the input from the user
            System.out.print("Enter score: ");
        	testScore = sc.nextInt();

        	// accumulate score count and score total
        	if (testScore <= 100)
        	{
        		scoreCount = scoreCount + 1;
        		scoreTotal = scoreTotal + testScore;
			}
		}

    	// display the score count, score total, and average score
    	double averageScore = scoreTotal / scoreCount;
    	String message = "\n" +
    	                 "Score count:   " + scoreCount + "\n"
    	               + "Score total:   " + scoreTotal + "\n"
		               + "Average score: " + averageScore + "\n";
		System.out.println(message);
	}
}

Use the += operator to increase the scoreCount and scoreTotal fields. Then, test this to make sure that it works.
As the user enters test scores, use the methods of the Math class to keep track of the minimum and maximum scores. When the user enters 999 to end the program, display these scores at the end of the other output data. Now test these changes to make sure that they work.
Change the variable that you use to total the scores from a double to an int data type. Then, use casting to cast the score count and score total to double as you calculate the average score and save that average as a double. Now test that change.
Use the NumberFormat class to round the average score to one decimal place before displaying it at the end of the program. Then, test this change.Note that the rounding method that's used doesn't matter in a program like this.

Include in your program the following comments:

Name of program
Team's name with all the names of the members (e.g. Team A: John Doe, Jane Smith, etc.)
Current Date
Computer system and compiler you are using
Brief description of the program

Compile and run the Java program.

Take a screen capture by hitting simultaneously the keys Alt and Print Screen (Prt Sc) of the output results (console) and paste it in MS Paint. Save it as a gif file.

When you are ready, upload the java program and the gif file by clicking the link below:

Upload Lab

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