Computer Science 202
Introduction to Programming
Fall 2012, The College of Saint Rose
GradingBreakdown BlueJ Project
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GradingBreakdown Source Code
The Java source code for GradingBreakdown is below. Click on a file name to download it.
/*
* Example GradingBreakdown -- compute averages based on a grading breakdown,
* prompt for actual grade values for each category, then
* compute and report a final average
*
* Jim Teresco, The College of Saint Rose, CSC 202, Fall 2012
*
* $Id: GradingBreakdown.java 2001 2012-11-29 15:57:51Z terescoj $
*/
import java.util.Scanner;
public class GradingBreakdown {
public static void main(String[] args) {
// constants for the points and percentages for each grade component
final double LA_POINTS = 150;
final double LA_PERCENTAGE = 5;
final double LAB_POINTS = 305;
final double LAB_PERCENTAGE = 10;
final double PROJECT_POINTS = 200;
final double PROJECT_PERCENTAGE = 15;
final double EXAM1_POINTS = 75;
final double EXAM1_PERCENTAGE = 20;
final double EXAM2_POINTS = 75;
final double EXAM2_PERCENTAGE = 25;
final double FINAL_POINTS = 100;
final double FINAL_PERCENTAGE = 25;
System.out.println("This program will help you determine your course average.");
System.out.println("Please enter your raw scores for each grading category when prompted.");
// create a keyboard Scanner
Scanner keyboard = new Scanner(System.in);
// accumulate total grade here
double overallGradeEarned = 0.0;
// lecture assignments:
// read in and error check number of LA points
double laPointsEarned = 0.0;
do {
System.out.print("How many lecture assignment points did you earn (total available: " +
LA_POINTS + ")? ");
laPointsEarned = keyboard.nextDouble();
if ((laPointsEarned < 0.0) || (laPointsEarned > LA_POINTS)) {
System.out.println("Response must be in the range 0.0 to " + LA_POINTS + "!");
}
} while ((laPointsEarned < 0.0) || (laPointsEarned > LA_POINTS));
// compute contribution to total grade for lecture assignments
double laGradeEarned = laPointsEarned / LA_POINTS * LA_PERCENTAGE;
overallGradeEarned += laGradeEarned;
System.out.println("Earned " + laGradeEarned + " grade points out of " + LA_PERCENTAGE + " possible.");
// lab assignments:
// read in and error check number of lab points
double labPointsEarned = 0.0;
do {
System.out.print("How many lab points did you earn (total available: " +
LAB_POINTS + ")? ");
labPointsEarned = keyboard.nextDouble();
if ((labPointsEarned < 0.0) || (labPointsEarned > LAB_POINTS)) {
System.out.println("Response must be in the range 0.0 to " + LAB_POINTS + "!");
}
} while ((labPointsEarned < 0.0) || (labPointsEarned > LAB_POINTS));
// compute contribution to total grade for lab assignments
double labGradeEarned = labPointsEarned / LAB_POINTS * LAB_PERCENTAGE;
overallGradeEarned += labGradeEarned;
System.out.println("Earned " + labGradeEarned + " grade points out of " + LAB_PERCENTAGE + " possible.");
// project assignments:
// read in and error check number of project points
double projectPointsEarned = 0.0;
do {
System.out.print("How many project points did you earn (total available: " +
PROJECT_POINTS + ")? ");
projectPointsEarned = keyboard.nextDouble();
if ((projectPointsEarned < 0.0) || (projectPointsEarned > PROJECT_POINTS)) {
System.out.println("Response must be in the range 0.0 to " + PROJECT_POINTS + "!");
}
} while ((projectPointsEarned < 0.0) || (projectPointsEarned > PROJECT_POINTS));
// compute contribution to total grade for projects
double projectGradeEarned = projectPointsEarned / PROJECT_POINTS * PROJECT_PERCENTAGE;
overallGradeEarned += projectGradeEarned;
System.out.println("Earned " + projectGradeEarned + " grade points out of " + PROJECT_PERCENTAGE + " possible.");
// exam 1:
// read in and error check number of exam1 points
double exam1PointsEarned = 0.0;
do {
System.out.print("How many exam1 points did you earn (total available: " +
EXAM1_POINTS + ")? ");
exam1PointsEarned = keyboard.nextDouble();
if ((exam1PointsEarned < 0.0) || (exam1PointsEarned > EXAM1_POINTS)) {
System.out.println("Response must be in the range 0.0 to " + EXAM1_POINTS + "!");
}
} while ((exam1PointsEarned < 0.0) || (exam1PointsEarned > EXAM1_POINTS));
// compute contribution to total grade for exam 1
double exam1GradeEarned = exam1PointsEarned / EXAM1_POINTS * EXAM1_PERCENTAGE;
overallGradeEarned += exam1GradeEarned;
System.out.println("Earned " + exam1GradeEarned + " grade points out of " + EXAM1_PERCENTAGE + " possible.");
// exam 2:
// read in and error check number of exam2 points
double exam2PointsEarned = 0.0;
do {
System.out.print("How many exam2 points did you earn (total available: " +
EXAM2_POINTS + ")? ");
exam2PointsEarned = keyboard.nextDouble();
if ((exam2PointsEarned < 0.0) || (exam2PointsEarned > EXAM2_POINTS)) {
System.out.println("Response must be in the range 0.0 to " + EXAM2_POINTS + "!");
}
} while ((exam2PointsEarned < 0.0) || (exam2PointsEarned > EXAM2_POINTS));
// compute contribution to total grade for exam 2
double exam2GradeEarned = exam2PointsEarned / EXAM2_POINTS * EXAM2_PERCENTAGE;
overallGradeEarned += exam2GradeEarned;
System.out.println("Earned " + exam2GradeEarned + " grade points out of " + EXAM2_PERCENTAGE + " possible.");
// final exam:
// read in and error check number of final points
double finalPointsEarned = 0.0;
do {
System.out.print("How many final points did you earn (total available: " +
FINAL_POINTS + ")? ");
finalPointsEarned = keyboard.nextDouble();
if ((finalPointsEarned < 0.0) || (finalPointsEarned > FINAL_POINTS)) {
System.out.println("Response must be in the range 0.0 to " + FINAL_POINTS + "!");
}
} while ((finalPointsEarned < 0.0) || (finalPointsEarned > FINAL_POINTS));
// compute contribution to total grade for final
double finalGradeEarned = finalPointsEarned / FINAL_POINTS * FINAL_PERCENTAGE;
overallGradeEarned += finalGradeEarned;
System.out.println("Earned " + finalGradeEarned + " grade points out of " + FINAL_PERCENTAGE + " possible.");
// now, we are ready to report an overall average
System.out.println("Your overall course average is " + overallGradeEarned + ".");
}
}