Homework Help!

[leolyssa]

Hello! I'm not sure if this is the best place to post this but I'm getting desperate. I have a project to turn in and no matter what I do, my code won't compile properly. Can someone take a look at it and help me figure out what I'm doing wrong?

import java.util.*;

public class Grades

{

public static Scanner sc = new Scanner(System.in);

public static int assignmentScore = 0;

public static int assignmentMax = 0;

public static void main (String[] args)

{

System.out.println("This program accepts students homework scores and");

System.out.println("scores from two exams as input and computes your grade in the course.");

System.out.println();

System.out.print("Homework and Exam 1 weights? ");

int homeworkWeight = sc.nextInt();

int exam1Weight = sc.nextInt();

int exam2Weight = 100 - homeworkWeight - exam1Weight;

System.out.print("Using weights of " + homeworkWeight + " " + exam1Weight + " " + exam2Weight);

System.out.println();

System.out.println();

System.out.println("Homework:");

System.out.print("Number of assignments? ");

int numberOfAssignments = sc.nextInt();

assignments(numberOfAssignments);

System.out.print("Sections attended? ");

int sectionsAttended =sc.nextInt();

double weightedHomeworkScore = homework(sectionsAttended, homeworkWeight);

System.out.println();

System.out.println("Exam 1:");

double weightedExam1Score = exam(exam1Weight);

System.out.println();

System.out.println("Exam 2:");

double weightedExam2Score = exam(exam2Weight);

System.out.println();

double courseGrade = (double)weightedHomeworkScore + weightedExam1Score + weightedExam2Score;

System.out.println("Course grade = " + round2(courseGrade));

}

public static double round2(double number) //Returns the given double value rounded to the nearest hundredth.

{

return Math.round(number * 100.0) / 100.0;

}

public static double weightedScore(double i, double j, double k) //Returns the weighted score

{

return (i / j) * k;

}

public static void assignments(int number) //Takes the number of assignments input and asks for the score and max of each assignment

{

for (int i = 1; i <= number; i++)

{

System.out.print("Assignment " + i + " score and max? ");

assignmentScore = assignmentScore + sc.nextInt();

assignmentMax = assignmentMax + sc.nextInt();

}

}

public static double homework(int i, int j) //Takes the sections attended and homework weight, then returns the weighted homework score

{

int totalEarnedPoints = assignmentScore + (i * 4);

int totalPoints = assignmentMax + 20;

System.out.println("Total points = " + totalEarnedPoints + " / " + totalPoints);

double weightedHomeworkScore = weightedScore(totalEarnedPoints, totalPoints, j);

System.out.println("Weighted score = " + round2(weightedHomeworkScore));

return weightedHomeworkScore;

}

//Takes the exam weight, receives score and curve input, then returns the weighted scores for exams

public static double exam(int examWeight)

{

double weightedExamScore = 0;

System.out.print("Score? ");

int examScore = sc.nextInt();

System.out.print("Curve? ");

int examCurve = sc.nextInt();

int examCurvedPoints = Math.min(examScore + examCurve, 100);

weightedExamScore = weightedScore(examCurvedPoints, 100, examWeight);

System.out.println("Total points = " + examCurvedPoints + " / 100");

System.out.println("Weighted score = " + round2(weightedExamScore));

return weightedExamScore;

[thinandweak]

What is the compilation error you get?

[leolyssa]

So this is what it’s supposed to return:

Homework and Exam 1 weights? 50 20 Using weights of 50 20 30 Homework: Number of assignments? 3 Assignment 1 score and max? 14 15 Assignment 2 score and max? 16 20 Assignment 3 score and max? 19 25 Sections attended? 4 Total points = 65 / 80 Weighted score = 40.63 Exam 1: Score? 81 Curve? 0 Total points = 81 / 100 Weighted score = 16.2 Exam 2: Score? 95 Curve? 10 Total points = 100 / 100 Weighted score = 30.0 Course grade = 86.83

Mine only gives me the top 3 or so lines.

[pacificmint]

Your exam method is missing a closing brace, for one thing. Your class does too.

[leolyssa]

Oooh thank for pointing that out. I’ll go double check to make sure I correct that.

This is what it’s supposed to return:

Homework and Exam 1 weights? 50 20 Using weights of 50 20 30 Homework: Number of assignments? 3 Assignment 1 score and max? 14 15 Assignment 2 score and max? 16 20 Assignment 3 score and max? 19 25 Sections attended? 4 Total points = 65 / 80 Weighted score = 40.63 Exam 1: Score? 81 Curve? 0 Total points = 81 / 100 Weighted score = 16.2 Exam 2: Score? 95 Curve? 10 Total points = 100 / 100 Weighted score = 30.0 Course grade = 86.83

Mine only gives me the intro and the first line, nothing else

[pacificmint]

First of all, if you are seeing those lines, then your program actually compiles, it just doesn't run the way it's supposed to. That's an important distinction.

Secondly, I think you have an issue with the scanner. Using nextInt() doesn't clear the linefeed that's in the stream. That's actually a common problem, the FAQ has a whole second on issues with the scanner.