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Thread: Beginner Objects

  1. #1
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    Unhappy Beginner Objects

    Hey all, I'm in an intro class for Java in University and I'm pretty confused with Objects. Current assignment is to have a program remember, and keep track of students who have gotten As, Bs, Cs, Ds, and Fs.

    So far I have gotten the program to remember grades through if - else if statements. However I now need to have the program provide the percentage of those who have gotten As through Fs.

    Here is what I have for my working page for reference.

    Thanks in advanced.

    *****************************************

    public class GradeDistribution {
    //Instance Variables

    public int As, Bs, Cs, Ds, Fs, getTotal, addGrade, grade;
    public double percentAs, percentBs, percentCs, percentDs, percentFs;

    //Constructor
    public GradeDistribution() {
    As = 0;
    Bs = 0;
    Cs = 0;
    Ds = 0;
    Fs = 0;

    }
    //Getters

    public int getAs() {
    return As;
    }

    public int getBs() {
    return Bs;
    }

    public int getCs() {
    return Cs;
    }

    public int getDs() {
    return Ds;
    }

    public int getFs() {
    return Fs;
    }

    public double percentAs() {
    return percentAs;
    }

    public double percentBs() {
    return percentBs;
    }

    public double percentCs() {
    return percentCs;

    }

    public double percentDs() {
    return percentDs;

    }

    public double percentFs() {
    return percentFs;
    }

    public int getTotal() {
    getTotal = As+Bs+Cs+Ds+Fs;
    return getTotal;
    }

    public void addGrade(int addGrade) {
    if (addGrade >= 80 && addGrade <= 100) {
    As++;
    } else if (addGrade >= 70 && addGrade < 80) {
    Bs++;
    } else if (addGrade >= 60 && addGrade < 70) {
    Cs++;
    } else if (addGrade >= 50 && addGrade < 60) {
    Ds++;
    } else if (addGrade >= 0 && addGrade < 50) {
    Fs++;
    }
    }

    public void reset() {

    }

    //Bar Graph

    public void print() {
    System.out.println("0 10 20 30 40 50 60 70 80"
    + " 90 100");
    System.out.println("|_____|_____|_____|_____|_____ |_____|_____|_____|"
    + "_____|_____|");
    }
    }

  2. #2
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    Default Re: Beginner Objects

    The percentage of those that got a particular grade, say B, is the number that got B's divided by the total number of grades. So if 2 got b's and 3 got c's then the percentage of B's would be 2/5 or 40%. So you need to keep a tally of individual grades as well as all grades.

    Regards,
    Jim

  3. #3
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    Default Re: Beginner Objects

    I ended up doing a bit more research and figured out that methods can work off each other. (Still trying to wrap my head around that)

    Following with this. the next task for me is to have (I'm assuming) a for loop with showing a table with stars on how many scores equal an A, B, C, and so on. Ill send a more clear code sample for that if you don't mind checking it out Jim!

    *************************************************

    System.out.println("0 10 20 30 40 50 60 70 80"
    + " 90 100");
    System.out.println("|_____|_____|_____|_____|_____ |_____|_____|_____|"
    + "_____|_____|");

    That is all I have so far, however with the stars in it should look a little something like this. (This would be the output)
     
    ***************************
     
    0        10      20       30       40      50       60       70       80      90      100
    |_____|_____|_____|_____|_____|_____|_____|_____|_____|_____|
    A******************
    B******
    C******
    D******
    F************************


    --- Update ---

    Unfortunately the forum doesn't like to have excessive spaces. For the sake of it, pretend all the numbers line up nicely with the |'s
    Last edited by Norm; October 29th, 2018 at 08:57 AM. Reason: added code tags to align numbers

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    Default Re: Beginner Objects

    Solved.

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