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Thread: Need Help with some code

  1. #1
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    Default Need Help with some code

    hey im trying to write a program that has a loop in it and takes the percentage of the total number of scores and the scores that passed which are above 70
    here's my code when i go to run it and input the scores and it comes up with a question mark as an answer
    <import java.util.Scanner;
    import java.text.NumberFormat;
    public class DANPercentPassage {
     
     
    	public static void main(String[] args) {
    		int score, pass, fail, total;
    		double percent;
    		percent = 0;
    		pass = 0;
    		fail = 0;
    		total = pass + fail;
    		Scanner sc = new Scanner(System.in);
    		NumberFormat per = NumberFormat.getPercentInstance();
    		per.setMinimumFractionDigits(2);
    		per.setMaximumFractionDigits(0); 
    		do{
    			System.out.print("Enter the score: ");
    		score = sc.nextInt();
    		if(score>=70)
    			pass = pass + 1;
    		else if(score>0&&score<70)
    			fail = fail + 1; 
    		}while(score!=-1);
    		percent = (double) pass/total;
     
    		if(score == -1)
    			System.out.print("The percent of the scores is "+ per.format(percent));
     
     
     
     
    	}
     
    }
    And heres my console window when i run it
     
    Enter the score: 80
    Enter the score: 80
    Enter the score: 35
    Enter the score: 35
    Enter the score: -1
    The percent of the scores is ?%>
    Get back to me ASAP


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Need Help with some code

    Try printing the value of the variable: percent without formatting to see what its value is.

    Please edit your post and wrap your code with code tags:
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. The Following User Says Thank You to Norm For This Useful Post:

    dnewell15 (April 13th, 2013)

  4. #3
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    Default Re: Need Help with some code

    there you go thanks for the tip ill try and that and reply if i still can't figure it out

    --- Update ---

    when i do that it is saying that it is infinity

  5. #4
    Super Moderator Norm's Avatar
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    Default Re: Need Help with some code

    That's what you get from dividing by 0
    If you don't understand my answer, don't ignore it, ask a question.

  6. The Following User Says Thank You to Norm For This Useful Post:

    dnewell15 (April 13th, 2013)

  7. #5
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    Default Re: Need Help with some code

    ok i figured it out thanks for your help

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