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Thread: Can't find solution for error in my code..

  1. #1
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    Default Can't find solution for error in my code..

    Here is my code

    /**
     * Write a description of class Student here.
     * 
     * @author ...
     * @version ...
     */
    import java.util.Scanner;
     
    public class Student
    {
        //declare instance data
        private String name;
        private int test1;
        private int test2; 
        private int average;
     
        //constructor
        //-----------------------------------------------
        public Student(String studentName)
        {
            //add body of constructor
            studentName = name;               
        }
        //-----------------------------------------------
        //inputGrades: prompt for and read in student's grades for test1
        //and test2.
        //Use name in prompts, e.g., "Enter's Joe's score for test1".
        //-----------------------------------------------
        public void inputGrades()
        {
            //add body of inputGrades
            Scanner in = new Scanner(System.in);
            System.out.println("Enter the score for test 1: ");
            test1 = in.nextInt();
     
            System.out.println("Enter the score for test 2: ");
            test2 = in.nextInt();
        }
        //-----------------------------------------------
        //getAverage: compute and return the student's test average
        //-----------------------------------------------
        //add header for getAverage
        public double getAverage()
        {
            //add body of getAverage
            average = (test1 + test2) / 2.0;
            return average;
        }
        //-----------------------------------------------
        //getName: return the student's name
        //-----------------------------------------------
        //add header for getName
        public String getName()
        {    
            //add body of getName
            return name;        
        }
     
        public void getGrade()
        {
            if(average <= 100)  {System.out.println("The grade for" + name + "is A!");}
            else if(average <= 89) {System.out.println("The grade for" + name + "is B!");}
            else if(average <= 79) {System.out.println("The grade for" + name + "is C!");}
            else if(average <= 69 && average >= 60) {System.out.println("The grade for" + name + "is D!");}
            else {System.out.println("The grade for" + name + "is F!");}
        }
     
    }


    The problem is with the method getAverage.. Assignment says that I gotta use double or float instead of int variable to get a decimal number, but when I use double or float compiler says that it is precision error, and that it is better to use int. So, what to do here?


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Can't find solution for error in my code..

    compiler says that it is precision error,
    Can you copy the full text of the error message and post it here.

    If you understand what precision may be lost and don't care, you can cast the value to tell the compiler that you know what you are doing.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Can't find solution for error in my code..

    possible loss of precision
    required: int; found: double

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: Can't find solution for error in my code..

    Where is the rest of the error message showing the line of source code where the error happens?
    Did you try using a cast?
    int x = (int)1.234;
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: Can't find solution for error in my code..

    public double getAverage()
        {
            //add body of getAverage
            average = (test1 + test2) / 2.0;
            return average;
        }

    It shows that error happens average = (test1 + test2) / 2.0

    I didn't try that, and actually don't understand what is that hehe

    --- Update ---

    I got it.. Mistake was in declaration.. I declare it as int so it couldn't recognize it.. Thank you anyways

  6. #6
    Super Moderator Norm's Avatar
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    Default Re: Can't find solution for error in my code..

    I got it.
    I've marked this as solved.
    If you don't understand my answer, don't ignore it, ask a question.

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