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Thread: Help!! Need to add a few things and I be lost!!

  1. #1
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    Default Help!! Need to add a few things and I be lost!!

    Her's my code with print out below.
    But I need the overall class average to be right, and I need to add A=x B=x C=x D=x F=x
    X= how many where given out

    I like to meet the person who said can't teach an old dog new tricks, I'm almost a believer.

    [CODE]  import java.io.FileNotFoundException;
    import java.io.FileReader;
    import java.util.Scanner;
     
     
     
    public class StudentGrades {
     
     
     
    //Declare variables and make the total test a constant equal to 3, since there are 3 tests
    private static double TOTAL_TESTS = 3;
     
     
        private static double average;
        private static char grade;
     
        //Use an array to store the 3 test scores
        private static int[] testScore = new int[3];
     
        private static String name;
        public StudentGrades() {
     
     
            //initialize the average, grade and name to zero,empty and null
            average = 0;
     
            grade = ' ';
     
            name="null";
        }
     
        public static void getAverage(Scanner inFile) {
        //create local variable to store temporary average in
        int tempAverage = 0;
        for (int num = 0; num <=2; num++) {
        testScore[num] = inFile.nextInt();
     
     
       //Add all the scores together per student
       tempAverage = testScore[num] + tempAverage;
     
     
     
     
     
       //Divide the average by the total amount of tests(3)
       average = (double)tempAverage / (TOTAL_TESTS);
     
            }
     
     
        }
     
        public char calculateGrade(Scanner inFile) {
     
            //Assign a grade to the appropriate numerical value 
     
     
            //A=90-100 B=80-89 C=70-79 D=60-69 F=Below 60
     
            if (average <= 100 && average >= 90) {
     
     
                grade = 'A';
            } else if (average < 90 && average >= 80) {
     
                grade = 'B';
     
     
            } else if (average < 80 && average >= 70) {
                grade = 'C';
     
     
            } else if (average < 70 && average >= 60) {
     
                grade = 'D';
     
     
            } else {
     
                grade = 'F';
     
     
            }
     
            //Return the appropriate grade 
            return grade;
     
        }
     
     
        public static void main(String[] args) throws FileNotFoundException {
     
    //Open the file that you are reading the information from
            try (Scanner inFile = new Scanner(new FileReader("TestDate.txt"))) {
                StudentGrades averages = new StudentGrades();
     
     
        //Read the input file until there is no text
                while (inFile.hasNext()) {
     
        // get the name of the student
     
                    name = inFile.next();
     
        // get the name of the student
     
                StudentGrades.getAverage(inFile);
     
        //Calculate the average
                    grade = averages.calculateGrade(inFile);
     
     
        //Output each students name, test scores, average numerical grade and letter grade
     
     
                    for (int num = 0; num <= 2; num++) {
                    //calculate sum of all array elements 
     
                    }
     
     
     
    System.out.printf("%s\t has an average grade of  %.2f  You will receive a %s in this class.\n", name, average, grade);
    }
     
     
    System.out.printf("\nOverall Class Average is %.2f\n",average/1.4);         
     
    //generates three random numbers between 0 and 50, calculates the average.
          int one,two,three;
          one=(int)(Math.random()*(51));
          two=(int)(Math.random()*(51));
          three=(int)(Math.random()*(51));
     
          int average=(one+two+three)/3;
          System.out.printf("\nThe following program generates 3 random numbers, then averages them.\n");
          System.out.printf("\nThe average of\t"+one+"  "+two+"  "+three+"  is   "+average);
     
     
     
            }
     
        }
     
     
    }
    [/CODE]

    Current print out is:

    Connie has an average grade of 85.33 You will receive a B in this class.
    James has an average grade of 92.00 You will receive a A in this class.
    Susan has an average grade of 52.33 You will receive a F in this class.
    Jake has an average grade of 66.33 You will receive a D in this class.
    Karen has an average grade of 77.33 You will receive a C in this class.
    Bill has an average grade of 99.00 You will receive a A in this class.
    Fred has an average grade of 85.33 You will receive a B in this class.
    Cheryl has an average grade of 75.00 You will receive a C in this class.
    Pam has an average grade of 65.00 You will receive a D in this class.
    Steve has an average grade of 45.00 You will receive a F in this class.
    John has an average grade of 86.33 You will receive a B in this class.
    David has an average grade of 81.67 You will receive a B in this class.
    Corina has an average grade of 91.67 You will receive a A in this class.
    Delia has an average grade of 74.00 You will receive a C in this class.
    Evan has an average grade of 99.00 You will receive a A in this class.

    Overall Class Average is 70.71

    The following program generates 3 random numbers, then averages them.

    The average of 45 35 23 is 34
    ----jGRASP: operation complete.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Help!! Need to add a few things and I be lost!!

    I need the overall class average to be right,
    Please explain what the problem is. Show the current output and explain what is wrong with it and show the correct answer.

    I need to add A=x B=x C=x D=x F=x X= how many where given out
    Can you explain what you are asking here? An example perhaps?

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