Write a java program where it asks the user to enter exam scores in the range 0

Question

Write a java program where it asks the user to enter exam scores in the range 0 to 100. Enter a negative integer to indicate the end of the input. Display the following statistics:

Total Numbers of scores

Total Number of each letter grade

Percentage ot tatal for each letter grade

Range of scores: lowest and highest

Average Score

This is what I got so far. I am not sure how to get the percentage for each letter grade

import java.util.Scanner;
public class Practice7
{
   public static void main (String [] args)
   {
       int gradeA = 0, gradeB = 0, gradeC = 0, gradeD = 0, gradeF = 0;
       int count = 0;
       double averageA = 0, averageB = 0, averageC = 0, averageD = 0, averageF = 0;
       double averageScore = 0;
       int minGrade = 100;
       int maxGrade = 0;
       double sum = 0;
       Scanner keyboard = new Scanner(System.in);
       System.out.println("Please enter a list of exam scores in the range from 0 to 100");
       System.out.println("Enter a negative scored to end the input");
       int gradesInputed = keyboard.nextInt();

       while(gradesInputed > 0)
       {
           count++; // to count how many inputed
           if(gradesInputed >= 90 && gradesInputed <= 100)
               gradeA++;
           else if(gradesInputed>=80 && gradesInputed<=89)
               gradeB++;
           else if(gradesInputed>=70 && gradesInputed<=79)
               gradeC++;
           else if(gradesInputed>=60 && gradesInputed<=69)
               gradeD++;
           else if(gradesInputed>=0 && gradesInputed<=59)
               gradeF++;
      
           if(averageA > 0)
               averageA = averageA / gradeA;
           if(averageB > 0)
               averageB = averageB / gradeB;
           if(averageC > 0)
               averageC = averageC / gradeC;
           if(averageD > 0)
               averageD = averageD / gradeD;
           if(averageF > 0)
               averageF = averageF / gradeF;
          
           if(gradesInputed < minGrade)
               minGrade = gradesInputed;
           if(gradesInputed > maxGrade)
               maxGrade = gradesInputed;
           gradesInputed = keyboard.nextInt();      
          
           for(int i = 0; i <= count; i++)
           {
               sum = sum + gradesInputed;  
           }
           averageScore = sum / count;

       }
      
       System.out.println(sum);
      
       System.out.println("Total number of scores: " + count);
       System.out.println("Total number of A's:"+ gradeA);
       System.out.println("Total number of B's:"+ gradeB);
       System.out.println("Total number of C's:"+ gradeC);
       System.out.println("Total number of D's:"+ gradeD);
       System.out.println("Total number of F's:"+ gradeF);
      
       System.out.println();
       System.out.println("Total percentage of A's:"+ averageA);
       System.out.println("Total percentage of B's:"+ averageB);
       System.out.println("Total percentage of C's:"+ averageC);
       System.out.println("Total percentage of D's:"+ averageD);
       System.out.println("Total percentage of F's:"+ averageF);
      
       System.out.println();
       System.out.println("The highest grade is: " + maxGrade);
       System.out.println("The lowes grade is: " + minGrade);
       System.out.println("The average score is: " + averageScore);
   }
}

Explanation / Answer

Answer:

import java.util.Scanner;
public class Practice7
{
    public static void main (String [] args)
    {
        int gradeA = 0, gradeB = 0, gradeC = 0, gradeD = 0, gradeF = 0;
        int count = 0,sumoggrade;
        double averageA = 0, averageB = 0, averageC = 0, averageD = 0, averageF = 0;
        double averageScore = 0;
        int minGrade = 100;
        int maxGrade = 0;
        double sum = 0;
        Scanner keyboard = new Scanner(System.in);
        System.out.println("Please enter a list of exam scores in the range from 0 to 100");
        System.out.println("Enter a negative scored to end the input");
        int gradesInputed = keyboard.nextInt();

        while(gradesInputed > 0)
        {
            count++; // to count how many inputed
            if(gradesInputed >= 90 && gradesInputed <= 100)
                gradeA++;
            else if(gradesInputed>=80 && gradesInputed<=89)
                gradeB++;
            else if(gradesInputed>=70 && gradesInputed<=79)
                gradeC++;
            else if(gradesInputed>=60 && gradesInputed<=69)
                gradeD++;
            else if(gradesInputed>=0 && gradesInputed<=59)
                gradeF++;
       sumoggrade=gradeA+gradeB+gradeC+gradeD+gradeE
            if(averageA > 0)
                averageA = gradeA/sumoggrade;
            if(averageB > 0)
                averageB = gradeB/sumoggrade;
            if(averageC > 0)
                averageC = gradeC/sumoggrade;
            if(averageD > 0)
                averageD = gradeD/sumoggrade;
            if(averageF > 0)
                averageF = gradeE/sumoggrade;
          
            if(gradesInputed < minGrade)
                minGrade = gradesInputed;
            if(gradesInputed > maxGrade)
                maxGrade = gradesInputed;
            gradesInputed = keyboard.nextInt();      
          
            for(int i = 0; i <= count; i++)
            {
                sum = sum + gradesInputed;  
            }
            averageScore = sum / count;

        }
      
        System.out.println(sum);
      
        System.out.println("Total number of scores: " + count);
        System.out.println("Total number of A's:"+ gradeA);
        System.out.println("Total number of B's:"+ gradeB);
        System.out.println("Total number of C's:"+ gradeC);
        System.out.println("Total number of D's:"+ gradeD);
        System.out.println("Total number of F's:"+ gradeF);
      
        System.out.println();
        System.out.println("Total percentage of A's:"+ averageA);
        System.out.println("Total percentage of B's:"+ averageB);
        System.out.println("Total percentage of C's:"+ averageC);
        System.out.println("Total percentage of D's:"+ averageD);
        System.out.println("Total percentage of F's:"+ averageF);
      
        System.out.println();
        System.out.println("The highest grade is: " + maxGrade);
        System.out.println("The lowes grade is: " + minGrade);
        System.out.println("The average score is: " + averageScore);
    }
}

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