Write a program to read a list of exam grades given as int's in the range of 0 to 100. Your program will display the total number of grades and the number of grades in each letter-grade category as follows: A93 <= grade <= 100 A- 90 <= grade < 93 B+ 87 <= grade < 90 B 83 <= grade < 87 B- 80 <= grade < 83 C+ 77 <= grade < 80 C 73 <= grade < 77 C- 70 <= grade < 73 D 60 <= grade < 70 F 0 <= grade < 60 Use a negative number as a sentinel value to indicate the end of the input. (The negative value is used only to end the loop, do not use it in your calculations.) Each time you prompt the user to enter a grade you will print: Enter a grade:
For example, if the input is: 98 95 87 86 83 92 85 78 74 72 81 71 69 63 50 43 -1 The output would be:
Total number of grades = 16
Number of A's = 2
Number of A-'s = 1
Number of B+'s = 1
Number of B's = 3
Number of B-'s = 1
Number of C+'s = 1
Number of C's = 1
Number of C-'s = 2
Number of D's = 2
Number of F's = 2
The highest score is 98
The lowest score is 50
The average is 75.5
This is what I have so far and it is not working correctly:
public static void main(String[] args) {
// scanner
Scanner scnr =new Scanner (System. in);
//ints grades and count
int x;
int A = 0;
int B = 0;
int C = 0;
int D = 0;
int F = 0;
int count = 1;
//int min max total
int min, max;
int total = 0 ;
//double
double average;
//prompt user for input
System. out. print("Please enter the exam scores as integer ");
System. out. print("percentages in the rage 0-100. ");
System. out. println("Please end the list with a negative integer.");
//scnr
x = scnr. nextInt();
min = x;
max = x;
//while loop
while (x >= 0){
x = scnr. nextInt();
if (x >= 0){
total = total + x;
count++;
if (x < min)
min = x;
if (x > min)
max = x; }
while (x >= 90 && x <= 100) {
x = scnr. nextInt();
A++;
//Grade B
if (x >= 80 && x <= 89)
B++;
//Grade C
if (x >= 70 && x <= 79)
C++;
//Grade D
if (x >= 60 && x <= 69)
D++;
//Grade F
if (x >= 0 && x <= 59)
F++;
}
}
// average
average = total/count;
//results/output
System. out. println("Total number of grades: " + count);
System. out. println("Number of A's: " + A);
System. out. println("Number of B's: " + B);
System. out. println("Number of C's: " + C);
System. out. println("Number of D's: " + D);
System. out. println("Number of F's: " + F);
System. out. println("Highest score: " + max);
System. out. println("Lowest score: " + min);
System. out. println("Average: " + average);
}
}