Authors:
Stuart Reges, Marty Stepp
Chapter:
Conditional Execution
Exercise:
Exercises
Question:8 | ISBN:9780136091813 | Edition: 2
Question
Write a method called printGPA that accepts a Scanner for the console as a parameter and calculates a student’s grade point average. The user will type a line of input containing the student’s name, then a number that represents the number of scores, followed by that many integer scores. Here are two example dialogues:
Enter a student record: Maria 5 72 91 84 89 78
Maria's grade is 82.8
Enter a student record: Jordan 4 86 71 62 90
Jordan's grade is 77.25
Maria’s grade is 82.8 because her average of (72 + 91 + 84 + 89 + 78) / 5 equals 82.8.
Answer
Program:
import java.util.Scanner;
public class Ch04Ex08
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
printGPA(keyboard);
}
public static void printGPA(Scanner keyboard)
{
String name;
int n, score;
double sum = 0;
double average = 0;
System.out.print("Enter a student record: ");
name = keyboard.next();
n = keyboard.nextInt();
for (int i = 0; i < n; i++)
{
score = keyboard.nextInt();
sum += score;
}
if(n > 0)
{
average = sum / n;
}
System.out.println(name + "'s grade is " + average);
}
}
Output 1:
Enter a student record: Maria 5 72 91 84 89 78
Maria's grade is 82.8
Output 2:
Enter a student record: Jordan 4 86 71 62 90
Jordan's grade is 77.25