Java Reference
In-Depth Information
Display 3.8
Averaging a List of Scores
1
import
java.util.Scanner;
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public
class
Averager
3{
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public
static
void
main(String[] args)
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{
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Scanner keyboard =
new
Scanner(System.in);
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System.out.println("Enter a list of nonnegative scores.");
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System.out.println("Mark the end with a negative number.");
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System.out.println("I will compute their average.");
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double
next, sum = 0;
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int
count = 0;
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next = keyboard.nextDouble( );
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while
(next >= 0)
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{
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sum = sum + next;
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count++;
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next = keyboard.nextDouble( );
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}
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if
(count == 0)
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System.out.println("No scores entered.");
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else
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{
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double
average = sum/count;
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System.out.println(count + " scores read.");
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System.out.println("The average is " + average);
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}
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}
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}
Sample Dialogue
Enter a list of nonnegative scores.
Mark the end with a negative number.
I will compute their average.
87.5 0 89 99.9 -1
4 scores read.
The average is 69.1.
