Question

Write a program that prompts the user to input daily rainfalls and display the total and average rainfall. Use a sentinel controlled loop with sentinel value of -1.  

Your output values should only have three digits after the decimal point.

Test your program with following input data.

0.31

0.0

0.52

0.79

1.15

1.23

0.93

0.0

0.0

-1

The output of the program should be:

The total rainfall is : 4.930

The average rainfall is : 0.547

Copy and paste your program and outputs.

Answer 1

import java.util.Scanner;

public class AverageRainfall {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        double total = 0, count = 0, rainfall;
        while (true) {
            rainfall = in.nextDouble();
            if (rainfall == -1)
                break;
            total += rainfall;
            count++;
        }
        System.out.printf("The total rainfall is : %.3f\n", total);
        System.out.printf("The average rainfall is : %.3f\n", total/count);
    }
}