Question

Given 4 integers, output their product and their average, using integer arithmetic.

Answer 1

Answer:

import java.util.Scanner;

public class num10 {

   public static void main(String[] args) {

   Scanner scnr = new Scanner(System.in);

   int num1 = scnr.nextInt();

   int num2 = scnr.nextInt();

   int num3 = scnr.nextInt();

   int num4 = scnr.nextInt();

   int product = num1*num2*num3*num4;

   int average = (num1+num2+num3+num4)/4;

   System.out.println(product+" "+average);

   // Part Two

   double prod = num1*num2*num3*num4;

   double ave =  (double)(num1+num2+num3+num4)/4;

   System.out.printf("%.3f", prod);

   System.out.println();

   System.out.printf("%.3f", ave);

   }

}

Explanation:

As required in the question, four variables are created to hold values for num1, num2,num3,num4.

The product  is evaluated:  int product = num1*num2*num3*num4;

The average is evaluated: int average = (num1+num2+num3+num4)/4;

These are output to the screen

In part two;

The product and average are declared as type double so as to hold floating point number

double ave =  (double)(num1+num2+num3+num4)/4; In order to avoid integer division which discards the remainder, a type casting is performed on the 4 input variables.

Finally using printf method new values of product and average is outputed.