Question

Write a Java program in Eclipse. .

Write a Java program that:

1. Creates an array of 100 integers. Initialize the array to have all zeros.

2. Puts even numbers starting from 6 (excluding multiples of 12) into the first 50 slots of the array above. So numbers 6,8,10,14,16,18,20,22,26, etc. go into the first 50 positions in the array. Print the array.

3. Puts random numbers between 45 and 55 into the second 50 slots of the array above (second 50 positions). Print the array.

4. Shuffle the contents of the array. Print the array.

5. Find the average of all the numbers from the 50th index to the 100th index in the array. Which is the second half of the array.

6. Print the average to five decimal places of accuracy to the right of the decimal. Meaning something like this 12.34567

Answer 1

If you have any doubts please comment.

Java   Program:
import java.util.Random;
public class Example{

    public static void main(String[] args) {
        int[] arr = new int[100];
        int total = 0,j;
       j=6;
       double sum=0,avg;

       for(int i=0;i<100;i++)

       {

        arr[i]=0;

        }
        for(int i=0; i<50;){
           if((j%12)!=0)
           {
               arr[i]=j;
               i++;
           }
           j=j+2;
        }
        for(int i=50; i<100; i++){
           arr[i]=new Random().nextInt((55 - 45) + 1) + 45;
        }
        for(int i=0; i<arr.length; i++){
           System.out.print(arr[i]+" ");
        }
        for(int i=50; i<arr.length; i++){
           sum=sum+arr[i];
        }
        avg=sum/50;
        System.out.println();
        System.out.println();
        System.out.format("average=%.5f", avg);
        System.out.println();
        System.out.println();
    }
}