1.Write a program in java where you prompt the user to choose how many numbers h

Question

1.Write a program in java where you prompt the user to choose how many numbers he/she wants to calculate the average of. When the user provides you with the input, say 5, then prompt the user to enter 5 numbers. Store all the 5 numbers in an array of integer type (int[] arrayname= new int[5];)

2.Make another array that stores only the even numbers entered by the user and print them. For example, the user choses to enter 5 numbers and these numbers are: 2,3,4,5,6 then your new array should be of size 3 (there are three even numbers) and should store 2, 4 and 6. Print the contents of the new array.

Explanation / Answer

One of the ways of solving this question is to first check the number of even elements in the array and then initilaize the new array (here "newarray[]") for storing the even numbers....

import java.util.Scanner;
class t2
{
    public static void main(String args[])
    {
        Scanner a= new Scanner(System.in);
        System.out.println("Enter the number of numbers: ");
        int b = a.nextInt();
        int arrayname[] = new int[b];   
        int i,c=0,s=0,d=0;
        for(i=0;i<b;i++)
        {
            System.out.println("Enter the "+(i+1)+"th number");
            arrayname[i]=a.nextInt();
            if (arrayname[i]%2 == 0) c++;    //counting the number of even elments in array
            s = s + arrayname[i];
        }
        int newarray[]= new int[c];    //declaring the new array to store even numbers
        s = s/b;
        System.out.println("The average of the numbers are: "+s);
        for(i=0;i<b;i++)
        {
            if (arrayname[i]%2 == 0) {newarray[d] = arrayname[i]; d++;}
        }
        System.out.println("The even numbers are");
        for(i=0;i<newarray.length;i++)
        {
            System.out.print(newarray[i]+"   ");
        }
    }
}

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