Slip No 17 Q A

Q.Write a java Program to accept ‘n’ no’s through command line and store only armstrong no’s into the array and display that array. [15 M]

class ArmstrongArray
{
    // Method to check Armstrong number
    static boolean isArmstrong(int num)
    {
        int temp = num;
        int digits = 0;

        // Count digits
        while(temp != 0)
        {
            digits++;
            temp = temp / 10;
        }

        temp = num;
        int sum = 0;

        // Calculate Armstrong sum
        while(temp != 0)
        {
            int rem = temp % 10;
            sum += Math.pow(rem, digits);
            temp = temp / 10;
        }

        return sum == num;
    }

    public static void main(String args[])
    {
        int arm[] = new int[args.length];
        int count = 0;

        // Read numbers from command line
        for(int i = 0; i < args.length; i++)
        {
            int num = Integer.parseInt(args[i]);

            if(isArmstrong(num))
            {
                arm[count] = num;
                count++;
            }
        }

        // Display Armstrong numbers array
        System.out.println("Armstrong numbers are:");
        for(int i = 0; i < count; i++)
        {
            System.out.print(arm[i] + " ");
        }
    }
}