An ISBN-10 (International Standard Book Number) consists of 10 digits: d1d2d3d4d5d6d7d8d9d10. The last digit, d10, is a checksum which is calculated from the other nine digits using the following formula: (d1 x 1 + d2 x 2 + d3 x 3 + d4 x 4 + d5 x 5 + d6 x 6 + d7 x 7 + d8 x 8 + d9 x 9) % 11 If the checksum is 10, the last digit is denoted as X according to the ISBN-10 convention. Write a program that prompts the user to enter the first 9 digits and displays the 10-digit ISBN (including leading zeros). Your program should read the input as a single integer (not 9 separate ones). Hint: Use integer division and the modulo operator to extract each individual digit from the nine digit input from the user. Here are 4 sample runs: Enter the first 9 digits of the ISBN as an integer: 013031997 The ISBN-10 number is 013031997X. Enter the first 9 digits of the ISBN as an integer: 000111222 The ISBN-10 number is 0001112228. Enter the first 9 digits of the ISBN as an integer: 987654321 The ISBN-10 number is 9876543210. Enter the first 9 digits of the ISBN as an integer: 123456789 The ISBN-10 number is 123456789X.

I have done most of this program and have run into some problems. This is what I have so far it comes up wrong and I dont understand what is wrong.

import java.util.Scanner;

public class Lab5c {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.print("Enter the first 9 digits of the ISBN as an integer: ");

int isbn = input.nextInt();

int d1 = isbn / 100000000;

int remainingDigits = isbn % 100000000;

int d2 = remainingDigits / 10000000;

remainingDigits %= 10000000;

int d3 = remainingDigits / 1000000;

remainingDigits %= 1000000;

int d4 = remainingDigits / 100000;

remainingDigits %= 100000;

int d5 = remainingDigits / 10000;

remainingDigits %= 10000;

int d6 = remainingDigits / 1000;

remainingDigits %= 1000;

int d7 = remainingDigits / 100;

remainingDigits %= 100;

int d8 = remainingDigits / 10;

remainingDigits %= 10;

int d9 = remainingDigits;

int d10 = (d1 * 1 + d2 * 2 + d3 * 3 + d4 * 4 + d5 * 5 + d6 * 6 + d7 * 7 + d8 * 8 + d9 * 9) % 11;

System.out.println("The ISBN-10 number is " + d1 + d2 + d3 + d4 + d5 + d6 + d7 + d8 + d9);

if (d10 == 10)

System.out.print("X");

else

System.out.print(d10);

}

}