(Business: check ISBN-10) 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 × 1 + d2 × 2 + d3 × 3 + d4 × 4 + d5 × 5 + d6 × 6 + d7 × 7 + d8 × 8 + d9 × 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 an integer. Here are sample runs:


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