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Background The International Standard Book Number (ISBN) is a 10- or 13-digit numeric identifier for commercial books. The final digit (10th or 13th), called the
Background The International Standard Book Number (ISBN) is a 10- or 13-digit numeric identifier for commercial books. The final digit (10th or 13th), called the check digit, is used to verify the validity of the identifier, using the following formula: 10-digit ISBN .Multiply the 1st digit by 10 e Multiply the 2nd digit by 9 13-digit ISBN Multiply the Ist digit by 1 Multiply the 2nd digit by 3 Multiply the 3rd digit by 1 Multiply the 9th digit by 2 Multiply the 10th digit by I . Multiply the 1Ith digit by1 .The sum of all the multiples should be divisible Multiply the 12th digit by 3 e Multiply the 13th digit by 1 . by 11 The sum of all the multiples should be divisible by 10 . For example, given the first 9 digits of the 10-digit ISBN 123456789?, the sum of the first 9 multiples is 210. To make the final sum divisible by 11, the 10th digit should be 10. Since 10 eannot be represented using a single decimal digit, x is used instead, to make 123456785% Instructions Write a C program named isbn.c that calculates or verifies the check digit of an ISBN. The program should: Accept one commandline argument: 9 digits: calculate ISBN-10 check digit 10 digits: verify ISBN-10 check digit 12 digits: calculate ISBN-13 check digit 13 digits: verify ISBN-13 check digit o o o o Handle any invalid arguments, including: Incorrect number of arguments Incorrect number of digits in the argument o o o Non-digit (or x wnplicble character in the argument
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