Example 81: Verify an ISBN Number
Explore how to validate 10-digit ISBN numbers in C by computing a weighted sum of digits and verifying the checksum. This lesson helps you understand string handling, input validation, and checksum logic to determine if the ISBN is correct or invalid.
We'll cover the following...
We'll cover the following...
Problem
To uniquely identify a book, a 10-digit ISBN number is used. The ISBN number is considered to be correct if the sum of the following statement is a multiple of 11, where denotes the ith digit from the right.
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