(Business: check ISBN-13) Rewrite Programming Exercise using a C-string rather than a stri...

(Business: check ISBN-13) Rewrite Programming Exercise using a C-string rather than a string for storing the ISBN numbers. Write the following function that obtains the checksum from the first 12 digits:

int getChecksum(const char s[])

Your program should read the input as a C-string. The sample runs are the same as in Programming Exercise.

Programming Exercise (Business: check ISBN-13) ISBN-13 is a new standard for identifying books. It

uses 13 digits d1 d2d3d4d5d6d7d8d9d1Qdnd12d13. The last digit d13 is a checksum, which is calculated from the other digits using the following formula:

10 − (d1 + 3d2 + d3 + 3d4 + d5 + 3d6 + d7 + 3d8 + d9 + 3d10 + dZ11 + 3d12)%10

If the checksum is 10 , replace it with 0. Your program should read the input as a string. Here are sample runs: