Hi, I am new to C++ so bear with me a little bit. I am looking at a sample program for an isbn check. The first nine digits are supposed to be multiplied by a weight, added together and then divided by 11 and that should give you the 10th number or the check number.

So in the sample, the user inputs the number and it is stored in an array called isbn, the main function calls calcRemainder(b ookNo). I look further down the program...