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Time:02-12

Finance: credit card number check
Won't be able to use these functions, to do this problem, the string is not very understand, would like to know how to do this topic

CodePudding user response:

In fact, I want to know, is that getDigit the function, is what to do, say the number returned, if is single, otherwise it is two Numbers and, this is put, on a function to write it again