How to check if ISBN format is valid?
Question is
Do simple validation of data entered into a Book; for example, accept ISBNs only of the form n-n-n-x where n is an integer and x is a digit or a letter. Store an ISBN as a string.
Is there anyway to take a string and put it into the input stream? I guess the checking will be easy then.
Do simple validation of data entered into a Book; for example, accept ISBNs only of the form n-n-n-x where n is an integer and x is a digit or a letter. Store an ISBN as a string.
Is there anyway to take a string and put it into the input stream? I guess the checking will be easy then.
I've recently done that for an assignement. What you wanna do is to get each of the Block of Numbers (separated by -) and check certain things on those 'Blocks'. Or you could go character by character, but first method is most efficient.
https://en.wikipedia.org/wiki/International_Standard_Book_Number (This page helped me alot do to the function)
Good luck and keep posting if you need help !
https://en.wikipedia.org/wiki/International_Standard_Book_Number (This page helped me alot do to the function)
Good luck and keep posting if you need help !
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