[The Woody]

Quote:

Originally Posted by Jeffry Save all the used numbers in a file. Then, when someone buys a new number, loop through the file's context and use strcmp between the line of the file and the number (formatted to strings [wiki => strcmp helps]). If the file is read to the end, and the strcmp was never same, then he/she may use the number, in case that there is a line same to the number, stop the loop and return that the number is already in usage. Got that? ^^ Jeffry

I think i got it ^^. Then if they get a new number then delete it from the file again. Well im gonna try to make this thanks for your suggestion/help .