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how can i check entered string one by one
Paul M Watt 10-Sep-11 3:24am    
Do you mean check single string from a list of ISBN numbers, or test each character in a single ISBN String?

How is your data structured?
Emilio Garavaglia 12-Sep-11 2:35am    
Please use "improve question" and provide more informations.
What you wrote is so vagues and general that cannot lead anywhere.

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P.S.: This is what you asked for. If you need more specific information, ask more specific questions.
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Member 13456370 10-Oct-17 6:49am    
C program to check a number is an isbn number
Stefan_Lang 10-Oct-17 7:39am    
See my P.S. above.

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