| Posted By: R Iyke |
5/20/2006 10:44:00 AM |
| Reply To: parwej who posted... |
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It is a Preprocessor directive and most times optional to make your programs more efficient. Example: you write a class which will be included in a program, since you will always include header files like in the program, then to avoid duplication, you can use #if...and #else... in the declaration of the class so that it is included only if it is not included in the main program.
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