#define V.S const

In C++, with a decent optimising compiler, const is better. Anything which makes your intentions clearer to the compiler increases the _potential_ for better optimisations.

#define is just a pre-processor macro, what appears in it gets substituted before compilation. The main reason to use #define is if you have a constant which is also used in a C or assembly language program.

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Simon O''''Connor
Creative Asylum Ltd
www.creative-asylum.com

oic. thx!

but what does it mean?

"The main reason to use #define is if you have a constant which is also used in a C or assembly language program."

Is it mean if i will not use C or assembly language, i can no need use #define?

Also do a lookup on ''enum''. Perhaps you''ll like that even better.

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Reach out and torch someone.