Thread: Declaring functions in a seperate file.

  1. #1
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    Declaring functions in a seperate file.

    If my main file has the line, "#include "myfuncs.h"", and it contains all the function prototypes, and I have all the actual code for the functions in myfuncs.h, would I stil have to have the function prototypes put in that file too? By prototypes I mean where you type void func_name(void) just above the main() function.

  2. #2
    of Zen Hall zen's Avatar
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    No, as long as you include myfuncs.h before any of the functions are used.
    zen

  3. #3
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    It's generally not a good idea (though perfectly legal) to put actual code in .h files -- many compilers precompile headers, which makes compiling faster, but headers with initialized data or code in it can't be precompiled.

    It's also somewhat unconventional to put code in a header. But it is permitted.

  4. #4
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    Originally posted by The V.
    It's generally not a good idea (though perfectly legal) to put actual code in .h files -- many compilers precompile headers, which makes compiling faster, but headers with initialized data or code in it can't be precompiled.

    It's also somewhat unconventional to put code in a header. But it is permitted.
    It may not be a good idea, but I had to in order to get a class template to compile in MSVC 6. Putting the definitions in a different file gave a bunch of linking errors.

  5. #5
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    Yup, MSVC 6 has some issues with templates.

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