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How avoid multiple includes of one file

Hi
I've split my project in 2 parts while each part is implemented by one.
So some includes like <reg51.h> is done twice which resulted in error. So in order to avoid this I did as follows:

#if !defined(REG51_h__INCLUDED_)
#define REG51_h__INCLUDED_
#endif

but it seems that this doesn't result in:
#include <reg51.h>
if it has not been included before.
How should I solve it?!!
I appreciate your attention in advance!!

Parents
  • "I avoid such conflicts myself by using a unique naming convention for my own files."

    Yes - that is the whole point!
    The convention is that ames beginning with uderscores are reserved for compiler writers - so if you use them, you have no guarantee that any name you choose will be unique (ie, that your compiler won't have got there first!)

Reply
  • "I avoid such conflicts myself by using a unique naming convention for my own files."

    Yes - that is the whole point!
    The convention is that ames beginning with uderscores are reserved for compiler writers - so if you use them, you have no guarantee that any name you choose will be unique (ie, that your compiler won't have got there first!)

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