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by masklinn 1704 days ago
Not necessarily, you could imagine a system where the header file specifies its edition.
2 comments
cpeterso 1704 days ago
A header file can check #if __STDC_VERSION__ or __cplusplus versions to make some code conditionally available for, say, C11 or C++11.

  #if __STDC_VERSION__ >= 201112L
    // C11 feature
  #endif

  #if __cplusplus >= 201103L
    // C++11 feature
  #endif
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dralley 1704 days ago
But don't header files generally get concatenated together due to the way "dumb" textual includes work?
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