ansi C question

[moi]

is there any #define that can be checked to see if your source file is being compiled in an ansi-compliant enviornment?

[Prelude]

There's a macro called __STDC__ which you can check. If the compiler supports standard C then __STDC__ will be defined as one, otherwise it will be undefined.

Try running this. In MSVC++ 6 if you run the program with the /Za switch active then it will output 'Standard!' and if you turn off the /Za switch it will print 'Bugger!':

#include <stdio.h>

int main ( void )
{
#ifdef __STDC__
  (void)puts ( "Standard!" );
#else
  (void)puts ( "Bugger!" );
#endif
  return 0;
}

-Prelude