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The predefined constant M_PI seems to be missing from my machines copy of math.h.
The predefined constant M_PI seems to be missing from my machines copy of math.h.
✍: Guest
That constant (which is apparently supposed to be the value of pi, accurate to the machine's precision), is not standard; in fact a standard-conforming copy of
#ifndef M_PI
#define M_PI 3.1415926535897932385
#endif
to provide your own #definition only if some system header file has not.)
2015-06-24, 1238👍, 0💬
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