🚀 go-pugleaf

In article <1992Oct30.010005.18407@alchemy.chem.utoronto.ca> mroussel@alchemy.chem.utoronto.ca (Marc Roussel) writes:

>In article <Bww9oA.LJI@NCoast.ORG> brown@NCoast.ORG (Stan Brown) writes:
>>>M_PI, M_PI_2, M_PI_4, M_SQRT2, M_E, M_LOG2E, M_LOG10E, M_LN2, M_LN10
>>
>>I question this.  Perhaps in the particular compiler you were using
>>those constants were defined, but I don't recall anything resembling
>>them in _any_ C compiler I've ever used.

>     For the record, these things are in the HP-UX, Sun S5R2, Apollo
>ANSI/XOPEN and Borland Turbo C++ versions of math.h.  Can anyone name a
>recent compiler whose math.h does NOT include these?  (I'm satisfied
>even if they are buried under an #ifdef.)


Certainly: they are in none of the C compilers I have: Microsoft C 5.1
and MicroWay C.

In fact, I have **never** seen  them in any compiler I have ever used.
The MicroWay non-ANSI math.h has a PI and a LIBM_PI but none of the
ones you mention. However, I never use that one, as I use ANSI C.

I would object very strongly if they were in any math.h file unless buried
under a #if __something (the leading underscores are necessary to make it a 
legal ANSI C compiler.

Doug McDonald