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Asked: 2026-06-18T04:58:33+00:00

Possible Duplicate: round() for float in C++ I used mingw and eclipse with c++98

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Possible Duplicate:
round() for float in C++

I used mingw and eclipse with c++98 on my laptop. But on my pc I have vs2012.

Now I have a small problem, the math library seems to be completely different.

in c++98 I had access to round and M_PI with math.h. But in vs2012 it isn’t there anymore. I made a google search and found the following reference http://en.cppreference.com/w/cpp/numeric/math/round

But round is not in cmath and it is not in math.h either. Also I am unable to find M_PI

Is there another math library?

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1 Answer

  1. Editorial Team

    These are new in C++11. MinGW had it before because of C compat, but VS2012 is not a C99 compiler. M_PI is probably the same story. IOW, you were relying on implementation-specific behaviour with MinGW, now it’s Standard behaviour but VS hasn’t upgraded quite yet.

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