How do I access math constants (eg. M_PI) in Visual C++ 2008?

StackOverflow https://stackoverflow.com/questions/806145

  •  03-07-2019
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Question

I want to use the math constants, such as M_PI and M_E, in Visual C++ 2008. I assumed they were defined in the cmath header.

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Solution

They are, but you also need to #define _USE_MATH_DEFINES before you #include <cmath>

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