Pragma for fast floating point arithmetic

Question

I was looking for a setting that would let me do something similar to /fp:fast switch, but with pragma. Unfortunately, the below doesn't compile #pragma float_control( fast, off )

Answer 1

That does not work because the documentation clearly states that a value for a float_control pragma can be precise or except :

https://msdn.microsoft.com/en-us/library/45ec64h6.aspx

Btw, next time please specify what development environment for C++ you are using.