c++ Programming Glossary: isnan

http://stackoverflow.com/questions/13940316/floating-point-comparison-revisited

T a const T b const unsigned ulps 4 Handle NaN. if std isnan a std isnan b return false typedef std numeric_limits T limits.. T b const unsigned ulps 4 Handle NaN. if std isnan a std isnan b return false typedef std numeric_limits T limits Handle very..

check NaN number

http://stackoverflow.com/questions/3437085/check-nan-number

You can either look for a function macro actually like isnan in math.h for C and cmath for C or just use the property that.. If for some bizarre reason your C implementation has no isnan it should since the standard mandates it you can code your own..

Negative NaN is not a NaN?

http://stackoverflow.com/questions/3596622/negative-nan-is-not-a-nan

the tests check for the result of a NaN. I tried using std isnan but the assert failes Assertion `std isnan x ' failed. After.. tried using std isnan but the assert failes Assertion `std isnan x ' failed. After printing the value of x it turned out it's.. GCC in this case was optimising away the comparison and isnan returned false was because someone in my team had turned on..

Checking if a double (or float) is nan in C++

http://stackoverflow.com/questions/570669/checking-if-a-double-or-float-is-nan-in-c

if a double or float is nan in C is there an isnan function p.s. I'm in mingw if that makes a difference UPDATE.. UPDATE Thanks for the responses I had this solved by using isnan form math.h which doesn't exist in cmath which I was #include..