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std::fpclassify

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fpclassify
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Defined in header <cmath>
int fpclassify( float arg );
(since C++11)
int fpclassify( double arg );
(since C++11)
int fpclassify( long double arg );
(since C++11)

Categorizes floating point value arg into the following categories: zero, subnormal, normal, infinite, NAN, or implementation-defined category.

Parameters

arg - floating point value

Return value

one of FP_INFINITE, FP_NAN, FP_NORMAL, FP_SUBNORMAL, FP_ZERO or implementation-defined type, specifying the category of arg.

See also

(C++11)
checks if the given number has finite value
(function) [edit]
(C++11)
checks if the given number is infinite
(function) [edit]
(C++11)
checks if the given number is NaN
(function) [edit]
(C++11)
checks if the given number is normal
(function) [edit]
provides an interface to query properties of all fundamental numeric types.
(class template) [edit]