#define FE_DIVBYZERO /*implementation defined power of 2*/
(since C++11)#define FE_INEXACT /*implementation defined power of 2*/
(since C++11)#define FE_INVALID /*implementation defined power of 2*/
(since C++11)#define FE_OVERFLOW /*implementation defined power of 2*/
(since C++11)#define FE_UNDERFLOW /*implementation defined power of 2*/
(since C++11) #define FE_ALL_EXCEPT FE_DIVBYZERO | FE_INEXACT | \ FE_INVALID | FE_OVERFLOW | \
All these macro constants (except FE_ALL_EXCEPT) expand to integer constant expressions that are distinct powers of 2, which uniquely identify all supported floating-point exceptions. Each macro is defined only if it is supported.
The macro constant FE_ALL_EXCEPT, which expands to the bitwise OR of all other FE_*, is always defined and is zero if floating-point exceptions are not supported by the implementation.
FE_DIVBYZERO pole error occurred in an earlier floating-point operation FE_INEXACT inexact result: rounding was necessary to store the result of an earlier floating-point operation FE_INVALID domain error occurred in an earlier floating-point operation FE_OVERFLOW the result of the earlier floating-point operation was too large to be representable FE_UNDERFLOW the result of the earlier floating-point operation was subnormal with a loss of precision FE_ALL_EXCEPT bitwise OR of all supported floating-point exceptions
The implementation may define additional macro constants in <cfenv> to identify additional floating-point exceptions. All such constants begin with FE_ followed by at least one uppercase letter.
See math_errhandling for further details.
[edit] ExamplePossible output:
1.0/0.0 = inf division by zero reported 1.0/10 = 0.1 inexact result reported sqrt(-1) = -nan invalid result reported[edit] See also
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