Showing content from https://cplusplus.com/fegetexceptflag below:
function
<cfenv>
fegetexceptflag
int fegetexceptflag (fexcept_t* flagp, int excepts);
Get floating-point exception flags
Attempts to store a representation of the floating-point exceptions specified by excepts into the fexcept_t object pointed by flagp.
Parameters
-
flagp
-
Pointer to a fexcept_t object where the representation is stored.
-
excepts
-
Bitmask value: A combination (with bitwise OR) of any number of floating-point exception values supported by the implementation:
macro value description FE_DIVBYZERO Pole error: division by zero, or some other asymptotically infinite result (from finite arguments). FE_INEXACT Inexact: the result is not exact. FE_INVALID Domain error: At least one of the arguments is a value for which the function is not defined. FE_OVERFLOW Overflow range error: The result is too large in magnitude to be represented as a value of the return type. FE_UNDERFLOW Underflow range error: The result is too small in magnitude to be represented as a value of the return type. FE_ALL_EXCEPT All exceptions (selects all of the exceptions supported by the implementation). Certain library implementations may support additional floating-point exception values (with their corresponding macros also beginning with FE_).
Libraries may define in
<fenv.h>
only the macro values above they support (the others may not be defined).
At least all of the above macro values are defined in
<cfenv>
(even if not supported by the implementation).
Return Value Zero, if the representation was successfully stored.
A non-zero value otherwise.
Data races Concurrently calling this function is safe, causing no data races.
ExceptionsNo-throw guarantee: this function never throws exceptions.
See also
-
fesetexceptflag
-
Set floating-point exception flags (function)
-
feholdexcept
-
Hold floating-point exceptions (function)
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