Stores the current floating-point environment in the specified object.
int fegetenv( fenv_t *penv );
Pointer to an fenv_t object to contain the current floating-point environment values.
Returns 0 if the floating-point environment was successfully stored in penv. Otherwise, returns a non-zero value.
The fegetenv function stores the current floating-point environment in the object pointed to by penv. The floating point environment is the set of status flags and control modes that affect floating-point calculations. This includes the rounding direction mode and the status flags for floating-point exceptions. If penv does not point to a valid fenv_t object, subsequent behavior is undefined.
To use this function, you must turn off floating-point optimizations that could prevent access by using the
#pragma fenv_access(on) directive prior to the call. For more information, see fenv_access.
|Function||C header||C++ header|
For additional compatibility information, see Compatibility.