fegetenv
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The latest version of this topic can be found at fegetenv1.
Stores the current floating-point environment in the specified object.
Syntax
int fegetenv(
fenv_t *penv
);
Parameters
penv
Pointer to an fenv_t object to contain the current floating-point environment values.
Return Value
Returns 0 if the floating-point environment was successfully stored in penv. Otherwise, returns a non-zero value.
Remarks
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.
Requirements
| Function | C header | C++ header |
|---|---|---|
fegetenv |
<fenv.h> | <cfenv> |
For additional compatibility information, see Compatibility.