fegetenv1.md

description	title	ms.date	api_name	api_location	api_type	topic_type	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: fegetenv	fegetenv	04/05/2018	fetegenv	msvcrt.dll msvcr80.dll msvcr90.dll msvcr100.dll msvcr100_clr0400.dll msvcr110.dll msvcr110_clr0400.dll msvcr120.dll msvcr120_clr0400.dll ucrtbase.dll api-ms-win-crt-runtime-l1-1-0.dll	DLLExport	apiref	fegetenv fenv/fegetenv	fetegenv function	68962421-6978-4b27-8e4c-ad1577830cf6

fegetenv

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, it 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 environment includes the rounding direction mode and the status flags for floating-point exceptions. If penv doesn't 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 more compatibility information, see Compatibility.

See also

Alphabetical function reference
fesetenv