Standard library header <cfenv>
From cppreference.com
This header was originally in the C standard library as <fenv.h>.
This header is part of the floating-point environment library.
Contents |
[edit]Types
| fenv_t | The type representing the entire floating-point environment |
| fexcept_t | The type representing all floating-point status flags collectively |
[edit]Functions
(C++11) | clears the specified floating-point status flags (function) |
(C++11) | determines which of the specified floating-point status flags are set (function) |
(C++11) | raises the specified floating-point exceptions (function) |
(C++11)(C++11) | copies the state of the specified floating-point status flags from or to the floating-point environment (function) |
(C++11)(C++11) | gets or sets rounding direction (function) |
(C++11) | saves or restores the current floating point environment (function) |
(C++11) | saves the environment, clears all status flags and ignores all future errors (function) |
(C++11) | restores the floating-point environment and raises the previously raise exceptions (function) |
[edit]Macros
| floating-point exceptions (macro constant) | |
| floating-point rounding direction (macro constant) | |
(C++11) | default floating-point environment (macro constant) |
[edit]Synopsis
namespace std {// typestypedef/*object type*/ fenv_t;typedef/*integer type*/ fexcept_t; // functionsint feclearexcept(int except);int fegetexceptflag(fexcept_t *pflag, int except);int feraiseexcept(int except);int fesetexceptflag(const fexcept_t *pflag, int except);int fetestexcept(int except);int fegetround(void);int fesetround(int mode);int fegetenv(fenv_t *penv);int feholdexcept(fenv_t *penv);int fesetenv(const fenv_t *penv);int feupdateenv(const fenv_t *penv);}
