NAME¶

std::fegetenv,std::fesetenv - std::fegetenv,std::fesetenv

Synopsis¶

Defined in header <cfenv>
int fegetenv( std::fenv_t* envp ) (1) (since C++11)
int fesetenv( const std::fenv_t* envp ); (2) (since C++11)

Manages the status of the floating-point environment.

1) Attempts to store the status of the floating-point environment in the object
pointed to by envp.
2) Attempts to establish the floating-point environment from the object pointed to
by envp. The value of that object must be previously obtained by a call to
std::feholdexcept or std::fegetenv or be a floating-point macro constant. If any of
the floating-point status flags are set in envp, they become set in the environment
(and are then testable with std::fetestexcept), but the corresponding floating-point
exceptions are not raised (execution continues uninterrupted)

Parameters¶

envp - pointer to the object of type std::fenv_t which holds the status of the
floating-point environment

Return value¶

0 on success, non-zero otherwise.

See also¶

feholdexcept saves the environment, clears all status flags and ignores all future
(C++11) errors
(function)
feupdateenv restores the floating-point environment and raises the previously raise
(C++11) exceptions
(function)
FE_DFL_ENV default floating-point environment
(C++11) (macro constant)