std:: fegetexceptflag, std:: fesetexceptflag

From cppreference.com
Floating-point environment
Functions
fegetexceptflag fesetexceptflag
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
Macro constants
(C++11)
Defined in header <cfenv>
int fegetexceptflag ( std:: fexcept_t * flagp, int excepts ) ;
(1) (since C++11)
int fesetexceptflag ( const std:: fexcept_t * flagp, int excepts ) ;
(2) (since C++11)

1) Attempts to obtain the full contents of the floating-point exception flags that are listed in the bitmask argument excepts , which is a bitwise OR of the floating point exception macros .

2) Attempts to copy the full contents of the floating-point exception flags that are listed in excepts from flagp into the floating-point environment. Does not raise any exceptions, only modifies the flags.

The full contents of a floating-point exception flag is not necessarily a boolean value indicating whether the exception is raised or cleared. For example, it may be a struct which includes the boolean status and the address of the code that triggered the exception. These functions obtain all such content and obtain/store it in flagp in implementation-defined format.

Parameters

flagp - pointer to an std:: fexcept_t object where the flags will be stored or read from
excepts - bitmask listing the exception flags to get/set

Return value

0 on success, non-zero otherwise.

See also

C documentation for fegetexceptflag , fesetexceptflag