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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../numeric/fenv/feexceptflag.html below:

std::fegetexceptflag, std::fesetexceptflag - cppreference.com

(1) (since C++11) (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.

[edit] 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 [edit] Return value

​0​ on success, non-zero otherwise.

[edit] See also

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