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

feupdateenv - cppreference.com

int feupdateenv( const fenv_t* envp );

(since C99)

First, remembers the currently raised floating-point exceptions, then restores the floating-point environment from the object pointed to by envp (similar to fesetenv), then raises the floating-point exceptions that were saved.

This function may be used to end the non-stop mode established by an earlier call to feholdexcept.

[edit] Parameters envp - pointer to the object of type fenv_t set by an earlier call to feholdexcept or fegetenv or equal to FE_DFL_ENV [edit] Return value

â0â on success, non-zero otherwise.

[edit] Example

Output:

current exceptions raised:  FE_INVALID
In x2():  x = inf
current exceptions raised:  FE_INEXACT FE_OVERFLOW
x2(DBL_MAX) = inf
current exceptions raised:  FE_INVALID FE_OVERFLOW

[edit] References

C11 standard (ISO/IEC 9899:2011):

7.6.4.4 The feupdateenv function (p: 214-215)

C99 standard (ISO/IEC 9899:1999):

7.6.4.4 The feupdateenv function (p: 195-196)

[edit] See also

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