int feholdexcept( fenv_t* envp );
(since C99)First, saves the current floating-point environment to the object pointed to by envp (similar to fegetenv), then clears all floating-point status flags, and then installs the non-stop mode: future floating-point exceptions will not interrupt execution (will not trap), until the floating-point environment is restored by feupdateenv or fesetenv.
This function may be used in the beginning of a subroutine that must hide the floating-point exceptions it may raise from the caller. If only some exceptions must be suppressed, while others must be reported, the non-stop mode is usually ended with a call to feupdateenv after clearing the unwanted exceptions.
[edit] Parameters envp - pointer to the object of type fenv_t where the floating-point environment will be stored [edit] Return valueâ0â on success, non-zero otherwise.
[edit] ExampleOutput:
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
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