std::feholdexcept
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Déclaré dans l'en-tête <cfenv> | ||
int feholdexcept(std::fenv_t* envp ) | (depuis C++11) | |
Tout d'abord, permet d'économiser le courant à virgule flottante environnement à l'objet pointé par
envp (semblable à std::fegetenv), puis efface tous les indicateurs d'état à virgule flottante, puis installe le mode non-stop: à venir exceptions de virgule flottante ne sera pas interrompre l'exécution ( ne retient pas), jusqu'à ce que l'environnement en virgule flottante est restauré par std::feupdateenv ou std::fesetenv .Original:
First, saves the current floating-point environment to the object pointed to by
envp (similar to std::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 std::feupdateenv or std::fesetenv.The text has been machine-translated via Google Translate.
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Cette fonction peut être utilisée au début d'un sous-programme qui doit cacher les exceptions en virgule flottante, il peut porter de l'appelant. Si seulement quelques exceptions doivent être supprimés, tandis que d'autres doivent être déclarées, le mode non-stop est généralement terminée par un appel à std::feupdateenv après avoir effacé les exceptions non désirées .
Original:
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 std::feupdateenv after clearing the unwanted exceptions.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[modifier]Paramètres
| envp | - | pointeur vers l'objet de std::fenv_t type où l'environnement en virgule flottante sont stockés Original: pointer to the object of type std::fenv_t where the floating-point environment will be stored The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[modifier]Retourne la valeur
0 en cas de succès, non nuls autrement .
Original:
0 on success, non-zero otherwise.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[modifier]Voir aussi
(C++11) | restaure l'environnement en virgule flottante et soulève le lever des exceptions précédemment Original: restores the floating-point environment and raises the previously raise exceptions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) |
(C++11) | sauvegarde ou restaure l'environnement actuel point flottant Original: saves or restores the current floating point environment The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) |
(C++11) | défaut en virgule flottante environnement Original: default floating-point environment The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (constante macro) |
