std::feholdexcept
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definiert in Header <cfenv> | ||
int feholdexcept(std::fenv_t* envp ) | (seit C++11) | |
Zunächst wird die aktuelle Floating-Point-Umgebung, um das Objekt, auf das
envp (ähnlich std::fegetenv), dann löscht alle Floating-Point-Status-Flags, und installiert dann die Non-Stop-Modus: Zukunft Gleitkomma-Ausnahmen werden nicht unterbrechen Ausführung ( nicht einfangen), bis die Floating-Point-Umgebung durch std::feupdateenv wiederhergestellt oder 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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Diese Funktion kann in den Anfang eines Unterprogramms, das die Floating-Point-Ausnahmen ist es aus der Anruferliste erhöhen kann verstecken muss verwendet werden. Wenn nur einige Ausnahmen müssen unterdrückt werden, während andere müssen gemeldet werden, wird der Non-Stop-Modus in der Regel mit einem Aufruf an std::feupdateenv nach dem Löschen der unerwünschten Ausnahmen beendet .
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.
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[Bearbeiten]Parameter
| envp | - | Zeiger auf das Objekt vom Typ std::fenv_t wo das Floating-Point-Umgebung gespeichert werden 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. |
[Bearbeiten]Rückgabewert
0 bei Erfolg Null sonst .
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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[Bearbeiten]Siehe auch
(C++11) | stellt die Floating-Point-Umgebung und stellt die zuvor Ausnahmen auslösen 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. (Funktion) |
(C++11) | speichert oder stellt die aktuelle Floating-Point-Umgebung 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. (Funktion) |
(C++11) | Standardmäßig Floating-Point-Umgebung 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. (Makro konstant) |
