fegetenv, fesetenv – cppreference.com

fegetenv, fesetenv

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< c | numeric | fenv

<metanoindex/>

 
C
 
Numerics
 
Fließkomma-Umgebung
Funktionen
Original:
Functions
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feclearexcept(C99)
fetestexcept(C99)
feraiseexcept(C99)
fegetexceptflag
fesetexceptflag		(C99)
(C99)
fegetround
fesetround		(C99)
(C99)
fegetenv
fesetenv		(C99)
feholdexcept(C99)
feupdateenv(C99)
Makro Konstanten
Original:
Macro constants
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FE_ALL_EXCEPT
FE_DIVBYZERO
FE_INEXACT
FE_INVALID
FE_OVERFLOW
FE_UNDERFLOW		(C99)
FE_DOWNWARD
FE_TONEAREST
FE_TOWARDZERO
FE_UPWARD		(C99)
FE_DFL_ENV(C99)
 
<tbody> </tbody>
definiert in Header <<fenv.h>>
int fegetenv( fenv_t* envp );
 (1)
int fesetenv( const fenv_t* envp );
 (2)

1)

Versuche, den Status der Floating-Point-Umfeld, in das Objekt zu speichern, auf die envp .
Original:
Attempts to store the status of the floating-point environment in the object pointed to by envp.
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2)

Versuche, die Floating-Point-Umgebung aus dem Objekt, auf das envp etablieren. den Wert dieser Objekt muss zuvor durch einen Aufruf zu erhaltenden feholdexcept oder fegetenv oder ein Floating-Point-Makro konstant. Wenn einer der Floating-Point-Status-Flags in envp gesetzt werden, werden sie in der Umgebung gesetzt (und sind dann prüfbar mit fetestexcept) aber die entsprechenden Gleitkomma-Exceptions werden nicht erhoben (Ausführung ohne Unterbrechung fortgesetzt)
Original:
Attempts to establish the floating-point environment from the object pointed to by envp. The value of that object must be previously obtained by a call to feholdexcept or fegetenv or be a floating-point macro constant. If any of the floating-point status flags are set in envp, they become set in the environment (and are then testable with fetestexcept), but the corresponding floating-point exceptions are not raised (execution continues uninterrupted)
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Parameter

envp -
Zeiger auf das Objekt vom Typ fenv_t die den Status hält der Floating-Point-Umgebung
Original:
pointer to the object of type fenv_t which holds the status of the floating-point environment
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Rückgabewert

0 bei Erfolg Null sonst .
Original:
0 on success, non-zero otherwise.
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Beispiel

This section is incomplete
Reason: no example

Siehe auch