Namespace
Varianti

fegetenv, fesetenv

Da cppreference.com.
< c‎ | numeric‎ | fenv

Defined in header <<fenv.h>>
int fegetenv( fenv_t* envp );
(1)
int fesetenv( const fenv_t* envp );
(2)
1)
tentativi di memorizzare lo stato della virgola mobile ambiente nell'oggetto puntato da envp.
Original:
Attempts to store the status of the floating-point environment in the object pointed to by envp.
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2)
tenta di stabilire la virgola mobile ambiente dall'oggetto puntato da envp. Il valore di questo oggetto deve essere precedentemente ottenuto da una chiamata a feholdexcept o fegetenv o essere a virgola mobile macro costante. Se uno dei virgola mobile indicatori di stato si trovano in envp, diventano situato in un ambiente (e sono quindi testabili con fetestexcept), ma le corrispondenti eccezioni a virgola mobile non vengono generati (esecuzione continua senza interruzioni)
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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Indice

[modifica] Parametri

envp -
Puntatore all'oggetto di tipo fenv_t che detiene lo status di floating-point ambiente
Original:
pointer to the object of type fenv_t which holds the status of the floating-point environment
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[modifica] Valore di ritorno

0 in caso di successo, non-zero altrimenti.
Original:
0 on success, non-zero otherwise.
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[modifica] Esempio

[modifica] Vedi anche

salva l'ambiente, cancella tutti i flag di stato e ignora tutti gli errori futuri
Original:
saves the environment, clears all status flags and ignores all future errors
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(funzione) [edit]
ripristina la virgola mobile e solleva l'ambiente precedentemente generare eccezioni
Original:
restores the floating-point environment and raises the previously raise exceptions
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(funzione) [edit]
predefinito in virgola mobile ambiente
Original:
default floating-point environment
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(macro costante) [edit]
C++ documentation for fegetenv, fesetenv