Namespace
Varianti

FE_DIVBYZERO, FE_INEXACT, FE_INVALID, FE_OVERFLOW, FE_UNDERFLOW, FE_ALL_EXCEPT

Da cppreference.com.
< c‎ | numeric‎ | fenv

 
 
 
Floating point ambiente
Funzioni
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)
Macro costanti
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)
 
Defined in header <<fenv.h>>
#define FE_DIVBYZERO    /*implementation defined power of 2*/
#define FE_INEXACT      /*implementation defined power of 2*/
#define FE_INVALID      /*implementation defined power of 2*/
#define FE_OVERFLOW     /*implementation defined power of 2*/
#define FE_UNDERFLOW    /*implementation defined power of 2*/
#define FE_ALL_EXCEPT  FE_DIVBYZERO | FE_INEXACT | \

                       FE_INVALID | FE_OVERFLOW |  \

                       FE_UNDERFLOW
Tutte queste costanti macro (ad eccezione FE_ALL_EXCEPT) espandersi in interi espressioni costanti che sono potenze di 2 distinti, che identificano in modo univoco tutti supportati eccezioni a virgola mobile. Ogni macro è definito solo se supportato.
Original:
All these macro constants (except FE_ALL_EXCEPT) expand to integer constant expressions that are distinct powers of 2, which uniquely identify all supported floating-point exceptions. Each macro is only defined if it is supported.
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Il FE_ALL_EXCEPT macro costante, che espande alla OR fra tutti FE_* altri, è sempre definito e se è zero virgola mobile eccezioni non sono supportati dall'implementazione.
Original:
The macro constant FE_ALL_EXCEPT, which expands to the bitwise OR of all other FE_*, is always defined and is zero if floating-point exceptions are not supported by the implementation.
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Constant
Original:
Constant
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Explanation
FE_DIVBYZERO
divisione per zero durante l'operazione precedente virgola mobile
Original:
division by zero occurred during the earlier floating-point operation
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FE_INEXACT
inesatta risultato: arrotondamento è necessario memorizzare il risultato dell'operazione precedente virgola mobile
Original:
inexact result: rounding was necessary to store the result of the earlier floating-point operation
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FE_INVALID
operazione non valida: l'operazione precedente a virgola mobile non potevano eseguire
Original:
invalid operation: the earlier floating-point operation could not performed
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FE_OVERFLOW
il risultato del precedente virgola mobile è troppo grande per essere rappresentabile
Original:
the result of the earlier floating-point operation was too large to be representable
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FE_UNDERFLOW
il risultato dell'operazione precedente virgola mobile era subnormale
Original:
the result of the earlier floating-point operation was subnormal
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FE_ALL_EXCEPT
OR bit per bit di tutte le versioni eccezioni a virgola mobile
Original:
bitwise OR of all supported floating-point exceptions
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L'implementazione può definire costanti macro supplementari <fenv.h> per individuare ulteriori eccezioni a virgola mobile. Tutte le costanti iniziano con tali FE_ seguita da almeno una lettera maiuscola.
Original:
The implementation may define additional macro constants in <fenv.h> to identify additional floating-point exceptions. All such constants begin with FE_ followed by at least one uppercase letter.
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[modifica] Vedi anche

C++ documentation for floating point exception macros