Espacios de nombres
Variantes
Acciones

std::fegetenv, std::fesetenv

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< cpp‎ | numeric‎ | fenv

 
 
Numéricos biblioteca
Funciones matemáticas comunes
Floating-point medio ambiente
Los números complejos
Matrices numéricas
Pseudo-aleatoria de generación de números
En tiempo de compilación aritmética racional (C++11)
Genéricos operaciones numéricas
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Floating-point medio ambiente
Funciones
Original:
Functions
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feclearexcept(C++11)
fetestexcept(C++11)
feraiseexcept(C++11)
fegetexceptflag
fesetexceptflag
(C++11)
(C++11)
fegetround
fesetround
(C++11)
(C++11)
fegetenv
fesetenv
(C++11)
feholdexcept(C++11)
feupdateenv(C++11)
Constantes Macro
Original:
Macro constants
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FE_ALL_EXCEPT
FE_DIVBYZERO
FE_INEXACT
FE_INVALID
FE_OVERFLOW
FE_UNDERFLOW
(C++11)
FE_DOWNWARD
FE_TONEAREST
FE_TOWARDZERO
FE_UPWARD
(C++11)
FE_DFL_ENV(C++11)
 
Defined in header <cfenv>
int fegetenv( std::fenv_t* envp )
(1) (desde C++11)
int fesetenv( const std::fenv_t* envp );
(2) (desde C++11)
1)
intenta almacenar el estado del entorno de punto flotante en el objeto al que apunta envp .
Original:
Attempts to store the status of the floating-point environment in the object pointed to by envp.
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2)
Los intentos de establecer el entorno de coma flotante del objeto apuntado por envp. El valor de esa objeto debe ser obtenido previamente por una llamada a std::feholdexcept o std::fegetenv o una macro de punto flotante constante. Si cualquiera de los indicadores de estado de coma flotante se encuentra en envp, ellos se encuentra en el medio ambiente (y luego son contrastables con std::fetestexcept), pero las correspondientes excepciones de punto flotante no resucitan (ejecución continúa sin interrupción)
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 std::feholdexcept or std::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 std::fetestexcept), but the corresponding floating-point exceptions are not raised (execution continues uninterrupted)
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[editar] Parámetros

envp -
Puntero al objeto de std::fenv_t tipo que tiene la condición de el entorno de coma flotante
Original:
pointer to the object of type std::fenv_t which holds the status of the floating-point environment
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[editar] Valor de retorno

0 en caso de éxito, no cero en caso contrario .
Original:
0 on success, non-zero otherwise.
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[editar] Ver también

protege el medio ambiente, se borran todos los indicadores de estado y hace caso omiso de todos los errores en el futuro
Original:
saves the environment, clears all status flags and ignores all future errors
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(función) [edit]
restaura el entorno de coma flotante y plantea la anteriormente lanzar excepciones
Original:
restores the floating-point environment and raises the previously raise exceptions
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(función) [edit]
defecto de punto flotante de medio ambiente
Original:
default floating-point environment
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(macro constante) [edit]