MATH_ERRNO, MATH_ERREXCEPT, math_errhandling
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| Definido en el archivo de encabezado <cmath>
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| #define MATH_ERRNO 1 |
(desde C++11) | |
| #define MATH_ERREXCEPT 2 |
(desde C++11) | |
| #define math_errhandling /*implementation defined*/ |
(desde C++11) | |
El
math_errhandling constante macro expande una expresión de int tipo que es o bien igual a MATH_ERRNO, o igual a MATH_ERREXCEPT, o igual a su OR bit a bit (MATH_ERRNO | MATH_ERREXCEPT) .Original:
The macro constant
math_errhandling expands to an expression of type int that is either equal to MATH_ERRNO, or equal to MATH_ERREXCEPT, or equal to their bitwise OR (MATH_ERRNO | MATH_ERREXCEPT).The text has been machine-translated via Google Translate.
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El valor de
math_errhandling indica el tipo de control de errores que se lleva a cabo por los operadores de punto flotante y funciones:Original:
The value of
math_errhandling indicates the type of error handling that is performed by the floating-point operators and functions:The text has been machine-translated via Google Translate.
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| Constant
Original: Constant The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Explanation |
MATH_ERREXCEPT
|
indica que las excepciones de punto flotante se utilizan: por lo menos FE_DIVBYZERO, FE_INVALID y FE_OVERFLOW se definen en <cfenv> .
Original: indicates that floating-point exceptions are used: at least FE_DIVBYZERO, FE_INVALID, and FE_OVERFLOW are defined in <cfenv>. The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
MATH_ERRNO
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indica que las operaciones de punto flotante utilizar la variable de errno para corregir errores .
Original: indicates that floating-point operations use the variable errno to report errors. The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Los siguientes coma flotante condiciones de error se registran:
Original:
The following floating-point error conditions are recognized:
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| Esta sección está incompleta Razón: needs to be a table |
# Error de dominio (argumento de entrada está fuera del rango en el que se matemáticamente la operación definida, por ejemplo std::sqrt(-1), std::log(-1), o std::acos(2)). Si el bit se establece
MATH_ERRNO, EDOM se asigna a errno. Si el bit se establece MATH_ERREXCEPT, FE_INVALID se eleva .Original:
# Domain error (input argument is outside the range in which the operation is mathematically defined, e.g. std::sqrt(-1), std::log(-1), or std::acos(2)). If
MATH_ERRNO bit is set, EDOM is assigned to errno. If MATH_ERREXCEPT bit is set, FE_INVALID is raised.The text has been machine-translated via Google Translate.
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# Rango de error (el resultado matemático no puede ser representada como el objeto de tipo especificado, por ejemplo std::atanh(-1), std::log(0.0), std::lgamma(0.0) o). Si el bit se establece MATH_ERRNO, ERANGE se asigna a errno. Si el bit se establece MATH_ERREXCEPT, FE_DIVBYZERO o FE_OVERFLOW se eleva .
Original:
# Range error (the mathematical result cannot be represented as the object of specified type, e.g. std::atanh(-1), std::log(0.0), or std::lgamma(0.0)). If MATH_ERRNO bit is set, ERANGE is assigned to errno. If MATH_ERREXCEPT bit is set, FE_DIVBYZERO or FE_OVERFLOW is raised.
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Overflow # (el resultado matemático es finito, pero demasiado grande para ser representados sin error de redondeo extrema, por ejemplo, funciones como std::exp con argumentos suficientemente grandes). Si el bit se establece MATH_ERRNO, ERANGE se asigna a errno. Si el bit se establece MATH_ERREXCEPT, FE_OVERFLOW se eleva .
Original:
# Overflow (the mathematical result is finite, but too big to be represented without extreme roundoff error, e.g. functions such as std::exp with sufficiently large arguments). If MATH_ERRNO bit is set, ERANGE is assigned to errno. If MATH_ERREXCEPT bit is set, FE_OVERFLOW is raised.
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# Subdesbordamiento (el resultado matemático no es cero, pero demasiado pequeño para ser representado sin error de redondeo extrema, por ejemplo, el resultado es inferior a la normal, como en std::sin(subnormal) o para muchas otras funciones con argumentos subnormales). Si el bit está establecido MATH_ERRNO, ERANGE puede ser asignado a errno. Si el bit se establece MATH_ERREXCEPT, FE_UNDERFLOW puede elevarse .
Original:
# Underflow (the mathematical result is non-zero, but too small to be represented without extreme roundoff error, e.g. the result is subnormal, as in std::sin(subnormal) or for many other functions with subnormal arguments). If MATH_ERRNO bit is set, ERANGE may be assigned to errno. If MATH_ERREXCEPT bit is set, FE_UNDERFLOW may be raised.
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Ejemplo
| Esta sección está incompleta Razón: sin ejemplo |
Ver también
| excepciones de punto flotante Original: floating-point exceptions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (constante de macro) | |
| Macro que se expande para la variable de número de error local al hilo y compatible con POSIX. (variables macro) |
