Espaços nominais
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MATH_ERRNO, MATH_ERREXCEPT, math_errhandling

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< cpp‎ | numeric‎ | math

 
 
Biblioteca numéricos
Funções matemáticas comuns
De ponto flutuante ambiente
Números complexos
Matrizes numéricas
Pseudo-aleatório de geração de números
Tempo de compilação aritmética racional (C++11)
Genéricos operações numéricas
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Funções matemáticas comuns
Funções
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Functions
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Operações básicas
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Basic operations
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remainder(C++11)
remquo(C++11)
fma(C++11)
fmax(C++11)
fmin(C++11)
fdim(C++11)
nan
nanf
nanl
(C++11)
(C++11)
(C++11)
Funções exponenciais
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Exponential functions
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exp
exp2(C++11)
expm1(C++11)
log
log10
log1p(C++11)
log2(C++11)
Funções de poder
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Power functions
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sqrt
cbrt(C++11)
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pow
Funções trigonométricas e hiperbólicas
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C++11)
acosh(C++11)
atanh(C++11)
Erro e funções gamma
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Error and gamma functions
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erf(C++11)
erfc(C++11)
lgamma(C++11)
tgamma(C++11)
Número inteiro mais próximo de operações de ponto flutuante
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Nearest integer floating point operations
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ceil
floor
round
lround
llround
(C++11)
(C++11)
(C++11)
trunc(C++11)
nearbyint(C++11)
rint
lrint
llrint
(C++11)
(C++11)
(C++11)
Flutuando funções de manipulação de pontos
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Floating point manipulation functions
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ldexp
scalbn
scalbln
(C++11)
(C++11)
ilogb(C++11)
logb(C++11)
frexp
modf
nextafter
nexttoward
(C++11)
(C++11)
copysign(C++11)
Classificação / Comparação
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Classification/Comparison
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fpclassify(C++11)
isfinite(C++11)
isinf(C++11)
isnan(C++11)
isnormal(C++11)
signbit(C++11)
isgreater(C++11)
isgreaterequal(C++11)
isless(C++11)
islessequal(C++11)
islessgreater(C++11)
isunordered(C++11)
Constantes de macros
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Macro constants
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HUGE_VALF
HUGE_VAL
HUGE_VALL
(C++11)

(C++11)
INFINITY(C++11)
NAN(C++11)
math_errhandling
MATH_ERRNO
MATH_ERREXCEPT
(C++11)
FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
 
Defined in header <cmath>
#define MATH_ERRNO        1
(a partir do C++ 11)
#define MATH_ERREXCEPT    2
(a partir do C++ 11)
#define math_errhandling  /*implementation defined*/
(a partir do C++ 11)
A constante math_errhandling macro expande para uma expressão de int tipo que, ou é igual a MATH_ERRNO, ou igual a MATH_ERREXCEPT, ou igual à sua bitwise OR (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).
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O valor de math_errhandling indica o tipo de tratamento de erro que é executado pelos operadores de ponto flutuante e funções:
Original:
The value of math_errhandling indicates the type of error handling that is performed by the floating-point operators and functions:
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Constante
Original:
Constant
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Explanation
MATH_ERREXCEPT
indica que exceções de ponto flutuante são usados: pelo menos FE_DIVBYZERO, FE_INVALID e FE_OVERFLOW são definidos em <cfenv> .
Original:
indicates that floating-point exceptions are used: at least FE_DIVBYZERO, FE_INVALID, and FE_OVERFLOW are defined in <cfenv>.
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MATH_ERRNO
indica que as operações de ponto flutuante usar o errno variável para reportar erros .
Original:
indicates that floating-point operations use the variable errno to report errors.
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As seguintes condições de ponto flutuante de erro são reconhecidas:
Original:
The following floating-point error conditions are recognized:
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# Erro de domínio (argumento de entrada está fora da faixa em que a operação é matematicamente definido, por exemplo std::sqrt(-1), std::log(-1), ou std::acos(2)). Se o bit é definido MATH_ERRNO, EDOM é atribuído a errno. Se o bit é definido MATH_ERREXCEPT, FE_INVALID é levantada.
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.
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# Erro Range (o resultado matemático não pode ser representado como o objeto do tipo especificado, por exemplo std::atanh(-1), std::log(0.0), std::lgamma(0.0) ou). Se o bit é definido MATH_ERRNO, ERANGE é atribuído a errno. Se o bit é definido MATH_ERREXCEPT, FE_DIVBYZERO ou FE_OVERFLOW é levantada.
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 (resultado matemático é finito, mas grande demais para ser representado, sem erro de arredondamento extrema por exemplo, funções como std::exp com argumentos suficientemente grandes). Se o bit é definido MATH_ERRNO, ERANGE é atribuído a errno. Se o bit é definido MATH_ERREXCEPT, FE_OVERFLOW é levantada.
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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# Underflow (o resultado matemático é diferente de zero, mas muito pequeno para ser representado sem um erro de arredondamento extrema, por exemplo, o resultado é subnormal, como em std::sin(subnormal) ou para muitas outras funções com argumentos subnormais). Se o bit é definido MATH_ERRNO, ERANGE pode ser atribuído a errno. Se o bit é definido MATH_ERREXCEPT, FE_UNDERFLOW podem ser levantadas.
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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[editar] Exemplo

[editar] Veja também

exceções de ponto flutuante
Original:
floating-point exceptions
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(macro constante) [edit]
macro que se expande para POSIX compatível variable
(variável macro) número de segmento local de erro
Original:
macro which expands to POSIX-compatible thread-local error number variable
(variável macro)
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[edit]