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MATH_ERRNO, MATH_ERREXCEPT, math_errhandling

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< cpp‎ | numeric‎ | math

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C++
 
ニューメリックスライブラリ
一般的な数学関数
浮動小数点環境
複素数
数値配列
擬似乱数生成
コンパイル時有理数演算 (C++11)
汎用の数値演算
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
一般的な数学関数
機能します
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Functions
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基本操作
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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)
指数関数
Original:
Exponential functions
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exp
exp2(C++11)
expm1(C++11)
log
log10
log1p(C++11)
log2(C++11)
電源機能
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Power functions
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sqrt
cbrt(C++11)
hypot(C++11)
pow
三角関数や双曲線関数
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Trigonometric and hyperbolic functions
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sinh
cosh
tanh
asinh(C++11)
acosh(C++11)
atanh(C++11)
エラーおよびガンマ関数
Original:
Error and gamma functions
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erf(C++11)
erfc(C++11)
lgamma(C++11)
tgamma(C++11)
最も近い整数の浮動小数点演算
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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)
点操作関数に浮かぶ
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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)
分類/比較
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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)
マクロ定数
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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
 (C++11およびそれ以降)
#define MATH_ERREXCEPT    2
 (C++11およびそれ以降)
#define math_errhandling  /*implementation defined*/
 (C++11およびそれ以降)
マクロ定数math_errhandlingかintに等しい、またはMATH_ERRNOに等しい、またはそれらのビット単位のOR（MATH_ERREXCEPT）に等しいタイプMATH_ERRNO | MATH_ERREXCEPTの式に展開されます.
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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math_errhandlingの値は、浮動小数点の演算子と関数が実行され、エラー処理のタイプを示します
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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定数
Original:
Constant
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 Explanation
MATH_ERREXCEPT
使用されているが、その浮動小数点の例外を示します。少なくともFE_DIVBYZERO、FE_INVALID、とFE_OVERFLOWが<cfenv>で定義されています.
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
その浮動小数点演算がエラーを報告するために変数を使用errno示し.
Original:
indicates that floating-point operations use the variable errno to report errors.
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次のような浮動小数点エラー条件が認識されます：
Original:
The following floating-point error conditions are recognized:
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This section is incomplete
Reason: needs to be a table
＃ドメイン·エラー（入力引数は、操作が数学的に定義されている範囲外で、例えばstd::sqrt(-1)、std::log(-1)、またはstd::acos(2)）。 MATH_ERRNOビットがセットされている場合、EDOMはerrnoに割り当てられています。 MATH_ERREXCEPTビットがセットされている場合、FE_INVALIDが発生します.
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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＃範囲エラー（数学的な結果は、指定された型のオブジェクト、例えばstd::atanh(-1)、std::log(0.0)、またはstd::lgamma(0.0)として表現することはできません）。 MATH_ERRNOビットがセットされている場合、ERANGEはerrnoに割り当てられています。 MATH_ERREXCEPTビットがセットされている場合、またはFE_DIVBYZEROFE_OVERFLOW上昇させる.
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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＃オーバーフロー（数学的な結果が有限であるが、極端な丸め誤差なく表現するには大きすぎるような十分な大きさの引数を持つstd::expとして例えば関数）。 MATH_ERRNOビットがセットされている場合、ERANGEはerrnoに割り当てられています。 MATH_ERREXCEPTビットがセットされている場合、FE_OVERFLOWが発生します.
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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＃アンダーフローは、（数学的結果は非ゼロですが、極端な丸め誤差なく表現するには小さすぎる、std::sin(subnormal)内または非正規の引数を持つ他の多くの機能のために、結果が非​​正規であるなど）。 MATH_ERRNOビットがセットされている場合、ERANGEはerrnoに割り当てられることがあります。 MATH_ERREXCEPTビットがセットされている場合、FE_UNDERFLOWが発生する場合があります.
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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[編集] 例

This section is incomplete
Reason: no example

[編集] も参照してください

(C++11)
浮動小数点例外
Original:
floating-point exceptions
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(マクロ定数) [edit]
POSIX準拠のスレッドローカルなエラー番号variable
(マクロ変数)に展開されるマクロ
Original:
macro which expands to POSIX-compatible thread-local error number variable
(マクロ変数)
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[edit]
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