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std::trunc

提供: cppreference.com
< cpp‎ | numeric‎ | math

 
 
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
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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)
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
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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
Original:
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
Original:
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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FP_NORMAL
FP_SUBNORMAL
FP_ZERO
FP_INFINITE
FP_NAN
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
 
Defined in header <cmath>
float       trunc( float arg );
(C + + 11以来)
double      trunc( double arg );
(C + + 11以来)
long double trunc( long double arg );
(C + + 11以来)
double      trunc( Integral arg );
(C + + 11以来)
argよりも大きさが大きくない最も近い整数を計算.
Original:
Computes nearest integer not greater in magnitude than arg.
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目次

[編集] パラメータ

arg -
浮動小数点値
Original:
floating point value
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[編集] 値を返します

argよりも大きさが大きくない最も近い整数.
Original:
Nearest integer not greater in magnitude than arg.
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[[Image:
値を返します
Original:
{{{2}}}
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|200x200px]]
Argument

[編集] ノート

整数値は、常に与えられた浮動小数点型で表現できる.
Original:
The integer value can be always represented by the given floating point type.
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[編集] も参照してください

最も近い整数ではありません指定された値より大きい
Original:
nearest integer not greater than the given value
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(機能) [edit]
最も近い整数ではない与えられた値よりも小さい
Original:
nearest integer not less than the given value
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(機能) [edit]
(C++11)
(C++11)
(C++11)
最も近い整数値、中間値の場合でゼロから離れる丸め
Original:
nearest integer, rounding away from zero in halfway cases
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(機能) [edit]