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std::floor

提供: cppreference.com
< cpp‎ | numeric‎ | math

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C++
 
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Defined in header <cmath>
float       floor( float arg );
double      floor( double arg );
long double floor( long double arg );
double      floor( Integral arg );
 (C++11およびそれ以降)
arg超えない最も近い整数を計算.
Original:
Computes nearest integer not greater 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超えない最も近い整数
Original:
Nearest integer not greater 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] 例

このコードを実行します
#include <cmath>
#include <iostream>
 
int main()
{
    std::cout << std::fixed;
    std::cout << std::floor(12.0) << '\n';
    std::cout << std::floor(12.1) << '\n';
    std::cout << std::floor(12.5) << '\n';
    std::cout << std::floor(12.9) << '\n';
    std::cout << std::floor(13.0) << '\n';
}

出力: 

12.000000
12.000000
12.000000
12.000000
13.000000

[編集] 参照
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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(関数) [edit]
(C++11)
与えられた値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 the given value
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(関数) [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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(関数) [edit]
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