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std::valarray::sum

提供: cppreference.com
< cpp‎ | numeric‎ | valarray

 
 
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
 
std::valarray
メンバ関数
Original:
Member functions
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非メンバ関数
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Non-member functions
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ヘルパークラス
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Helper classes
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T sum() const;
要素の和を計算.
Original:
Computes the sum of the elements.
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関数はoperator+=がタイプT定義されている場合にのみ使用することができます。 std::valarrayが空の場合、動作は未定義です。要素は、この関数によって処理される順序は不定である.
Original:
The function can be used only if operator+= is defined for type T. If the std::valarray is empty, the behavior is undefined. The order in which the elements are processed by this function is unspecified.
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目次

[編集] パラメータ

(なし)
Original:
(none)
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[編集] 値を返します

要素の和.
Original:
The sum of the elements.
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[編集]

#include <iostream>
#include <valarray>
 
int main()
{
    std::valarray<int> a = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    std::cout << a.sum() << '\n';
}

Output:

55

[編集] も参照してください

applies a function to every element of a valarray
(パブリックメンバ関数) [edit]
要素の範囲をまとめている
Original:
sums up a range of elements
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(関数テンプレート) [edit]