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std::cos(std::valarray)

性病：：Cos%28 std：：valArray%29

Defined in header ​​
template< class T > valarray<T> cos( const valarray<T>& va ​​

中的每个元素va计算元素值的余弦。

参数

va-value array to apply the operation to

返回值

中的值的余弦的值数组。va...

注记

不合格职能%28cos%29用于执行计算。如果没有这样的功能，std::cos由于参数相关查找而使用。

函数的返回类型与std::valarray在这种情况下，替换类型具有以下属性：

  • 全const成员职能std::valarray提供。

  • std::valarray，，，std::slice_array，，，std::gslice_array，，，std::mask_array和std::indirect_array可以从替换类型构造。

  • 所有接受类型参数的函数conststd::valarray&除begin()和end()%28，因为C++14%29也应该接受替换类型。

  • 接受两个类型参数的所有函数conststd::valarray&应该接受每一个组合conststd::valarray&以及替代型。

  • 返回类型不会在最嵌套的参数类型上添加两个以上的模板嵌套级别。

可能的实施

模板<class T>值阵<T>Cos%28康复阀阵列<T>&va%29{valArray<T>Other=va；for%28t&i：其他%29{i=cos%28i%29；}

*。

例

另见

sin(std::valarray)applies the function std::sin to each element of valarray (function template)
tan(std::valarray)applies the function std::tan to each element of valarray (function template)
acos(std::valarray)applies the function std::acos to each element of valarray (function template)
coscomputes cosine (cos(x)) (function)
cos(std::complex)computes cosine of a complex number (cos(z)) (function template)

 © cppreference.com

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http：//en.cppreference.com/w/cpp/数值/valArray/cos

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