std::cos<div class="t-tr-text">（性病:: valarray的）<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::valarray)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

 

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通用的數值運算 Original: Generic numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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std::valarray

成員函數 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
valarray::valarray valarray::~valarray valarray::operator= valarray::operator[] valarray::swap valarray::size valarray::resize valarray::sum valarray::min valarray::max valarray::shift valarray::cshift valarray::apply	valarray::operator+ valarray::operator- valarray::operator~ valarray::operator! valarray::operator+= valarray::operator-= valarray::operator*= valarray::operator/= valarray::operator%= valarray::operator&= valarray::operator|= valarray::operator^= valarray::operator<<= valarray::operator>>=
非成員函數 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
swap （C++11） begin （C++11） end （C++11） abs exp log log10 pow sqrt sin cos tan asin acos atan atan2 sinh cosh tanh	operator* operator/ operator% operator+ operator- operator^ None operator& operator| operator<< operator>> operator&& operator None operator== operator!= operator< operator> operator<= operator>=
Helper類 Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
slice_array gslice_array indirect_array	slice gslice mask_array

 

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

For each element in va computes cosine of the value of the element.

參數

va

-

值的數組的操作 Original: value array to apply the operation to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

Value array containing cosines of the values in va.

注釋

碎末功能（cos）是用來執行計算。如果這種功能是不可用的，std::cos由於參數依賴查找.

Original:

Unqualified function (cos) is used to perform the computation. If such function is not available, std::cos is used due to argument dependent lookup.

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該功能可以實現從std::valarray不同的返回類型。在這種情況下，替換類型具有以下屬性：

Original:

The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:

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• const提供的所有std::valarray成員函數.

  Original:

  All const member functions of std::valarray are provided.

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• std::valarray，std::slice_array，std::gslice_array，std::mask_array和std::indirect_array可以由更換型.

  Original:

  std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.

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• 所有的函數接受一個參數的類型const std::valarray&也應接受替換類型.

  Original:

  All functions accepting a arguments of type const std::valarray& should also accept the replacement type.

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• 接受兩個參數的類型const std::valarray&應該接受所有的功能const std::valarray&的每個組合和置換型.

  Original:

  All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.

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可能的實現

template<class T> valarray<T> cos(const valarray<T>& va) { valarray<T> other = va; for (T &i : other) { i = cos(i); } }