Movatterモバイル変換


[0]ホーム

URL:


cppreference.com
Namespaces
Variants
    Actions

      std::swap(std::valarray)

      From cppreference.com
      <cpp‎ |numeric‎ |valarray
       
       
       
      std::valarray
      Member functions
      Non-member functions
      Helper classes
      Deduction guides(C++17)
       
      Defined in header<valarray>
      template<class T>
      void swap(std::valarray<T>& lhs,std::valarray<T>& rhs)noexcept;
      (since C++11)

      Specializes thestd::swap algorithm forstd::valarray. Swaps the contents oflhs andrhs. Callslhs.swap(rhs).

      Contents

      [edit]Parameters

      lhs, rhs - valarrays whose contents to swap

      [edit]Return value

      (none)

      [edit]Complexity

      Constant.

      [edit]Example

      Run this code
      #include <iostream>#include <valarray> void print(auto rem,conststd::valarray<int>& v){std::cout<< rem<<'{';for(char sep[]{0,' ',0};auto elem: v)std::cout<< sep<< elem,*sep=',';std::cout<<"}\n";} int main(){std::valarray x{3,1,4,1,5};std::valarray y{2,7,1,8};     print("Before swap:\n""x: ", x);    print("y: ", y); std::swap(x, y);     print("After swap:\n""x: ", x);    print("y: ", y);}

      Output:

      Before swap:x: {3, 1, 4, 1, 5}y: {2, 7, 1, 8}After swap:x: {2, 7, 1, 8}y: {3, 1, 4, 1, 5}

      [edit]See also

      swaps with another valarray
      (public member function)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/numeric/valarray/swap2&oldid=157244"

      [8]ページ先頭

      ©2009-2025 Movatter.jp