Movatterモバイル変換

[0]ホーム
URL:

cppreference.com
Namespaces
Variants
    Actions

      std::multimap<Key,T,Compare,Allocator>::size

      From cppreference.com
      <cpp‎ |container‎ |multimap

      [edit template]
       
       
       
      std::multimap
      Member functions
      Non-member functions
      (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
      Deduction guides(C++17)
       
      size_type size()const;
      		(noexcept since C++11)
      (constexpr since C++26)

      Returns the number of elements in the container.

      Contents

      [edit]Return value

      std::distance(begin(), end())

      [edit]Complexity

      Constant.

      [edit]Example

      [edit]
      Run this code
      #include <cassert>#include <map> int main(){std::multimap<int,char> nums{{1,'a'},{1,'b'},{2,'c'},{2,'d'}};assert(nums.size()==4);}

      [edit]See also

      checks whether the container is empty
      (public member function)[edit]
      returns the maximum possible number of elements
      (public member function)[edit]
      (C++17)(C++20)
      		 returns the size of a container or array
      (function template)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/container/multimap/size&oldid=161947"
      [8]ページ先頭
      ©2009-2025 Movatter.jp