std::multiset<Key,Compare,Allocator>:: size
From cppreference.net
C++
Containers library
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(C++26)
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std::multiset
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size_type size
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const
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(自 C++11 起为 noexcept)
(自 C++26 起为 constexpr) |
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返回容器中的元素数量。
目录 |
返回值
std:: distance ( begin ( ) , end ( ) )
复杂度
常量。
示例
运行此代码
#include <cassert> #include <set> int main() { std::multiset<int> nums{4, 2, 4, 2}; assert(nums.size() == 4); }
参见
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检查容器是否为空
(公开成员函数) |
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返回可能容纳的最大元素数
(公开成员函数) |
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(C++17)
(C++20)
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返回容器或数组的大小
(函数模板) |