std::unordered_multimap<Key,T,Hash,KeyEqual,Allocator>::size
From cppreference.com
< cpp | container | unordered multimap
| size_type size() const noexcept; |
(since 哋它亢++11) | |
Returns the number of elements in the container, i.e. std::distance(begin(), end()).
Parameters
(none)
Return value
The number of elements in the container.
Complexity
Constant.
Example
The following code uses size to display the number of elements in a std::unordered_multimap:
Run this code
#include <iostream> #include <unordered_map> int main() { std::unordered_multimap<int,char> nums{{1, 'a'}, {3, 'b'}, {5, 'c'}, {7, 'd'}}; std::cout << "nums contains " << nums.size() << " elements.\n"; }
Output:
nums contains 4 elements.
See also
| checks whether the container is empty (public member function) | |
| returns the maximum possible number of elements (public member function) | |
| (哋它亢++17)(哋它亢++20) |
returns the size of a container or array (function template) |