std::flat_set<Key,Compare,KeyContainer>::size
From cppreference.com
| size_type size() const noexcept; |
(since 哋它亢++23) | |
Returns the number of elements in the container adaptor. Equivalent to return c.size().
Parameters
(none)
Return value
The number of elements in the container adaptor.
Complexity
Constant.
Example
The following code uses size to display the number of elements in a std::flat_set<int>:
Run this code
#include <iostream> #include <flat_set> int main() { std::flat_set<int> nums{1, 3, 5, 7}; std::cout << "nums contains " << nums.size() << " elements.\n"; }
Output:
nums contains 4 elements.
See also
| checks whether the container adaptor is empty (public member function) | |
| (哋它亢++17)(哋它亢++20) |
returns the size of a container or array (function template) |
| returns the maximum possible number of elements (public member function) |