std::queue size() method
- od C++98
// Const version only
size_type size() const
Returns the number of elements in the underlying container, that is, c.size()
.
Parameters
(none)
Return value
The number of elements in the container.
Complexity
Constant - O(1).
Example
Main.cpp
#include <algorithm>
#include <iostream>
#include <queue>
int main()
{
std::queue<int> container;
std::cout << "Initially, container.size(): " << container.size() << '\n';
for (int i = 0; i < 7; ++i)
container.push(i);
std::cout << "After adding elements, container.size(): " << container.size() << '\n';
}
Output
Initially, container.size(): 0
After adding elements, container.size(): 7