Example 7 demonstrates the principle of least surprise as follows:

#include <queue>
#include <iostream>

int main(void)
{
    std::queue<int> my_queue;

    my_queue.emplace(42);
    std::cout << "The answer is: " << my_queue.front() << '
';
    my_queue.pop();

    return 0;
}

As shown in the preceding example, we are showing you how a std::queue can be used to add integers to a queue, output the queue to stdout, and remove elements from the queue. The point of this example is to highlight the fact that C++ already has a standard set of naming conventions that should be leveraged during C++ library development.

If you are designing a new library, it is helpful to the user of your library to use the same naming conventions that C++ has already defined. Doing so will lower the barrier to entry and provide a more intuitive API.