A problem caused by C++ function overloading...

 Do you know the output of below code?

#include <iostream>

using namespace std;

int move(const int& x)

{

        cout << "hello\n";

        return 2;

}

int main()

{

        int x = 1;

        cout << move(x);

}

Actually, the function "move" defined here was not called at all!

The one called is std::move() defined in STL library.

The reasson is move(x) matches std::move(int&) more than move(const int& x) defined here.

So, be careful!!!