I made the following operator overloading test:

#include <iostream>
#include <string>

using namespace std;

class TestClass
{
    string ClassName;

    public:

    TestClass(string Name)
    {
        ClassName = Name;
        cout << ClassName << " constructed." << endl;
    }

    ~TestClass()
    {
        cout << ClassName << " destructed." << endl;
    }

    void operator=(TestClass Other)
    {
        cout << ClassName << " in operator=" << endl;
        cout << "The address of the other class is " << &Other << "." << endl;
    }
};

int main()
{
    TestClass FirstInstance("FirstInstance");
    TestClass SecondInstance("SecondInstance");

    FirstInstance = SecondInstance;
    SecondInstance = FirstInstance;

    return 0;
}

The assignment operator behaves as-expected, outputting the address of the other class.

Now, how would I actually assign something from the other class? For example, something like this:

void operator=(TestClass Other)
{
    ClassName = Other.ClassName;
}