Return: Quiz III in C++

Quiz: What would this code produce if we were to copy-paste it in a code editor and run it?

string get_greeting(string name) {
	cout << "Hey, " + name << endl;
}

void mainFunction() {
	string greeting = get_greeting("Andy");
	cout << greeting << endl;
}

Important Note:

Do not use an actual code editor to get the answer! It would defy the whole purpose of the quiz!