Return Value problems?

[coltonium]

So I got really confused.

Differences of these Return Values?
For the first two:
return Guess;| return string();

// get a value from the player
string GetGuessAndPrintBack()
{
	cout << "Enter your guess: ";
	string Guess = "";
	getline(cin, Guess);
	
	// prints the guess back
	cout << "Your guess was " << Guess << endl;
	
	cout << endl;
	return string(); // or return Guess;
}

For the others:
| return; | return 0;| return void 0;（not sure if this one exist though)
Can any of this be used in that string function above? And when do we use them? Their differences?

Thank you guys!

[socratesBleu]

Bear with me as the little voice in my head walks me through this for, hopefully, our benefit…

return Guess;
// this with return the information store in the “Guess” variable declared above your getline()

return string();
//this would return, if it works, an entire string variable however since the program is using multiple strings I am not sure it would know what information it would be referring to.

return 0;
//as I understand it, is meant to exit you out of a function and back into the “int main()”. If you already in the “int main()” it exits you out of the program as a whole… the press any key to close this window bit at the end

return; return void 0;
//not sure these work at all. My code did not run with just return…

just my thoughts, maybe someone with more experience will enlighten us further.