C++ overloading cout's << operator for length class

operator_overloading.cpp

// Written by Javed Ahmed - F2019266402
#include <iostream>
using namespace std;

class Length
{
private:
    int distance;
public:
	Length(){
        this->distance = 0;
	}
	Length(int distance){
		this->distance = distance;
	}
	friend ostream& operator << (ostream& out, Length& op);
};

ostream& operator << (ostream& out, Length& op){
	cout << "The Total Length is =  ";
	out << op.distance << endl;
	return out;
}

int main()
{
	Length d(45);
	cout << d << endl;
	return 0;
}