Add a Copy Constructor to an Existing Class

/* Dog.h */


#ifndef __DOG_H__
#define __DOG_H__
#include <string>
using namespace std;

class Dog {
private:
    string name;
    int age;
public:
        Dog(string name, int age) : name{name}, age{age} { }

//---- WRITE YOUR COPY CONSTRUCTOR BELOW THIS LINE
        Dog(Dog&);


//---- WRITE YOUR COPY CONSTRUCTOR ABOVE THIS LINE
    string get_name() {return name; }
    void set_name(string n) {name = n; }
    int get_age() {return age; }
    void set_age(int a) { age = a;}
    int get_dog_years() { return age * 7; }
    string speak() { return "Woof";}
};
#endif

========================================

/* exercise.cpp */



// ----THIS FILE IS EMPTY----
#include "Dog.h"


Dog::Dog(Dog &dog):name{dog.name}, age{dog.age}{
    printf("Copy Constructor");
}