C++ 如何使用复制构造函数

问：

所以我试图在我的主要中创建一个副本，就像这样myCat

#include<iostream>
#include<string>
using namespace std;

class Cat
{
private:
   string name;
   string breed;
   int age;
   static constexpr double licenseFee = 10;

public:
   void setCatData(string, string, int);
   void showCat();
   void displayAddress(Cat mycat);

   Cat(){
   }
   
   Cat(const Cat &aCat) { //copy constructor
      name = aCat.name;
      breed = aCat.breed;
      age = aCat.age;
   }
 
};


void Cat::setCatData(string catName, string catBreed, int catAge)
{
   name = catName;
   breed = catBreed;
   age = catAge;
}

void Cat::showCat()
{
  cout << "Cat: " << name << " is a " << breed << endl;
  cout << "The cat's age is " << age << endl;
  cout << "License fee: $" << licenseFee << endl;
}

void Cat::displayAddress(Cat myCat) {

cout << "The address of the object is: "<< &myCat;

}

int main()
{
     Cat myCat;
     Cat myCat2 = myCat; //coppy constructor called

     cout << "ORIGNAL CAT" << endl;
     myCat.setCatData("Tigger", "Fluffy unit", 3);
     myCat.showCat(); 
     cout << endl;
     //myCat.displayAddress(myCat);
     cout << "COPY CAT" << endl;
     myCat2.showCat();
   
}

但是，没有复制任何内容，我的输出就是这样

ORIGNAL CAT
Cat: Tigger is a Fluffy unit
The cat's age is 3
License fee: $10

COPY CAT
Cat:  is a
The cat's age is 1
License fee: $10

我不确定为什么 myCat2 不包含相同的数据是 myCat？