// Листинг 9.11.
 // Передача константных указателей на объекты

 #include <iostream>

 
  
 
  class SimpleCat
  {
     public: 
        SimpleCat();
        SimpleCat(SimpleCat&);
        ~SimpleCat();
  
     int GetAge() const { return itsAge; }
     void SetAge(int age) { itsAge = age;  }
  
     private: 
        int itsAge;
   };
  
   SimpleCat::SimpleCat()
   {
      std::cout << "Simple Cat Constructor...\n";
      itsAge = 1;
   }
  
   SimpleCat::SimpleCat(SimpleCat&)
   {
      std::cout << "Simple Cat Copy Cunstructor...\n";
   }
  
   SimpleCat::~SimpleCat()
   {
      std::cout << "Simple Cat Destructor...\n";
   }
  
   const SimpleCat & FunctionTwo (const SimpleCat & theCat);
  
   int main()
   {
      std::cout << "Making a cat...\n";
      SimpleCat Frisky;
      std::cout << "Frisky is " << Frisky.GetAge() << " years old\n";
      int age = 5;
      Frisky,SetAge(age);          // Помилка!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      std::cout << "Frisky is " << Frisky.GetAge() << " years old\n";
      std::cout << "Calling FunctionTwo...\n";
      FunctionTwo(Frisky);
      std::cout << "Frisky is " << Frisky.GetAge() << " years old\n";
      return 0;
   }
  
   // functionTwo, passes a ref to a const object
   const SimpleCat & FunctionTwo (const SimpleCat & theCat)
   {
      std::cout << "Function Two. Returning...\n";
      std::cout << "Frisky is now " << theCat.GetAge();
      std::cout << " years old \n";
      // theCat.SetAge(8); const!
      return theCat;
   }