text: 
  # ifndef _CAO_
  # define _CAO_
  
  # include "Animal.h"
  
  class Cao: public Animal {
  		int peso;
  	public:
  		Cao(int i, std::string n, int p);
  		int getPeso() const;
  		void ladrar();
  		bool operator==(Cao &cao);
  		friend std::ostream& operator<<(std::ostream &os, const Cao &c);
  };
  
  # endif
  