#include <iostream>
 using namespace std;
 #define B_BITE 100
 #define C_BITE  20

 class Burger {
     double grams;
     int toppings;
   public:
     Burger() {
         grams = 0;
         toppings = 0;
         cout << "B";
     }
     Burger(double g, int t) {
         grams = g;
         toppings = t;
         display();
     }
     Burger(const Burger& b) {
         cout << '&';
         *this = b;
         display();
     }
     Burger& operator=(const Burger& b) {
         cout << '=';
         grams = b.grams;
         toppings = b.toppings;
         return *this;
     }
     ~Burger() {
         cout << '~';
         display();
     }
     void display() const {
         cout << "B(" << grams << ',' << toppings << ')' << endl;
     }
     void operator++() { toppings++; }
     void operator++(int) { toppings += 2; }
     void bite() {
         grams -= B_BITE;
         if(grams < 0) grams = 0;
     }
 };

 class CheeseBurger : public Burger {
     double grams;
     int layers;
   public:
     CheeseBurger() {
         grams = 0;
         layers = 1;
         cout << "C";
     }
     CheeseBurger(double g, double b, int t) : Burger(b, t) {
         grams = g;
         layers = 1;
         display();
     }
     void display() const {
         cout << "C(" << grams << ',' << layers << ')' << endl;
     }
     void operator++(int) { layers++; }
     ~CheeseBurger() {
         cout << '~';
         Burger::display();
         cout << '~';
         display();
     }
     void bite() {
         Burger::bite();
         grams -= C_BITE;
         if(grams < 0) grams = 0;
     }
 };

 Burger bite(Burger& b) {
     b.bite();
     return b;
 }

 int main() {
     CheeseBurger cheeseBurger(60, 200, 3);
     Burger hamBurger, myShare;

     cout << endl;
     cheeseBurger++;
     cout << "----------" << endl;
     hamBurger = Burger(150, 2);
     cout << "----------" << endl;
     ++hamBurger;
     myShare = bite(hamBurger);
     cout << "----------" << endl;
     cheeseBurger.bite();
     myShare.bite();

     return 0;
 }