car.cpp

Think in C++ 第二版源码

//: C14:Car.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Public composition

class Engine {
public:
  void start() const {}
  void rev() const {}
  void stop() const {}
};

class Wheel {
public:
  void inflate(int psi) const {}
};

class Window {
public:
  void rollup() const {}
  void rolldown() const {}
};

class Door {
public:
  Window window;
  void open() const {}
  void close() const {}
};

class Car {
public:
  Engine engine;
  Wheel wheel[4];
  Door left, right; // 2-door
};

int main() {
  Car car;
  car.left.window.rollup();
  car.wheel[0].inflate(72);
} ///:~