#pragma once
class Engine
{
public:
  Engine();
  ~Engine();
};
Engine.h

#include <iostream>
#include "Engine.h"
using namespace std;

Engine::Engine()
{
  cout << "調(diào)用構(gòu)造函數(shù):Engine()" << endl;
}

Engine::~Engine()
{
  cout << "調(diào)用析構(gòu)函數(shù):~Engine()" << endl;
}
Engine.cpp

#pragma once
#include "Engine.h"

class Car
{
public:
  Car();
  ~Car();
private:
  Engine m_eCar;
};
Car.h

#include <iostream>
#include "Car.h"
using namespace std;

Car::Car()
{
  cout << "調(diào)用構(gòu)造函數(shù):Car()" << endl;
}

Car::~Car()
{
  cout << "調(diào)用析構(gòu)函數(shù):~Car()" << endl;
}
Car.cpp