order.cpp

ThinkingC++中文版

//: C14:Order.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// Constructor/destructor order
#include <iostream>
using namespace std;

#define CLASS(ID) class ID { \
public: \
  ID(int) { cout << #ID " constructor\n"; } \
  ~ID() { cout << #ID " destructor\n"; } \
};

CLASS(Base1);
CLASS(Member1);
CLASS(Member2);
CLASS(Member3);
CLASS(Member4);

class Derived1 : public Base1 {
  Member1 m1;
  Member2 m2;
public:
  Derived1(int) : m2(1), m1(2), Base1(3) {
    cout << "Derived1 constructor\n";
  }
  ~Derived1() {
    cout << "Derived1 destructor\n";
  }
};

class Derived2 : public Derived1 {
  Member3 m3;
  Member4 m4;
public:
  Derived2() : m3(1), Derived1(2), m4(3) {
    cout << "Derived2 constructor\n";
  }
  ~Derived2() {
    cout << "Derived2 destructor\n";
  }
};

void main() {
  Derived2 d2;
} ///:~