ccright.cpp

来自「Think in C++ 2nd」· C++ 代码 · 共 61 行

//: C14:Ccright.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Correctly synthesizing the CC
#include <iostream>
using namespace std;

class Parent {
  int i;
public:
  Parent(int ii) : i(ii) {
    cout << "Parent(int ii)\n";
  }
  Parent(const Parent& b) : i(b.i) {
    cout << "Parent(Parent&)\n";
  }
  Parent() :i(0) { cout << "Parent()\n"; }
  friend ostream&
    operator<<(ostream& os, const Parent& b) {
    return os << "Parent: " << b.i << endl;
  }
};

class Member {
  int i;
public:
  Member(int ii) : i(ii) {
    cout << "Member(int ii)\n";
  }
  Member(const Member& m) : i(m.i) {
    cout << "Member(Member&)\n";
  }
  friend ostream&
    operator<<(ostream& os, const Member& m) {
    return os << "Member: " << m.i << endl;
  }
};

class Child : public Parent {
  int i;
  Member m;
public:
  Child(int ii) : Parent(ii), i(ii), m(ii) {
    cout << "Child(int ii)\n";
  }
  friend ostream&
    operator<<(ostream& os, const Child& d){
    return os << (Parent&)d << d.m
              << "Child: " << d.i << endl;
  }
};

int main() {
  Child d(2);
  cout << "calling copy-constructor: " << endl;
  Child d2 = d; // Calls copy-constructor
  cout << "values in d2:\n" << d2;
} ///:~