组合（8）

#ifndef
#define
#include <iostream>
using namespace std;
class print {
public:
  print();
  ~print();
  void DoPrint();

};

#endif

#include "print.h"

print::print() {
  cout << "print::print()" << endl;
}

print::~print() {
  cout << "print::~print()" << endl;
}

void print::DoPrint() {
  cout << "print::DoPrint()" << endl;
}

#ifndef
#define
#include <iostream>
#include "print.h"
using namespace std;
class computer {
public:
  computer();
  ~computer();
  void DoCpu();


  print Print;//电脑组合打印机，尽量多用组合，少用继承

};


#endif

#include "computer.h"

computer::computer() {
  cout << "computer::computer()" << endl;
}

computer::~computer() {
  cout << "computer:~:computer()" << endl;
}

void computer::DoCpu() {
  cout << "computer::DoCpu() " << endl;
}

#include "computer.h"
#include "print.h"
int main() {

  
  computer Computer;
  Computer.DoCpu();

  //组合，电脑组合打印
  Computer.Print.DoPrint();


  return 0;
}