test.cpp

来自「Advanced Internet Programming Lecture 2 」· C++ 代码 · 共 46 行

#include <iostream>
using namespace std;
class base {
  public:
     int print_msg();

};

int base::print_msg() {
  cout << "This message is from base " << endl;
  return 0;
}

class  derived1:virtual public base {
  public:
      int print_msg() {
      cout << "This is message from derived1 "<< endl;
      return 0;
    }
};

class  derived2:virtual public base {
  public:
      int print_msg() {
      cout << "This is message from derived2 "<< endl;
      return 0;
    }
};

class derived3:public derived1,derived2 {
  public:
      int print_msg() {
      cout << "This is message from derived3 "<< endl;
      return 0;
    }
};



int main ()
{
   derived3 d;
   d.print_msg();
   return 0;	
}