f1007.cpp

来自「it is a usefull thing」· C++ 代码 · 共 38 行

//=====================================
// f1007.cpp
// 非虚拟多继承
//=====================================
#include<iostream>
using namespace std;
//-------------------------------------
class Furniture{
protected:
  int weight;
public:
  Furniture():weight(0){}
  void setWeight(int i){ weight =i; }
  int getWeight()const{ return weight; }
};//-----------------------------------
class Bed : public Furniture{
public:
  Bed(){}
  void sleep()const{ cout <<"Sleeping...\n"; }
};//-----------------------------------
class Sofa : public Furniture{
public:
  Sofa(){}
  void watchTV()const{ cout <<"Watching TV.\n"; }
};//-----------------------------------
class SleeperSofa : public Bed, public Sofa{
public:
  SleeperSofa() :Sofa(), Bed(){}
  void FoldOut()const{ cout <<"Fold out the sofa.\n"; }
};//-----------------------------------
int main(){
  SleeperSofa ss;
  ss.setWeight(20);                  // error 模糊的setWeight成员
  Furniture* pF = (Furniture*)&ss;   // error 模糊的Furniture*
  cout<<pF->getWeight()<<endl;
}//====================================