/*虚继承*/
#include "stdafx.h"
#include <iostream.h>
class furniture
{
public:
furniture( int nWeight )
{
m_nWeight = nWeight;
cout << "家具的构造" << endl;
}
int m_nWeight;
};
//虚继承
//使派生类对象只有一份基类(furniture)的拷贝
//在菱形继承下，在上面的两个继承关系中，加上虚继承
class Safa : virtual public furniture
{
public:
Safa( int nWeight ):furniture(nWeight)
{
cout << "沙发的构造" << endl;
}
void sit()
{
}
};
class Bed : virtual public furniture
{
public:
Bed( int nWeight ):furniture(nWeight)
{
cout << "床的构造" << endl;
}
void sleep()
{
}
};
//构造顺序，先是虚基类
//在是非虚基类，按声明的顺序构造
class SafaBed :public Bed,public Safa
{
public:
SafaBed( int nWeight ): Safa(nWeight),Bed(nWeight),furniture(nWeight)
{
Bed::m_nWeight = nWeight;
cout << "沙发床的构造" << endl;
}
};
int main(int argc, char* argv[])
{
SafaBed theSafaBed(100);
furniture* pFurniture = (Bed*)&theSafaBed;
theSafaBed.sit();
theSafaBed.sleep();
cout << sizeof(theSafaBed) << endl;
return 0;
}