标签：探索多重继承的内存布局
探索多重继承的内存布局
class Base1
{
public :
virtual void func1()
{
cout<<"Base1::func1" <<endl;
}
virtual void func2()
{
cout<<"Base1::func2" <<endl;
}
private :
int b1 ;
};
class Base2
{
public :
virtual void func1()
{
cout<<"Base2::func1" <<endl;
}
virtual void func2()
{
cout<<"Base2::func2" <<endl;
}
private :
int b2 ;
};
class Derive : public Base1, public Base2
{
public :
virtual void func1()
{
cout<<"Derive::func1" <<endl;
}
virtual void func3()
{
cout<<"Derive::func3" <<endl;
}
private :
int d1 ;
};
typedef void (* FUNC) ();
void PrintVTable (int* VTable)
{
cout<<" 虚表地址>"<< VTable<<endl ;
for (int i = 0; VTable[i ] != 0; ++i)
{
printf(" 第%d个虚函数地址 :0X%x,->", i , VTable[i ]);
FUNC f = (FUNC) VTable[i ];
f();
}
cout<<endl ;
}
void Test1 ()
{
Derive d1 ;
int* VTable = (int*)(*( int*)&d1 );
PrintVTable(VTable );
// Base2虚函数表在对象Base1后面
VTable = (int *)(*((int*)&d1 + sizeof (Base1)/4));
PrintVTable(VTable );
}
标签：探索多重继承的内存布局
原文地址：http://10622551.blog.51cto.com/10612551/1696424
