通过偏移量来访问C++类数据成员实验

#include
  
   
using namespace std;
class MyClass
{
public:
	MyClass()
	{
		ma = 12;
		mb = 32;
	}
public :
	int ma;
	int mb;
};
int main()
{
	MyClass mc;
	MyClass * p = &mc;
	//求出偏移量指针
	int  MyClass:: * pa = &MyClass::ma;
	int MyClass:: * pb = &MyClass::mb;
	void * pv = p;
	unsigned char * pc = (unsigned char * )pv;
	//求出偏移量数值
	int nOffa = reinterpret_cast
   
    (*(void**)(&pa));//将其转化为整型量。 int nOffb = reinterpret_cast
    
     (*(void**)(&pb));//将其转化为整型量。 //加上偏移量 pc += (nOffb ); //求出该成员的值 int b = *(reinterpret_cast
     






      (pc)); pc = (unsigned char * )pv; pc += (nOffa ); int a = *(reinterpret_cast
      
       (pc)); cout<<"a:"<
        
        
//输出：
 
        
a:12
 b:32
        
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