用结构体实现成员体执行函数，求交流

#include <iostream>
using namespace std;
void xym(int x,int y) //debug=4011BD release=401000
{
cout<<x<<","<<y<<endl;
}
void xym01(int x,int y) //debug=4010EB release=401000
{
cout<<y<<","<<x<<endl;
}
void xym02()
{
cout<<"hello world"<<endl;
}
struct xym03{
public:
typedef void (*p)(int,int);
p p1,p2;
};
int main(int xymc,char *xymv[])
{
xym03 a;
a.p1=xym;
a.p1(5,6);
a.p2=a.p1;
cout<<"p2函数指针中存的地址为："<<a.p2<<endl;
return 0;
}