operator++的输出问题

Question

#include
using namespace std;
class zuobiao
{
public:
zuobiao(int x,int y);
zuobiao &operator++();
int getx();
int gety();
private:
int Mx;
int My;
};
zuobiao& zuobiao::operator++()
{
Mx++;
My++;
return *this;
}
zuobiao::zuobiao(int x,int y)
{
Mx=x;
My=y;
}
int zuobiao::getx()
{
return Mx;
}
int zuobiao::gety()
{
return My;
}

int main()
{
zuobiao a(5,5);
cout<<(++a).getx()<<" "<<(++a).gety()<<endl;
return 0;
}
输出结果为什么是7 6，而不是6 7呢？

Answer 1

http://m.blog.csdn.net/article/details?id=7320291