int x = 5; int& y = x; int* xp = &x; int* yp = &y;xp is equal to yp.也就是说，直接对reference取地址就可以了。
int x = 5; int& y = x; int* xp = &x; int* yp = &y;
c++ get the pointer from the reference
原文：http://www.cnblogs.com/hustdc/p/6542233.html
