&a用于指向变量

#include "stdafx.h"#include<stdio.h>int _tmain(int argc, _TCHAR* argv[]){int gnum = 8;int &Arear = gnum;printf("gnum =%x\n", gnum );printf("&gnum=%x\n", &gnum);printf("Arear=%x\n", Arear);printf("&Arear=%x\n", &Arear);Arear++;printf("gnum =%x\n", gnum);printf("&gnum=%x\n", &gnum);printf("Arear=%x\n", Arear);printf("&Arear=%x\n", &Arear); gnum++; printf("gnum =%x\n", gnum); printf("&gnum=%x\n", &gnum); printf("Arear=%x\n", Arear); printf("&Arear=%x\n", &Arear);

return 0;}

Arear  的变化会带动变量gnum的变化   反之也成立！