#include <iostream>

int main()
{
        int n,m,a;
        int* p;
        int *q;
        p=&n; q=&m;
        *p=100; *q=200;
        std::cout<<"n,m ="<<n<<","<<m<<std::endl;
        std::cout<<"*p="<<*p<<", *q="<<*q<<std::endl;
        std::cout<<"p ="<<p<<", q ="<<q<<", &n="<<&n<< std::endl;
        std::cout<<"-----------------"<<std::endl;
        int &rA=a;
        a=100;
        std::cout<<"a="<<a<<"  rA="<<rA<<std::endl;
        a=200;
        std::cout<<"a="<<a<<"  rA="<<rA<<std::endl;
        rA=300;
        std::cout<<"a="<<a<<"  rA="<<rA<<std::endl;
        return 0;
}

==============output============================
n,m =100,200
*p=100, *q=200
p =0x22ccb4, q =0x22ccb0, &n=0x22ccb4
-----------------
a=100  rA=100
a=200  rA=200
a=300  rA=300