#include <iostream>
using namespace std;

class A
{
    public:
        int m;
        int* p;
};

int main()
{
    A s;
    s.m = 10;
    cout<<s.m<<endl; //10
    s.p = &s.m;
    () = 5;
    cout<<s.m<<endl; //5
    return 0;
}