[求助]这里的this是什么意思？
#include<iostream.h>class pair
{
char c1,c2;
public:
void set(char b)
{c1=1+(c2=b);}
unsigned where_am_I()
{ return ((unsigned)this); }//什么意思？
void print()
{cout<<c1<<"+"<<c2<<"\t";}
};
void main()
{
pair a,b,c;
a.set('A');
b.set('b');
c.set('c');
a.print();
cout<<"is at"<<a.where_am_I()<<'\n';
b.print();
cout<<"is at"<<b.where_am_I()<<'\n';
c.print();
cout<<"is at"<<c.where_am_I()<<'\n';
}
