#include "iostream.h"
int main()
{
    int i=3;
    int *iptr=&i;
    int **iptrptr=&iptr;
    cout<<"Address of Var i="<<iptr<<endl;
    cout<<"Data of Var i="<<*iptr<<endl;
    cout<<"Address of pointer iptr="<<iptrptr<<endl;
    cout<<"Address of Var i="<<*iptrptr<<endl;
    cout<<**iptrptr;
    *iptr=2+*iptr;
    cout<<"Data of Var i="<<*iptr<<endl;
    return 0;
}
运行结果：
Address of Var i=0x0012FF7C
Data of Var i=3
Address of pointer iptr=0x0012FF78
Address of Var i=0x0012FF7C
3Data of Var i=5
Press any key to continue

iptr表示i的内存地址.,*iptr表示i,这个还好理解,
后面的iptrptr，*iptrptr，**iptrptr分别表示什么呢？怎么理解？
谢谢大家！