多级指针

#include <stdio.h>void g(int ** q){//**q是&p //*q 是p printf("%d\n",**q); }void f(){int i=20; int * p = &i;g(&p);  //p是int*类型，那么&p是int**类型 } void main(){int i = 10;int * p = &i;int ** q = &p;int *** r = & q;printf("%d\n",***r); f(); }