c语言中指向整型指针的指针的理解

 1 /*************************************************************************
 2     > File Name: ptr_ptr_int.c
 3     > Author: Mr.Yang
 4     > Purpose:演示指向整型的指针的指针
 5     > Created Time: 2017年06月03日 星期六 18时34分58秒
 6  ************************************************************************/
 7
 8 #include <stdio.h>
 9 #include <stdlib.h>
10
11 int main(void)
12 {
13         int s[] = {1,2,3,4};
14         int *p = s;
15         int **point = &p;
16
17         printf("s = %d\n",s);
18         printf("s[0] = %d\n",s[0]);
19         printf("p = %d\n",p);
20         printf("*p = %d\n",*p);
21         printf("*point = %d\n",*point);
22         printf("**point = %d\n",**point);
23
24         return 0;
25 }

执行结果：

1 s = 16519008
2 s[0] = 1
3 p = 16519008
4 *p = 1
5 *point = 16519008
6 **point = 1

由结果可知，**point = *p = s[0]    *point = p = s