*p++，*++p，*(p++)，*(++p)

直接上代码:

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 
 4 int main ()
 5 {
 6   int arry[] = {0,1,2,3};
 7   int val = 888;
 8   int *p, *tmp;
 9 
10   p = &arry[0];
11   val = *p;
12   printf("p->0x%x, val=%d\n", p, val);
13 
14   tmp = p;
15   val = *p++;
16   printf("*p++:   p->0x%x, val=%d\n", p, val);
17   p = tmp;
18 
19   tmp = p;
20   val = *++p;
21   printf("*++p:   p->0x%x, val=%d\n", p, val);
22   p = tmp;
23 
24   tmp = p;
25   val = *(p++);
26   printf("*\(p++\): p->0x%x, val=%d\n", p, val);
27   p = tmp;
28 
29   tmp = p;
30   val = *(++p);
31   printf("*\(++p\): p->0x%x, val=%d\n", p, val);
32   p = tmp;
33 
34   return 0;
35 }

输出:

p->0xbf975cd4, val=0
*p++:   p->0xbf975cd8, val=0
*++p:   p->0xbf975cd8, val=1
*(p++): p->0xbf975cd8, val=0
*(++p): p->0xbf975cd8, val=1

结论: 括号很重要

posted @ 2015-04-16 15:49  HelloMarvin  阅读(486)  评论(0)  编辑  收藏  举报