*p++，*++p，*(p++)，*(++p)

直接上代码:

 #include <stdio.h>
 #include <stdlib.h>

 int main ()
 {
   int arry[] = {,,,};
   int val = ;
   int *p, *tmp;

   p = &arry[];
   val = *p;
   printf("p->0x%x, val=%d\n", p, val);

   tmp = p;
   val = *p++;
   printf("*p++:   p->0x%x, val=%d\n", p, val);
   p = tmp;

   tmp = p;
   val = *++p;
   printf("*++p:   p->0x%x, val=%d\n", p, val);
   p = tmp;

   tmp = p;
   val = *(p++);
   printf("*\(p++\): p->0x%x, val=%d\n", p, val);
   p = tmp;

   tmp = p;
   val = *(++p);
   printf("*\(++p\): p->0x%x, val=%d\n", p, val);
   p = tmp;

   return ;
 }

输出:

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

结论: 括号很重要