前述：C语言的奥秘，博大精深，今天来回忆的分析函数指针，函数指针数组的用法。具体请见下面一个注册程序的实现。
1 #include <stdio.h>
2 #include <string.h>
3
5
6 typedef void (*poniter_fun)(int); //定义一个函数指针
7
8 typedef struct poniter_desc {
9 char *name;
10 poniter_fun fp;
11 } poniter_desc,*p_poniter_desc;
12
13 poniter_desc poniter_array[10];
14 p_poniter_desc p_poniter_array;
15
16 int register_fun(char *name,poniter_fun fp) //注册函数
17 {
18 int i;
19 for(i=0;i<10;i++)
20 {
21 if(!poniter_array[i].fp)
22 {
23 poniter_array[i].name=name; poniter_array[i].fp=fp;
25 return 0;
26 }
27 }
28 return -1;
29 }
30 int unregister_fun(char *name,poniter_fun fp) //注销函数
31 {
32 int i;
33 for(i=0;i<10;i++)
34 {
35 if(!strcmp(poniter_array[i].name,name))
36 {
37 poniter_array[i].name=NULL;
38 poniter_array[i].fp=NULL;
39 return 0;
40 }
41 } return -1;
43 }
44 void run(void) //调用
45 {
46 poniter_array[0].fp(1);
47 poniter_array[1].fp(2);
48 }
49
50 void first(int i)
51 {
52 printf("this is first fun%d \r\n",i);
53 }
54
55 void second(int i)
56 {
57 printf("this is second fun%d \r\n",i);
58 }
59
60
61
62 void main()
63 {
65 register_fun("first",first); //将函数加入注册函数
66 register_fun("second",second);
67 run();
68 }
下面为函数相应的输出结果
[email protected]:~/myFile/fun_ponit$ ls register register.c [email protected]:~/myFile/fun_ponit$ ./register this is first fun 1 this is second fun 2