C语言--用地址调用函数

01#include <stdio.h>
02  
03typedef unsigned short  UNSIGNED16;
04typedef unsigned char   UNSIGNED8;
05typedef UNSIGNED16 (*DEMO_CYCLE)(void);
06  
07static UNSIGNED16 lp_demo(void);
08static UNSIGNED16 ap_demo(void);
09static UNSIGNED16 md_demo(void);
10static UNSIGNED16 mixed_demo(void);
11  
12DEMO_CYCLE  p_demo_cycle = NULL;
13DEMO_CYCLE  p_demo_cycle_group[4] = {lp_demo, ap_demo, md_demo, mixed_demo};
14UNSIGNED8   demo_type;
15  
16static UNSIGNED16 lp_demo(void)
17{
18    printf("lp_demo执行这里\n");
19    return 0;
20}
21static UNSIGNED16 ap_demo(void)
22{
23    printf("ap_demo执行这里\n");
24    return 0;
25}
26static UNSIGNED16 md_demo(void)
27{
28    printf("md_demo执行这里\n");
29    return 0;
30}
31static UNSIGNED16 mixed_demo(void)
32{
33    printf("mixed_demo执行这里\n");
34    return 0;
35}
36  
37int main(int argc, char *argv[])
38{
39    UNSIGNED16  result = 0;
40    printf("%d\n",demo_type);
41        //获取函数地址
42    p_demo_cycle = p_demo_cycle_group[demo_type];
43        //利用函数地址调用函数
44        result = (*p_demo_cycle)();
45    return 0;
46}

#include <stdio.h>

typedef unsigned short	UNSIGNED16;
typedef unsigned char   UNSIGNED8;
typedef UNSIGNED16 (*DEMO_CYCLE)(void);

static UNSIGNED16 lp_demo(void);
static UNSIGNED16 ap_demo(void);
static UNSIGNED16 md_demo(void);
static UNSIGNED16 mixed_demo(void);

DEMO_CYCLE 	p_demo_cycle = NULL;
DEMO_CYCLE 	p_demo_cycle_group[4] = {lp_demo, ap_demo, md_demo, mixed_demo};
UNSIGNED8 	demo_type;

static UNSIGNED16 lp_demo(void)
{
	printf("lp_demo执行这里\n");
	return 0;
}
static UNSIGNED16 ap_demo(void)
{
	printf("ap_demo执行这里\n");
	return 0;
}
static UNSIGNED16 md_demo(void)
{
	printf("md_demo执行这里\n");
	return 0;
}
static UNSIGNED16 mixed_demo(void)
{
	printf("mixed_demo执行这里\n");
	return 0;
}

int main(int argc, char *argv[])
{
	UNSIGNED16  result = 0;
	printf("%d\n",demo_type);
        //获取函数地址
	p_demo_cycle = p_demo_cycle_group[demo_type];
        //利用函数地址调用函数
		result = (*p_demo_cycle)();
	return 0;
}
函数名字符串指针:利用函数地址调用函数.同时利用数组的形式.以更加方便的形式进行操作

转载于:https://my.oschina.net/u/239287/blog/69917

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