C語言--用地址調用函數

時間 2019-12-14

標籤 c語言地址調用函數简体版

原文原文鏈接

 
   01 
   #include <stdio.h>  
  
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    typedef unsigned short  UNSIGNED16;  
   
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    typedef unsigned char   UNSIGNED8;  
   
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    typedef UNSIGNED16 (*DEMO_CYCLE)(void);  
   
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    static UNSIGNED16 lp_demo(void);  
   
    08 
    static UNSIGNED16 ap_demo(void);  
   
    09 
    static UNSIGNED16 md_demo(void);  
   
    10 
    static UNSIGNED16 mixed_demo(void);  
   
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    DEMO_CYCLE  p_demo_cycle = NULL;  
   
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    DEMO_CYCLE  p_demo_cycle_group[4] = {lp_demo, ap_demo, md_demo, mixed_demo};  
   
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    UNSIGNED8   demo_type;  
   
    15 
       
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    static UNSIGNED16 lp_demo(void)  
   
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    {  
   
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        printf("lp_demo執行這裏\n");  
   
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        return 0;  
   
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    }  
   
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    static UNSIGNED16 ap_demo(void)  
   
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    {  
   
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        printf("ap_demo執行這裏\n");  
   
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        return 0;  
   
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    }  
   
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    static UNSIGNED16 md_demo(void)  
   
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    {  
   
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        printf("md_demo執行這裏\n");  
   
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        return 0;  
   
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    }  
   
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    static UNSIGNED16 mixed_demo(void)  
   
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    {  
   
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        printf("mixed_demo執行這裏\n");  
   
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        return 0;  
   
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    }  
   
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    int main(int argc, char *argv[])  
   
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    {  
   
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        UNSIGNED16  result = 0;  
   
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        printf("%d\n",demo_type);  
   
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            //獲取函數地址  
   
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        p_demo_cycle = p_demo_cycle_group[demo_type];  
   
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            //利用函數地址調用函數  
   
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            result = (*p_demo_cycle)();  
   
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        return 0;  
   
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    } 
   
 #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執行這裏\n");
	return 0;
}
static UNSIGNED16 ap_demo(void)
{
	printf("ap_demo執行這裏\n");
	return 0;
}
static UNSIGNED16 md_demo(void)
{
	printf("md_demo執行這裏\n");
	return 0;
}
static UNSIGNED16 mixed_demo(void)
{
	printf("mixed_demo執行這裏\n");
	return 0;
}

int main(int argc, char *argv[])
{
	UNSIGNED16  result = 0;
	printf("%d\n",demo_type);
        //獲取函數地址
	p_demo_cycle = p_demo_cycle_group[demo_type];
        //利用函數地址調用函數
		result = (*p_demo_cycle)();
	return 0;
} 

  函數名字符串指針:利用函數地址調用函數.同時利用數組的形式.以更加方便的形式進行操做

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