了解更多知识请点我：学习C语言之路（汇总篇)

个人校验器书写程序找问题

#include <stdio.h> 
#include <stdbool.h>

#define newRangeChecker(min,max) {(RangeChecker),(min),(max)}
#define newOddChecker(odd) {(OddChecker),(odd)}

typedef bool (const* CHECKER)(void *checker,int value);

typedef struct{
	CHECKER checker;
	int min;
	int max;
}CHECKERSTRUCT;

typedef struct{
	CHECKER checker;
	int odd;
}ODDCHECKER;


bool RangeChecker(void *pdate,int value)
{
	CHECKERSTRUCT temp = (CHECKERSTRUCT *)pdate;
	return (temp.min < value  && temp.max > value); 
}
bool OddChecker(void *pdate,int value)
{
	ODDCHECKER temp = (ODDCHECKER *)pdate;
	return (temp.odd % 2); 
}
void CheckerExecute(void *pdata,int value)
{
	CHECKER temp = (CHECKER)pdata;
	return temp(&pdata,value);
}

int main()
{
	CHECKERSTRUCT chcker = newRangeChecker(1,10);
	printf("chcker = %d\n",CheckerExecute(&chcker,4));
}

• 问题一：
  错误：typedef bool (const* CHECKER)(void *checker,int value);
  改为：typedef bool (*const CHECKER)(void *checker,int value);
• 问题二：
  错误：CHECKERSTRUCT temp = (CHECKERSTRUCT *)pdate;
  改为：CHECKERSTRUCT *temp = (CHECKERSTRUCT *)pdate;
  因为结构体不是指针
• 问题三：
  错误：CHECKERSTRUCT temp = (CHECKERSTRUCT *)pdate;
  改为：CHECKERSTRUCT *temp = (CHECKERSTRUCT *)pdate;
  因为结构体不是指针
• 问题四：
  错误：CHECKER temp = (CHECKER)pdata;
  改为：CHECKER temp = * ((CHECKER *)pdata);

这个我也不知道为什么，求助个为大佬解释下！！！！！！

改完后：

#include <stdio.h> 
#include <stdbool.h>

#define newRangeChecker(min,max) {(RangeChecker),(min),(max)}
#define newOddChecker(odd) {(OddChecker),(odd)}

typedef bool (*const CHECKER)(void *checker,int value);

typedef struct{
	CHECKER checker;
	int min;
	int max;
}CHECKERSTRUCT;

typedef struct{
	CHECKER checker;
	int odd;
}ODDCHECKER;


bool RangeChecker(void *pdate,int value)
{
	CHECKERSTRUCT *temp = (CHECKERSTRUCT *)pdate;
	return (temp->min < value  && temp->max > value); 
}
bool OddChecker(void *pdate,int value)
{
	ODDCHECKER *temp = (ODDCHECKER *)pdate;
	return (temp->odd % value == 0); 
}
bool CheckerExecute(void *pdata,int value)
{
	CHECKER temp = *((CHECKER*)pdata);
	return temp(pdata,value);
}

int main()
{
	CHECKERSTRUCT chcker = newRangeChecker(1,10);
	ODDCHECKER oddchecker = newOddChecker(3);
	printf("chcker = %d\n",CheckerExecute(&chcker,4));
	printf("chcker = %d\n",CheckerExecute(&oddchecker,6));
}

运行结果：