invalid conversion from 'int' to 'main()::Week' [-fpermissive]

#include <stdio.h>
#include <time.h>




int main()
{
	enum Week 
{
	sun,mon,tue,wed,thu,fri,sat
};
	enum Week today;
	struct tm *p;
	time_t t;
	
	time(&t);
	p=localtime(&t);
	today=(enum Week)p->tm_wday;//必须强制类型转换 
	switch(today)
	{
		case mon:
		case tue:
		case wed:
		case thu:
		case fri:
			printf("工作日\n");
			break;
		case sat:
		case sun:
			printf("休息日\n");
		default:
			printf("Error\n");
	}
	return 0;
} 

 解决办法：

today=(enum Week)p->tm_wday;//必须强制类型转换