每个枚举常量对应一个整形数字,很多时候可以像整形一样使用.但枚举类型也有不方便的地方.比如不能直接输出枚举类型的字符串常量.举例说明.定义了枚举类型:

typedef enum 
{
	SUNDAY,
	MONDAY,
	TUESDAY,
	WEDNESDAY,
	THURSDAY,
	FRIDAY,
	SATURDAY
} t_Week;

在程序中定义了变量t_Week vl_Week=SUNDAY;
如果想用printf("The Week is %s".,vl_Week);之类的语句直接输出The Week is SUNDAY.
是做不到的,无论采用%s或%d,或者在vl_Week前加强制类型转换.
有以下几个方法可以实现.
1.使用switch-case进行装换

char * StringDirectionT(t_Week vp_Week)
{
        switch(vp_Week)
        {
                case SUNDAY : return "SUNDAY";
                case MONDAY  : return "MONDAY";
                case TUESDAY : return "TUESDAY";
                case WEDNESDAY  : return "WEDNESDAY";
                case THURSDAY  : return "THURSDAY";
                case FRIDAY  : return "FRIDAY";
                case SATURDAY  : return "SATURDAY";
                default    : printf("Illegal direction value!\n;
        }
}

然后用语句printf("The Week is %s \n",StringDirectionT(vl_Week));
2.使用数组

char *a_Week[] = { "SUNDAY", "MONDAY", "TUESDAY","WEDNESDAY","THURSDAY","FRIDAY","FRIDAY","SATURDAY"}; 

然后直接根据vl_Week的值去对应的数组元素

3.使用宏定义

#define enumToStr(WEEEK)  "\""#WEEK"\""

printf("The Week is %s",enumToStr(vl_Week));