枚举类型在C语言的定义

 enum 枚举名
                { 枚举值表 };
      例：enum weekday{sun, mon, tue, wed, thu, fri, sat};
              enum weekday  week_end, workday;
      或 enum weekday{sun,mon,tue,wed,thu,fri,sat}workday;
           或 enum {sun,mon,tue,wed,thu,fri,sat}week_end;