{ theHour++; theMinute = 0; } if (theHour == 24) // “小时”逢24进一 { theHour = 0; } switch (theHour) // 动态判断出“不同时段问候语” { case 0: case 1: case 2: case 3: case 4: case 5: saying = "凌晨好!你怎么不睡觉?"; break; case 6: case 7: saying = "早晨好!该吃早餐了!"; break; case 8: case 9: case 10: saying = "上午好!你要好好工作哦!"; break; case 11: case 12: case 13: saying = "中午好!及时吃午餐,然后要午休一会儿哦!"; break; case 14: case 15: case 16: case 17: saying = "下午好!这个时间有些疲惫,工作时千万不要打盹儿哦!"; break; case 18: case 19: saying = "傍晚好!该吃晚餐了!"; break; case 20: case 21: saying = "晚上好!要好好放松一下哦!";