在出现的提示信息中输入大写字母“D”,可 显示系统当前日期；输入大写字母“T”,可显示系统当前时间；输入大写字母 “Q”，可结束程序。-in the message input capital letters "D" will show that the current system date; the importation of capital letters "T" will show that the current system; the