利用键扫程序从键盘输入 16进制数，由程序处理使转为键面对应的十进制数 。例输入0x01(1),0x02(2),即输入了12-Sweep procedure using keys from the keyboard input 16 hexadecimal number of treatment by the procedure so that the face should be the key to a decimal number. Example input 0x01 (1), 0x02 (2), which entered the 12