完整的时钟显示程序，包括年，月，日，星期，时，分，秒的显示，并且可以用按键修改，且可以将当前信息保存到EEPROM中-Complete clock display program, including year, month, day, week, hour, minute, seconds display, and can be modified with buttons, and current information can be saved to the EEPROM in the