声明一个表示时间的结构体，可以精确表示年、月、日、小时、分、秒；提示用户输入年、月、日、小时、分、秒的值，然后完整地显示出来。-A statement said the structure of time, can accurately represent year, month, day, hour, minute, second　prompts the user to enter the year, month, day, hour, minute, seconds values, and then completely displayed.