data segment    ;定义数据段     infon db 0dh,0ah,'Please input a year: $'     Y db 0dh,0ah,'This is a leap year! $'     N db 0dh,0ah,'This is not a leap year! $'     w dw

该程序实现的是一个电子钟的功能，该电子钟可以实时显示年月日，还有预约和闹铃的功能-this program to achieve a function of an electronic clock ,which can be real-time display date, as well as appointments and alarm functions