基于c语言的单片机数字时钟设计

要求：设计一个数字时钟，显示范围为00：00：00~23：59：59。通过几个开关进行控制，其中开关K1用于切换时间设置（调节时钟）和时钟运行（正常运行）状态；开关K2用于切换修改时、分、秒数值；开关K3用于使相应数值加1调节；开关K4用于减1调节；开关K5用于设定闹钟，闹钟同样可以设定初值，并且设定好后到时间通过蜂鸣器发出声音

-C language-based single-chip digital clock design: Design of a digital clock display from 00:00:00 to 23:59:59. Through the several switch control, the switch K1 for the state of the switching time settings (adjust the clock) and clock operation (normal operation)　switch K2 for the switch to modify the hours, minutes, seconds value　switch K3 used to value plus 1 regulation　switch K4 is used to reduce an adjustment　switch K5 is used to set the alarm clock, alarm clock can also set the initial value, and set to the time the buzzer sounds