基于51单片机的数字钟设计.设计一个数字钟，采用六个数码管，高两位显示小时，中间两位显示分钟，低两位显示秒，时间显示采用24小时制。-51 microcontroller based digital clock design to design a digital clock, using six digital, high two-hour show, the middle two shows minutes, seconds, show a low two, 24-hour time dis