时钟仿真程序，可实现多种显示方式 包括12/24小时制、是否显示秒数-clock simulation program can achieve a variety of formats, including 12/24 hours System, which is shown in seconds

vs下用c#窗体程序编写的时钟程序，可以选择12小时显示或者24小时显示，有整点报时功能，通过获取系统时间得到时钟的时间-vs c# Forms program written with clock program, you can select the 12-hour display or 24-hour display, the whole point timekeeping function by getting the system time clock time