C#开发的一个简易计算器，打开项目即可测试、编译！-C# Developed a simple calculator, open the project to the test, the compiler!

protues仿真数字时钟，液晶显示年月日，时分秒，星期，同时可通过按键进行时间的设置。-protues simulation digital clock, LCD year, month, day, hour, minute and second, day of week, and time settings by pressing a button.