一个老外写的非常好用的虚拟数码管类.可以设置各种颜色,有7段数码管和13段数码管可以选择,还可以自定义大小,非常不错!包内有此类的说明文档,其中包括所有的函数用法!-Written by a foreigner is very easy to use virtual digital tube can be set to a variety of colors, 7-segment LED and 13 to choose from, you can also customize the size, very good! Package have this kind of documentation, including the use of all functions!