数据转换，图形显示，单文档界面应用测试小程序-Data conversion, graphical display, single-document interface application testing program

白塞尔大地主题解算程序，程序全部源代码都附在文档中，还有解算界面。-Bessel geodetic solver, program all the source code attached to the document, as well as solving interface.

上传的文档为Huffman编码的C++实现代码，功能完备，编解码有较为详细的界面演示-Upload the document for the Huffman code C++ code, complete function, encoding and decoding have a more detailed interface demo