c语言开发的ACAD辅助工具。txt2dxf用于将本文格式的空间模型转换成dxf格式的空间模型；dxf2txt将dxf格式的空间模型转换成本文格式的空间模型。-c language aids the development of ACAD. used to format this article txt2dxf space model dxf format into space model dxf2txt to dxf format conversion cost space model of