常用气动函数C++类代码,适用于航空工程计算-common aerodynamic function category C code that applies to aeronautical engineering calculation

民航订票系统，适用于大学C语言课程设计，可以实现订票、退票、查询等常用功能，且代码易懂。-Civil aviation reservation systems, apply to the University of the C language curriculum design, booking, a refund, query and other common functions can be achieved, and to understand the code.

测量学中常用的高斯坐标相关转换知识，以及邻带转换等的代码-Surveying commonly used Gaussian coordinate transformation related knowledge, and neighbors with conversion code