vc++ 实现的GPS导航定位坐标转换，简单实用-vc++ implemented GPS navigation and positioning coordinate conversion, simple and practical

采用VC++，针对获得的GPS数据进行拉格朗日插值，获取某一时刻的位置信息。-Using VC++, Lagrange interpolation for GPS data were obtained, to obtain location information of a moment.