实现了GPS从WGS-84转换BJ54坐标的功能-GPS achieves the function of WGS-84 to BJ54

高斯投影变换的VC源码，能够完成高斯变换，可以选择BJ54坐标或者西安80坐标-Gauss projection transform VC source, able to complete the Gaussian transform, or you can choose BJ54 coordinate Xi' an 80 coordinate