用于测量与地图制图的高斯投影转换，提供了北京54、全国80、WGS84三个坐标系下的正算、反算。输出结果精确到小数点后7位。-for measuring and mapping the Gauss projection conversion, the Beijing 54, 80, three WGS84 coordinates the count is, anti-counting. Output accurate to seven decimal places.

完成北京54坐标系与wgs84坐标系的相互转换，界面中输入84坐标系的经纬度值，回车即可得到对应的54坐标，通过在主函数中修改代码，可以完成两种程序的任意转换-Complete Beijing 54 coordinate system and wgs84 coordinate system conversion, interface, enter the latitude and longitude coordinates 84 value, press Enter to get the coo