根据经纬度计算子午线收敛角，便于进行收敛角改正-calculated according to latitude and longitude meridian convergence angle, facilitate the convergence angle correction

根据经纬度计算子午线收敛角，便于进行收敛角改正-calculated according to latitude and longitude meridian convergence angle, facilitate the convergence angle correction

用C语言写的图形程序，演示的是在图形界面下实现物体的运动-Written in C language using a graphics program, presentation of the graphical interface in the movement of objects under