Fortran77采用固定格式 前6个字符是标志位
资源：
Fortran77的样例
http://www.mate.tue.nl/~anderson/4K670/tools/f77_examples.html
Fortran77转90 95
mingw的下载链接
https://nchc.dl.sourceforge.net/project/codeblocks/Binaries/20.03/Windows/codeblocks-20.03mingw-setup.exe
https://gcc.gnu.org/wiki/GFortranBinaries#Windows
采用命令行，
来源：oschina
链接：https://my.oschina.net/qiyong/blog/4355732