Simplify usage of f2j to "./f2j <source file>"
Simplify usage of f2j to "./f2j <source file>"

zhiyuanshi/fcore,xnning/fcore,bixuanzju/fcore,hkuplg/fcore,xnning/fcore,bixuanzju/fcore,zhiyuanshi/fcore,xnning/fcore,zhiyuanshi/fcore,wxzh/fcore,bixuanzju/fcore,hkuplg/fcore,wxzh/fcore,wxzh/fcore,hkuplg/fcore