/in/fileReverse.c: In function 'main':
/in/fileReverse.c:15:28: error: format '%s' expects argument of type 'char *', but argument 3 has type 'int' [-Werror=format=]
             fprintf(fout,"%s",line[l-i]);
                           ~^  ~~~~~~~~~
                           %d
cc1: all warnings being treated as errors