Fs
by_err2[i]->err2, Fs, by_err2[i]->arg, by_err2[i]->res );
by_err1[i]->err1, Fs, by_err1[i]->arg, by_err1[i]->res );
fprintf( out, "%8s %5d %27.5f %26.18g %25.18g\n", Fs, N,
printf( "result of %s is ", Fs );