If I understand, your solution, as it is, would still be wrong to be passed to the Fortran code as in Fortran the column index is faster changing. And if you wo

If I understand, your solution, as it is, would still be wrong to be passed to the Fortran code as in Fortran the column index is faster changing. And if you would blindly translate some FORTRAN code to C with the above arrays, even if you'd get the same results the C one would be slower because of that, as the FORTRAN code could have been written with the knowledge of which index arrangement is faster.