To expand a bit on other answers: There is a qualitative difference Fortran has by offering

1) built-in multidimensional arrays including Matlab-like array operations. That means every library supports the same format, it's standardized and convenient as opposed to the many formats in C++ Land.

2) performant defaults. When performance is more important than safety, Fortran programs are easier to write and maintain. Arguments are by default pass-by-reference, non-aliased (a major assumption Fortran compilers can usually make to optimize) and their intent as in/out/in out can simply be marked as such.

Fortran:

real(8), intent(in) :: foo

C:

restrict const * const double foo # if I remember correctly