Numeric polymorphism, plus real kind type parameterization,
decimal precision selection, and numeric environmental
inquiry, justify ranking Fortran 90 first among the four
languages. The reason for ranking Fortran 77 second is its
support for complex variables, important in many
computational science applications. C++ nudges out C for
third place due to its capabilities in the general area of
polymorphism.

### List of retrievable codes:

smooth77.f , and
test_smooth77.f ,
Fortran 77 version of
subroutine SMOOTH to compute a
3x3 average for each element of an input matrix, except for the edges of
the matrix. (This is a simple version of a common
technique for refining/enhancing a picture
represented by a matrix.) And a Fortran 77 code to test smooth77.f.

smooth90.f,
Fortran 90 version of subroutine SMOOTH.

test_smooth.c , C version
of subroutine SMOOTH and test program. (C++ version
would be similar, though classes would be used.
if polymorphism were important as described in section 3.3).