Nodes of different colours represent the following:
Solid arrows point from a file to a file which it depends on. A file is dependent upon another if the latter must be compiled before the former can be.
program volatile_doctest use vecfor_R4P type(vector_R4P) :: pt pt = ex_R4P + ey_R4P print "(F4.2)", normL2_R4P(pt) endprogram volatile_doctest