Nodes of different colours represent the following:
Solid arrows point from a submodule to the (sub)module which it is
descended from. Dashed arrows point from a module or program unit to
modules which it uses.
program volatile_doctestuse vecfor_RPPtype(vector)::pt(0:1)pt(1)=1*ex+2*ey+1*ezpt(0)=-pt(1)print"(3(F4.1,1X))",pt(0)%x,pt(0)%y,pt(0)%zendprogram volatile_doctest