allocate() initialization
in [Fortran]
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From: Colin Watters on 21 Apr 2010 17:11 "robin" <robin51(a)dodo.com.au> wrote in message news:4bcf29d0$0$894$c30e37c6(a)exi-reader.telstra.net... > "Colin Watters" <boss(a)qomputing.com> wrote in message > news:hqm6l4$2kd$1(a)news.eternal-september.org... > | > | "robin" <robin51(a)dodo.com.au> wrote in message > | news:4bce6070$0$895$c30e37c6(a)exi-reader.telstra.net... > | > "Colin Watters" <boss(a)qomputing.com> wrote in message > | > news:hqkvmd$t8d$1(a)news.eternal-september.org... > | > | > | > | "robin" <robin51(a)dodo.com.au> wrote in message > | > | news:4bcdd1a5$0$893$c30e37c6(a)exi-reader.telstra.net... > | > | > "Gib Bogle" <g.bogle(a)auckland.no.spam.ac.nz> wrote in message > | > | > news:hqjgq0$iad$1(a)speranza.aioe.org... > | > | > | Should one rely on allocated arrays being initialized to zero? > | > | > > | > | > Nothing is ever initialized to zero automatically. > | > > | > | Rubbish. > | > | > | > | See for example the compiler option "-zero" on Intel Fortran. > | > > | > Is that standard Fortran? > | > | Where does it say "standard Fortran" in "Nothing is ever initialized to > | zero automatically"? > > Where does it say that everything is initialized to zero? > > It doesn't. It shows an example of "something" being initialized to zero, automatically. Now answer MY question. -- Qolin Email: my qname at domain dot com Domain: qomputing
From: Uno on 26 Apr 2010 01:14
Tobias Burnus wrote: > On 04/22/2010 08:46 AM, Uno wrote: >> How would I set the real components of the living object to zero at the >> gitgo? > > Use a default initializer: > >> type room >> real :: hor > > append a " = 0.0". Then, you have: > > type room > real :: hor = 0.0, vert = 0.0, subtract = 0.0 > character(len=10) :: name > end type room > > (And of cause, any other constant expression is allowed, e.g., > "name='default'" or "hor=cos(42.0)") > >> type(room) :: living ! Define the basic tree type type node character(max_char) :: name ! name of node real, pointer :: y(:) ! stored real data type(node), pointer :: parent ! parent node type(node), pointer :: sibling ! next sibling node type(node), pointer :: child ! first child node end type node How do I extend this node to incorporate the above and thereafter give them default values? Until I understand the type definition better, I was thinking having a unique integer in the node might be a good thing; otherwise isn't it ! Define the basic tree type type node character(20) :: name ! name of node real, pointer :: hor(:) ! stored real data real, pointer :: vert(:) ! stored real data real, pointer :: subtract(:) ! stored real data type(node), pointer :: parent ! parent node type(node), pointer :: sibling ! next sibling node type(node), pointer :: child ! first child node end type node ? -- Uno |