The C for() loop - A strange observation Post: 302363275

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Top Forums Programming The C for() loop - A strange observation Post 302363275 by fpmurphy on Monday 19th of October 2009 11:56:47 PM

10-20-2009

Registered User

Not very strange. Your second example relates to a controlling expression which is always evaluated before each execution of the for loop. See ISO C99 6.8.5.3.

The statement for ( clause-1 ; expression-2 ; expression-3 ) statement
behaves as follows: The expression expression-2 is the controlling expression that is
evaluated before each execution of the loop body. The expression expression-3 is
evaluated as a void expression after each execution of the loop body. If clause-1 is a
declaration, the scope of any variables it declares is the remainder of the declaration and
the entire loop, including the other two expressions; it is reached in the order of execution
before the ﬁrst evaluation of the controlling expression. If clause-1 is an expression, it is
evaluated as a void expression before the ﬁrst evaluation of the controlling expression.
Both clause-1 and expression-3 can be omitted. An omitted expression-2 is replaced by a
nonzero constant.

fpmurphy

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LEARN ABOUT DEBIAN

smd-loop

smd-loop(1)						 Sync Mail Dir (smd) documentation					       smd-loop(1)

NAME

       smd-loop - iterates smd-pull and smd-push

SYNOPSIS

       smd-loop [-vt]

DESCRIPTION

       smd-loop  runs  smd-push and smd-pull at regular intervals as defined by the user in the ~/.smd/loop configuration file. On errors that are
       reported to be transient, it retries a second time before failing.

       The configuration file is line-oriented. Each line is composed of three space separated fields:	pull-frequency,  push-frequency  and  end-
       point-name. Frequencies are expressed in minutes, while endpoint name is a valid name for smd-pull(1) and smd-push(1). Lines beginning with
       # are considered as comments. The following example calls the command smd-pull default every 3 minutes,	and  smd-push  default	every  10.
       Example:

	   # pull-frequency push-frequency endpoint-name
	     3		    10		   default

OPTIONS

       -v     Increase program verbosity (printed on stderr)

       -t     Just create a template configuration file if none

FILES

       ~/.smd/loop

SEE ALSO

       mddiff(1), smd-server(1), smd-client(1), smd-push(1), smd-pull(1)

AUTHOR

       Enrico Tassi <gares@fettunta.org>

								   11 June 2012 						       smd-loop(1)