how to write data passed as an argument to a function ???

[vijayarl]

Hi All,

am trying to call the function, which needs to write the arguements passed to this function in a file.
basically creating a log file : thought instead of printing message, i will write the data in seperate log file so that it will useful for later anlaysis.

script goes like this:

my $string;
my $str="";
my $datestamp = sprintf "%02d%02d%02d", 
    ((localtime)[5]%100, (localtime)[4]+1, (localtime)[3]);
#print $datestamp;
my $time =localtime();
my $subtime = substr($time,11,18);
my $time_sub = substr($subtime,0,8);
#my $datetime=$datestamp."_".$time_sub;
my $logfile ="c:\\Performance_svap\\logfile_$datestamp.txt";
open (Wlog,"> $logfile") or die "Can't open $logfile : $!";
&writelogfile("hi All");
&wirtelogfile("Testing Log file creation");
sub writelogfile($str){
	open(Wlog,">> $logfile") or die "Can't open $logfile : $!";
	#write $str;
	close Wlog;
}
close Wlog;

when i try to run this script i get this error message :

C:\Performance_svap\misc>chkempty.pl
Undefined subroutine &main::wirtelogfile called at :\Performance_svap\misc\chke
mpty.pl line 197.

but when i comment one of the calling function then, logfile gets created but there is not content in it.
All i need is while call this function

&writelogfile("hi All");

in the output logfile i should get the string which is passed to this function.
somethig like this :

in logfile: "hi All" should be written

can anyone tell me how to acheive this ???

Regards,
Vijayarl

[Stwange]

If you refuse to read the warning messages or the code, you will never be able to fix your "own" work.

Firstly:

&wirtelogfile("Testing Log file creation");

You see how this is spelt wrong? It should be &writelogfil e, as the warning tells you.

Secondly:

sub writelogfile($str){
    open(Wlog,">> $logfile") or die "Can't open $logfile : $!";
    #write $str;
    close Wlog;
}

This function opens the logfile and closes it again. Nothing else is done with this file as the middle line is commented out. What do you expect a commented out line to do, apart from nothing?

As for the $str, this isn't how you get parameters in perl, you have to get them from @_. This function does what you want (assuming it's not called from another object):

sub writelogfile { # assumes $logfile is already defined
     my $str = shift; # get the first parameter from @_
     open(WLOG,">> $logfile") or die "Can't open $logfile : $!";
     print WLOG "$str\n"; # using print here which doesn't print a newline by default/
     close WLOG;
}

[vijayarl]

Thanks Stwange !!!!!

thanks for pointout my mistakes in script...hereaf ter i will try debug errors myself....

Thanks once again for your support....scri pt worked fine as expected...

Regards,
Vijayarl