Create list of variables to be printed?

[Kevin Horton]

I'm a perl newbie working on a script to log data from a device that  
sends more variables than I need to log.  I have a working prototype  
script, with the list of variables to be logged hard-coded, which means  
I need to edit the script any time I need to change the items to be  
printed.

Now I want to extend the script to use a configuration file to define  
the list of variables to be logged, and the order to write them to the  
log file.  I've been messing around with this for many hours, and I've  
dug through the various perl man pages, plus Perl in a Nutshell, and  
Programming Perl, but I'm not making any progress.

My working prototype script with the hard-coded list of variables  
prints output with the following line:

print OUTPUT  
"$data_time\t$TACH\t$MP\t$FUEL_FLOW\t$QTY\t$CHT1\t$CHT2\t$CHT3\t$CHT4\t$ 
EGT1\t$EGT2\t$EGT3\t$EGT4\t$OILT\t$OILP\t$VOLT\t$OAT\t$UNIT_TEMP\n";

I've got a config file that I read to create an array of variable names  
that should be logged.  The first few items in @variable_list are:

data_time
TACH
MP
FUEL_FLOW
I would greatly appreciate any hints on how I can use the data in  
@variable_list to print just the variables I want.

Thanks in advance,
Kevin Horton
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