FyD wrote:
Dear All,
I have two perl scripts:
- The first one:
sub Tt {
$TTT = uc($TTT);
if(($TTT ne "ON") && ($TTT ne "OFF")){ print "ERROR: Check variable TTT";}
else { print "It is a Test...";}
}
# ---MAIN---
$TTT = "OFF";
Tt();
If I use $TTT = "OFF", I get 'It is a Test...' and if I use $TTT="O" I get
'ERROR: Check variable TTT'. This, it is normal for me.
- The second script using 'strict' this time:
use strict;
sub Tt {
my $TTT; $TTT = uc($TTT);
if(($TTT ne "ON") && ($TTT ne "OFF")){ print "ERROR: Check variable TTT";}
else { print "It is a Test...";}
}
# ---MAIN---
my $TTT = "OFF";
Tt();
If I use $TTT = "OFF" I get time 'ERROR: Check variable TTT', Why ?
Thanks, Francois
Because $TTT is undef.
When you declare $TTT i Tt perl creates a new variable and hides away the $TTT
from the "main" part of your script to be restored when Tt returns.
Change 'my $TTT;' in Tt to my '$TTT = shift;' and call Tt like this 'Tt($TTT)'.
You should *always* use, use strict;.
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a.k.a Greven, TuxPower The glamour, the fortune, the pain,
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