To elaborate on what borisz said -

Your second example does display the appropriate run-time error messages: 

Global symbol "%hash" requires explicit package name at test-hashref.p
+l line 6.
Global symbol "%hash" requires explicit package name at test-hashref.p
+l line 6.
Global symbol "%hash" requires explicit package name at test-hashref.p
+l line 6.

[download]
This is easily corrected by changing line 6 to: 
print "$hash->{A} $hash->{B} $hash->{C}\n";

[download]
which prints 
1 2 3

[download]
as expected.

     "For every complex problem, there is a simple answer ... and it is wrong." --H.L. Mencken

In reply to Re: Reference curiosity? by NetWallah
in thread Reference curiosity? by tamaguchi

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