Thanks for your time. But this is not the solution that I wanted!

My idea is very simple. If the user creates the input parameters as a hash then he can alter the hash at any time and call the function. This is what I mean by the following statements. 
my %input = {foo => 'bar', oof => 'wha'};
my_sub(\%input);

$input{foo} = 'bar1';
my_sub(\%input);

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In reply to Re^4: Hash reference as a parameter by ramya2005
in thread Hash reference as a parameter by ramya2005

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