reading commandline parameters and <>

[Ramprasad A Padmanabhan]

I am running a perl program that reads a file name from commandline 
substitutes one string with another
displays the output

#!/usr/bin/perl

open(IN,$ARGV[0]) || die $!;
while(<IN>){
  s/$ARGV[1]/$ARGV[2]/;
  print;
}
exit 0;
__END__

# I run this using command
# perl myscript.pl THEFILE  OLDSTR NEWSTR 


Can  I use <> instead on open file and then <IN> here

Thanks
Ramprasad








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