fig18_04.pl

PERL语言资料 可以用于PERL程序设计

#!/usr/bin/perl
# Fig. 18.4: fig18_04.pl
# Uses the system function to clear the screen.

use warnings;
use strict;

print( "What file would you like to create? " );
chomp( my $file = <STDIN> );

( $^O =~ /Win/ ) ? system( "cls" ) : system( "clear" );

print( "Type the text you wish to be in this file.\n" );
print( "Type clear on a blank line to start over.\n" );
print( "Type quit on a blank line when you are finished.\n" );
open( FILE, ">$file" ) or die( "Cannot open: $!" );

while ( <STDIN> ) {
   last if ( /quit/ );

   if ( /clear/ ) {
      ( $^O =~ /Win/ ) ? system( "cls" ) : system( "clear" );
      print( "Type the text you wish to be in this file.\n" );
      print( "Type clear on a blank line to start over.\n" );
      print( "Type quit on a blank line " );
      print( "when you are finished.\n" );
      open( FILE, ">$file" ) or die( "Cannot open: $!" );
   }
   else {
      print( FILE );
   }
}

close( FILE ) or die( "Cannot close: $!" );

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