fig13_06.pl

来自「PERL语言资料 可以用于PERL程序设计」· PL 代码 · 共 44 行

#!/usr/bin/perl
# Figure 13.6: fig13_06.pl
# Anonymous functions

use warnings;
use strict;

my $productRef = sub
{
   my $product = 1;

   foreach ( @_ ) {
      $product *= $_;
   }

   return $product;
};

my $printVal = &$productRef( 1, 2, 3, 4 );
print( join( ' * ', 1, 2, 3, 4  ), " = " );
print( "$printVal\n" );

$printVal = $productRef->( 6, 8, -5, 2 );
print( join( ' * ', 6, 8, -5, 2 ), " = " );
print( "$printVal\n" );

$printVal = $productRef->( 4, 3, 2, 1 );
print( join(' * ', 4, 3, 2, 1 ), " = " );
print( "$printVal\n" );

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