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Annotation of loncom/homework/templates/sampleexternal.problem, revision 1.3

1.1       www         1: <problem>
                      2: <script type="loncapa/perl">
                      3: sub fact {
                      4:    my $n=shift;
                      5:    if ($n==1) {
                      6:       return $n;
                      7:    } else {
                      8:       return $n*&fact($n-1);
                      9:    }
                     10: }
                     11: 
                     12: $testvalues='0=1';
1.2       www        13: foreach $i (1..3) {
1.1       www        14:    $rand=&random(3,8,1);
                     15:    $testvalues.=','.$rand.'='.&fact($rand);
                     16: }
                     17: </script>
                     18: 
                     19: 
                     20: <startouttext />Write a Perl subroutine called <tt>factorial</tt>, which returns the factorial of its argument, e.g. <tt>&amp;factorial(17)=17!</tt>.
                     21: <instructorcomment>
                     22: Sample code for an evaluation script can be found <a href="/res/adm/includes/templates/sampleexternal.pl">here.</a></instructorcomment>
                     23: <endouttext />
1.3     ! www        24: <externalresponse url="http://localhost/cgi-bin/sampleexternal.pl" answer="$testvalues" answerdisplay="The most elegant (and dangerous) solution is recursive.">
1.1       www        25: <textfield />
                     26: 
                     27: </externalresponse>
                     28: </problem>