--- loncom/homework/default_homework.lcpm	2002/11/13 23:05:46	1.54
+++ loncom/homework/default_homework.lcpm	2003/02/12 22:45:01	1.57
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
 #
-# $Id: default_homework.lcpm,v 1.54 2002/11/13 23:05:46 albertel Exp $
+# $Id: default_homework.lcpm,v 1.57 2003/02/12 22:45:01 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -152,6 +152,8 @@ sub get_array_args {
 sub caparesponse_check_list {
   my ($response,$expr)=@_;
   my $result;
+  $expr =~ s/\\/\\\\/g;
+  $expr =~ s/\'/\\\'/g;
   my ($result,@list) = &get_array_args($expr,'answer');
   my $aresult='';
   my $current_answer;
@@ -180,12 +182,15 @@ sub caparesponse_check_list {
   my $awards='';
   for ($i=0; $i<@list;$i++) {
     $result.="trying answer :$list[$i]:\n";
+    my $thisanswer=$list[$i];
+    $thisanswer=~ s/\\/\\\\/g;
+    $thisanswer =~ s/\'/\\\'/g;
     if ($unit eq '') {
       $aresult=&caparesponse_check($responselist[$i],
-			     $expr.';my $answer=\''.$list[$i].'\';');
+			     $expr.';my $answer=\''.$thisanswer.'\';');
     } else {
       $aresult=&caparesponse_check($responselist[$i]." $unit",
-				   $expr.';my $answer=\''.$list[$i].'\';');
+				   $expr.';my $answer=\''.$thisanswer.'\';');
     }
     my ($temp)=split /:/, $aresult;
     $awards.="$temp,";
@@ -240,7 +245,8 @@ sub hinton {
 sub random {
   my ($start,$end,$step)=@_;
   if ( ! $hidden::RANDOMINIT ) {
-    &random_set_seed(1,$external::randomseed);
+    if ($external::randomseed == 0) { $external::randomseed=1; }
+    &random_set_seed(1,int(abs($external::randomseed)));
     &math_random_uniform();
     $hidden::RANDOMINIT=1;
   }
@@ -566,7 +572,7 @@ sub map {
 	    }
 	}
     }
-    &random_set_seed(@seed);
+    &random_set_seed(@oldseed);
     return '';
 }