--- loncom/homework/default_homework.lcpm	2000/09/26 19:29:07	1.1
+++ loncom/homework/default_homework.lcpm	2000/11/22 00:00:54	1.11
@@ -2,12 +2,100 @@
 # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
 # 
 #
+$RANDOMINIT=0;
+
+sub caparesponse_check {
+  my $answer='';  #done
+  my $type='';    #done
+  my $tol_type=''; # gets it's value from whether tol has a % or not done
+  my $tol='';     #done
+  my $sig_lbound='';
+  my $sig_ubound='';
+  my $ans_fmt='';
+  my $units='';
+  my $calc='';
+  my ($response,$expr)=@_;
+  
+  ($answer,$type,$tol,$sig_lbound,$sig_ubound,$ans_fmt,
+   $units,$calc) = eval $expr.'return $answer,$type,$tol,$sig_lbound,$sig_ubound,$ans_fmt,$units,$calc';
+
+  #type's definitons come from capaParser.h
+  if ($type eq '' ) {
+    if ( $answer eq ($answer *1.0)) { $type = 2;
+    } else { $type = 3; }
+  } else {
+         if ($type eq 'cs')    { $type = 4;
+    } elsif ($type eq 'ci')    { $type = 3;
+    } elsif ($type eq 'mc')    { $type = 5;
+    } elsif ($type eq 'fml')   { $type = 8;
+    } elsif ($type eq 'subj')  { $type = 7;
+    } else { return "ERROR: Unknown type of answer: $type" }
+  }
+
+  if ($tol eq '') {
+    $tol=0.0;
+    $tol_type=1; #TOL_ABSOLUTE
+  } else {
+    if ($tol =~ /%$/) {
+      $tol=chop($tol);
+      $tol_type=2; #TOL_PERCENTAGE
+    } else {
+      $tol_type=1; #TOL_ABSOLUTE
+    }
+  }
+  my $result = &caparesponse_capa_check_answer($response,$answer,$type,
+					       $tol_type,$tol,
+					       $sig_lbound,$sig_ubound,
+					       $ans_fmt, $units,$calc);
+
+  if    ($result == '1') { $result='EXACT_ANS'; } 
+  elsif ($result == '2') { $result='APPROX_ANS'; }
+  elsif ($result == '3') { $result='SIG_FAIL'; }
+  elsif ($result == '4') { $result='UNIT_FAIL'; }
+  elsif ($result == '5') { $result='NO_UNIT'; }
+  elsif ($result == '6') { $result='UNIT_OK'; }
+  elsif ($result == '7') { $result='INCORRECT'; }
+  elsif ($result == '8') { $result='UNIT_NOTNEEDED'; }
+  elsif ($result == '9') { $result='ANS_CNT_NOT_MATCH'; }
+  elsif ($result =='10') { $result='SUB_RECORDED'; }
+  elsif ($result =='11') { $result='BAD_FORMULA'; }
+  elsif ($result =='12') { $result='WANTED_NUMERIC'; }
+  else  {$result = "ERROR: Unknown Result: $result";}
+
+  return "$result:$tol:$tol_type";
+}
+
+sub tex {
+  if ( $external::target eq "tex" ) {
+    return @_[0];
+  } else {
+    return @_[1];
+  }
+}
+
+sub web {
+  if ( $external::target eq "tex" ) {
+    return @_[1];
+  } else {
+    if ( $external::target eq "web") {
+      return @_[0];
+    } else {
+      return @_[2];
+    }
+  }
+}
+
+sub problem {
+  return '1';
+}
+
 sub hinton {
   return 0;
 }
 
 sub random {
   my ($start,$end,$step)=@_;
+  if ( ! $RANDOMINIT ) { srand($external::randomseed); $RANDOMINIT=1; }
   my $num=1+int(($end-$start)/$step);
   my $result=$start + int(rand() * $num)*$step;
   return $result;
@@ -18,8 +106,8 @@ sub acos { atan2(sqrt(1 - $_[0] * $_[0])
 sub asin { atan2($_[0], sqrt(1- $_[0] * $_[0]) );  }
 
 sub html {
-  if ( $external::target == "web" ) {
-    $Apache::scripttag::start_script::result.=@_[0];
+  if ( $external::target eq "web" ) {
+    return @_[0];
   }
 }
 
@@ -28,4 +116,36 @@ sub pow   {return $_[0] ** $_[1]; }
 sub ceil  {return (($_[0]-int($_[0]))== 0.0) ? $_[0] : (int($_[0])+ 1); }
 sub floor {return int($_[0]);  }
 
+sub format {
+  my ($value,$fmt)=@_;
+  return sprintf('%.'.$fmt,$value);
+}
+
+sub map {
+  my $num = $#_/2;
+  my $i;
+  my @used;
+  my @permutation;
+  for ($i=0; $i < $num;) {
+    $rand = &random(1,$num,1);
+    if ( $used[$rand] == '0' ) {
+      $i++;
+      $used[$rand]='1';
+      $permutation[$i]=$rand;
+    }
+  }
+  for ( $i=1 ; $i<$num+1 ; $i++ ) {
+    ${$_[$permutation[$i]]}=$_[$i+$num]
+  }
+}
 
+sub choose {
+  my $num = $_[0];
+  return $_[$num];
+}
+#$external::randomseed=time;
+#$a=2;
+#$b=2;
+#$c=2;
+#&map(1,\$a,\$b,\$c,3,4,5);
+#print $a."\n".$b."\n";