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Diff for /loncom/homework/default_homework.lcpm between versions 1.92 and 1.98

version 1.92, 2005/02/17 21:42:37 version 1.98, 2005/03/31 17:12:37
Line 163  sub caparesponse_check { Line 163  sub caparesponse_check {
     elsif ($result == '9') { $result='ANS_CNT_NOT_MATCH'; }      elsif ($result == '9') { $result='ANS_CNT_NOT_MATCH'; }
     elsif ($result =='10') { $result='SUB_RECORDED'; }      elsif ($result =='10') { $result='SUB_RECORDED'; }
     elsif ($result =='11') { $result='BAD_FORMULA'; }      elsif ($result =='11') { $result='BAD_FORMULA'; }
       elsif ($result =='12' && !$response) { $result='MISSING_ANSWER'; }
       elsif ($result =='12') { $result='WANTED_NUMERIC'; }
     elsif ($result =='13') { $result='UNIT_INVALID_INSTRUCTOR'; }      elsif ($result =='13') { $result='UNIT_INVALID_INSTRUCTOR'; }
     elsif ($result =='141') { $result='UNIT_INVALID_STUDENT'; }      elsif ($result =='141') { $result='UNIT_INVALID_STUDENT'; }
     elsif ($result =='142') { $result='UNIT_INVALID_STUDENT'; }      elsif ($result =='142') { $result='UNIT_INVALID_STUDENT'; }
Line 516  sub format { Line 518  sub format {
     #if ($options =~ /\$/) { $dollamode=1; }      #if ($options =~ /\$/) { $dollamode=1; }
     #if ($options =~ /,/)  { $commamode=1; }      #if ($options =~ /,/)  { $commamode=1; }
     if ($options =~ /\./) { $alwaysperiod=1; }      if ($options =~ /\./) { $alwaysperiod=1; }
     $fmt=~s/e/E/g;      if ($fmt=~/s$/i) {
     my $result=sprintf('%.'.$fmt,$value);   $result=&format_significant_figures($value,$fmt);
     if ($alwaysperiod && $fmt eq '0f') { $result .='.'; }      } else {
     $result=~s/(E[+-]*)0/$1/;   $fmt=~s/e/E/g;
    my $result=sprintf('%.'.$fmt,$value);
    if ($alwaysperiod && $fmt eq '0f') { $result .='.'; }
    $result=~s/(E[+-]*)0/$1/;
       }
     #if ($dollarmode) {$result=&dollarformat($result);}      #if ($dollarmode) {$result=&dollarformat($result);}
     #if ($commamode) {$result=&commaformat($result);}      #if ($commamode) {$result=&commaformat($result);}
     return $result;      return $result;
Line 527  sub format { Line 533  sub format {
   
 sub chemparse {  sub chemparse {
     my ($reaction) = @_;      my ($reaction) = @_;
     my @tokens = split(/(\s\+|\->|<=>)/,$reaction);      my @tokens = split(/(\s\+|\->|<=>|<\-|\.)/,$reaction);
     my $formula = '';      my $formula = '';
     foreach my $token (@tokens) {      foreach my $token (@tokens) {
  if ($token eq '->' ) {   if ($token eq '->' ) {
     $formula .= '<m>\ensuremath{\rightarrow}</m> ';      $formula .= '<m>\ensuremath{\rightarrow}</m> ';
     next;      next;
  }   }
    if ($token eq '<-' ) {
       $formula .= '<m>\ensuremath{\leftarrow}</m> ';
       next;
    }  
  if ($token eq '<=>') {   if ($token eq '<=>') {
     if ($external::target eq 'web' &&      if ($external::target eq 'web' &&
  &EXT('request.browser.unicode')) {   &EXT('request.browser.unicode')) {
  $formula .= '&#8652; ';   $formula .= '&#8652; ';
     } else {      } else {
  $formula .= &web('<=> ','<m>\ensuremath{\rightleftharpoons}</m> ',   $formula .= &web('<=> ','<m>\ensuremath{\rightleftharpoons}</m> ',
  '&lt;=$gt; ');   '&lt;=&gt; ');
     }      }
     next;      next;
  }   }
  $token =~ /^\s*(\d*(?:&frac\d\d)?)(.*)/;   if ($token eq '.') {
     $formula =~ s/(\&nbsp\;| )$//;
     $formula .= '&middot;';
     next;
    }
    $token =~ /^\s*([\d|\/]*(?:&frac\d\d)?)(.*)/;
         $formula .= $1 if ($1 ne '1');  # stoichiometric coefficient          $formula .= $1 if ($1 ne '1');  # stoichiometric coefficient
   
  my $molecule = $2;   my $molecule = $2;
Line 556  sub chemparse { Line 571  sub chemparse {
  $molecule =~ s/\s*//g;   $molecule =~ s/\s*//g;
  # forced space   # forced space
  $molecule =~ s/_/ /g;   $molecule =~ s/_/ /g;
    $molecule =~ s/-/&minus;/g;
  $formula .= $molecule.'&nbsp;';   $formula .= $molecule.'&nbsp;';
     }      }
     # get rid of trailing space      # get rid of trailing space
     $formula =~ s/(\&nbsp\;| )$//;      $formula =~ s/(\&nbsp\;| )$//;
     if ($external::target eq 'web') { return $formula; }  
     return &xmlparse($formula);      return &xmlparse($formula);
 }  }
   
Line 574  sub prettyprint { Line 589  sub prettyprint {
     if ($options =~ /\$/) { $dollarmode=1; }      if ($options =~ /\$/) { $dollarmode=1; }
     if ($options =~ /,/)  { $commamode=1; }      if ($options =~ /,/)  { $commamode=1; }
     if ($options =~ /\./) { $alwaysperiod=1; }      if ($options =~ /\./) { $alwaysperiod=1; }
     if ($fmt) { $value=sprintf('%.'.$fmt,$value); }      if ($fmt=~/s$/i) {
    $value=&format_significant_figures($value,$fmt);
       } elsif ($fmt) {
    $value=sprintf('%.'.$fmt,$value);
       }
     if ($alwaysperiod && $fmt eq '0f') {      if ($alwaysperiod && $fmt eq '0f') {
  if ($target eq 'tex') {   if ($target eq 'tex') {
     $value .='\\ensuremath{.}';      $value .='\\ensuremath{.}';
Line 636  sub dollarformat { Line 655  sub dollarformat {
     return $number;       return $number; 
 }  }
   
   # format of form ns or nS where n is an integer
   sub format_significant_figures {
       my ($number,$format) = @_; 
       return '0' if ($number == 0);
       # extract number of significant figures needed
       my ($sig) = ($format =~ /(\d+)s/i);
       # arbitrary choice - suggestions ?? or throw error message?
       $sig = 3 if ($sig eq '');
       # save the minus sign
       my $sign = ($number < 0) ? '-' : '';
       $number = abs($number);
       # needed to correct for a number greater than 1 (or
       my $power = ($number < 1) ? 0 : 1;
       # could round up. Take the integer part of log10.
       my $x10 = int(log($number)/log(10));
       # find number with values left of decimal pt = # of sign figs.
       my $xsig = $number*10**($sig-$x10-$power);
       # get just digits left of decimal pt - also rounds off correctly
       my $xint  = sprintf('%.0f',$xsig);
       # save any trailing zero's
       my ($zeros) = ($xint =~ /(0+)$/);
       # return number to original magnitude
       my $numSig = $xint*10**($x10-$sig+$power);
       # insert trailing zero's if have decimal point
       $numSig =~ s/^(\d+)\.(\d+)(\e?(.*)?)$/$1\.$2$zeros$3/;
       # put a decimal pt for number ending with 0 and length = # of sig fig
       $numSig.='.' if (length($numSig) == $sig && $numSig =~ /0$/);
       if (length($numSig) < $sig) {
    $numSig.='.'.substr($zeros,0,($sig-length($numSig)));
       }
       # return number with sign
       return $sign.$numSig;
   
   }
   
 sub map {  sub map {
     my ($phrase,$dest,$source)=@_;      my ($phrase,$dest,$source)=@_;
     my @oldseed=&random_get_seed();      my @oldseed=&random_get_seed();
Removed from v.1.92  
changed lines
  Added in v.1.98

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