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Be able to control score feedback using problemstatus parameter

<problem>

<parameter name="scoreformat" description="Format for display of score" type="string" />
<parameter name="uploadedfiletypes" id="11" default="doc,docx,xls,xlsx,ppt,pptx,png,jpg,jpeg,gif,txt,pdf,htm,html" type="string_fileext" description="Allowed File Extensions for Uploaded Files" />
<parameter name="maxfilesize" id="13" default="10.0" type="float_pos" description="Max. cumulative size (MB) for submitted file(s)" /> 

<script type="loncapa/perl">
$weight=&EXT('resource.0.weight');
if ((!defined($weight)) || ($weight eq '')) { $weight=1; }
$awarded=&EXT('user.resource.resource.0.awarded');
$scoreformat=&EXT('resource.0.scoreformat');
if (!defined($scoreformat) || $scoreformat eq '') { $scoreformat="0f"; }
$display='';
if (&EXT('resource.0.problemstatus')!~/^no/) {
   if (!defined($awarded)) {
      $display=$weight.' possible points.';
   } else {
      $display='You have '.&format($awarded*$weight,$scoreformat).' out of '.
            $weight.' possible points.';
   }
}
$comment=&EXT('user.resource.resource.0.comment');
if (!defined($comment) || $comment!~/\w/) {
   $comment='';
} else {
   $comment='<br /><table><tr><td bgcolor="#FFFFDD">'.$comment.'</td></tr></table>';
}
$gradeinfo=&EXT('user.resource.resource.0.gradeinfo');
if (!defined($gradeinfo) || $gradeinfo!~/\w/) {
   $gradeinfo='';
} else {
   $gradeinfo='<br /><table><tr><td bgcolor="#DDDDFF"><font size="+2">'.$gradeinfo.'</font></td></tr></table>';
}

</script>

<startouttext />
<displaytitle />
$display
<instructorcomment><span style="color:red"><br />
You should adjust this resource in "Modify parameter settings for this resource:"
<ul><li>If non-integer points are used (e.g., 3.5), make sure to change the display format, or the result will be displayed in rounded form.</li>
<li>To change the allowed file types for submissions, change the "uploadedfiletypes"</li>
<li>To change the maximum cumulative size for submitted files for this item, modify the "maxfilesize" parameter (The default is 10 MB).</li>
<li>Feedback on grades can be controlled using the "problemstatus" parameter.</li>
</ul>
You can upload comments and grade information with this resource when uploading CSV files.
</span></instructorcomment>
$gradeinfo
$comment
<endouttext />

<essayresponse id="upload">
</essayresponse>

</problem>