bug修改

@@ -752,7 +752,7 @@ class User extends Api
 
         unset($data['exam']['updatetime']);
         unset($data['exam']['createtime']);
-        $a = floor($data['exam']['finish_hour']/$data['exam']['class_hour']*100);
+        $a = $data['exam']['class_hour'] == 0 ? 0 : floor($data['exam']['finish_hour']/$data['exam']['class_hour']*100);
         if($a > 100){
             $a = 100;
         }