修改人数显示

app/helpers/courses_helper.rb

@@ -114,7 +114,15 @@ module CoursesHelper
   # 学生人数计算
   # add by nwb
   def studentCount course
-    course.student.count
+    count = course.student.count
+    if count <= 5
+      result = count.to_s
+    elsif count < 10  && count > 5
+       result = "5+"
+    else
+      result = (count-count % 10).to_s + "+"
+    end
+    result
   end
 
   def eventToLanguageCourse event_type, course