Qilinbranch

src/main/java/app/Config.java

@@ -65,5 +65,11 @@ public GetAverageGradeUseCase getAverageGradeUseCase() {
         return new GetAverageGradeUseCase(gradeDataBase);
     }
 
-    // TODO Task 4: add code for the new GetTopGradeUseCase following the same pattern as the other use cases above.
+    /**
+     * Get the GetTopGradeUseCase object.
+     * @return GetTopGradeUseCase object.
+     */
+    public GetTopGradeUseCase getTopGradeUseCase() {
+        return new GetTopGradeUseCase(gradeDataBase);
+    }
 }

src/main/java/usecase/GetAverageGradeUseCase.java

@@ -29,6 +29,12 @@ public float getAverageGrade(String course) {
         // TODO Task 3a: Complete the logic of calculating the average course grade for
         //              your team members. Hint: the getGrades method might be useful.
 
+        for (String member: team.getMembers()) {
+            Grade memberGrade = gradeDataBase.getGrade(member, course);
+            sum += memberGrade.getGrade();
+            count++;
+        }
+
         if (count == 0) {
             return 0;
         }