diff --git a/ex11/graph.hpp b/ex11/graph.hpp
index aeb5fbb..089e281 100644
--- a/ex11/graph.hpp
+++ b/ex11/graph.hpp
@@ -53,7 +53,7 @@ class graphVertex
 {
 private:
     Vector<Vertex<Tv> *> V;
-    Vector<Edge<Te> *> E;
+    Vector<Vector<Edge<Te> *>> E;
     int v;
     int e;
 
@@ -121,14 +121,14 @@ public:
     //         0 成功
     virtual int link(int id1, int id2, int w)
     {
-        // if (V[id1] == NULL || V[id2] == NULL)
-        //     return -1;
-        // if (E[id1][id2] != NULL)
-        //     return -2;
+        if (V[id1] == NULL || V[id2] == NULL)
+            return -1;
+        if (E[id1][id2] != NULL)
+            return -2;
         V[id1]->outDegree++;
         V[id2]->inDegree++;
         Edge<Te> *temp = new Edge<Te>(w);
-        (E->_v[id1])->_v[id2] = temp;
+        (E._v[id1])._v[id2] = temp;
         return 0;
     }
     // 解除 id1->id2 连接