diff --git a/diy.py b/diy.py
index 9ec7ce4..7d34436 100644
--- a/diy.py
+++ b/diy.py
@@ -3,10 +3,10 @@
 cost= {'苹果':5.2,'山竹':12.9,'香蕉':2.4,'荔枝':15,'葡萄':9.3,'桂圆':8,'蓝莓':10,'李子':8}
 k=input('请输入水果名称：')
 v=input('请输入水果价钱：')
-# ?补充条件判断:
-    if k in cost:
-        if float(v)<cost[k]更新价钱
-        print(k+'降价了，现价'+v+'元')
+if k in cost:
+    if float(v)<cost[k]:#更新价钱
+            cost[k] = float(v)
+        print(k+'降价了，现价'v+'元')
     else:
         print(k+'涨价了，我们不买')
 else: