save project

diy1.py

@@ -16,3 +16,18 @@
 #print(dict_hero)
 #dict_hero['猴五'] = 45
 #print(dict_hero)
+
+
+cost = {'苹果':8.5,'梨子':12.9,'香蕉':2.4}
+k = input('请输入水果名称：')
+v = input('请输入水果价钱：')
+if k in cost:
+    if float(v)<cost[k]:
+        cost[k] = float(v)
+        print(k+'降价了，现价'+v+'元')
+    else:
+        print(k+'涨价了，我们不买')
+else:
+    cost[k] = float(v)
+    print(k+'的价钱'+v+'元已上传~')
+    
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