save project

1.py

+cost={'苹果':5,'香蕉':3,'山竹':10}
+k=input("请输入你想要的水果")
+v=input("请输入水果价格")
+if k in cost:
+    if int(v)<cost[k]:
+        cost[k]=int(v)
+        print("降价喽！")
+    else:
+        print("涨价了")
+else:
+    cost[k]=int(v)
+    print("有新商品了")
+        
\ No newline at end of file