save project

func.py

@@ -13,5 +13,12 @@ def a_in():
                 total.append(unit)
             finally:
                 print("-"*30)
+    return total
+def sum(unit):
+    c=0
+    for i in unit:
+        c=c+i
+    return c
 r=a_in()
-print(f)
\ No newline at end of file
+pay=sum(r)
+print("一共消费了"+str(pay)+"元！")
\ No newline at end of file