save project

func.py

+def func():
+    total = []
+    while True:
+        try:    
+            unit= int(input("请输入："))
+        except:
+            print("輸入錯誤")
+        else:
+            if unit == -1: 
+                print("程序結束")
+                break
+            else:  
+                total.append(unit)
+    return total
+def sum(x):
+    count = 0
+    for i in x:
+        count=count + i
+    return count
+a = func()
+jiage = sum(a)
+print("总共消费："+str(jiage)+"元")
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