print("欢迎光临购物系统")
sum = 0
while True:
print("请选择您要购买的商品")
print("1.T恤 2.篮球 3.羽绒服")
number = input("请输入您要购买的商品编号")
if number == "1":
print("您购买了T恤，250元")
sum = sum+250
elif number == "2":
print("您购买了篮球,300元")
sum = sum + 300
elif number == "3":
print("您购买了羽绒服，350元")
sum = sum+350
else:
print("错误")
char = input("输入n终止购物，输入其他继续")
if char == "n":
break
print("您本次消费总价为"+str(sum))
