练习:
1. 要求用户输入总资产,例如:2000
2. 显示商品列表,让用户根据序号选择商品,加入购物车
3. 购买,如果商品总额大于总资产,提示账户余额不足,否则,购买成功。
goods = [{'name':'电脑', 'price':1999},{'name':'鼠标', 'price':10},{'name':'游艇', 'price':20},{'name':'玩具', 'price':998},]
p1 = int(input('enter your money:'))
while True:
if not isinstance(p1, int):
raise TypeError('bad type.')
for i in goods:
print(goods.index(i), i)
p2 = int(input('enter your price:'))
if p2 == 0:
p1 = p1 - int(goods[p2]['price'])
if p1 < 0:
print('余额不足。')
break
else:
print('***********************')
print('当前余额:', p1)
print('***********************')
elif p2 == 1:
p1 = p1 - int(goods[p2]['price'])
# print(p3)
if p1 < 0:
print('余额不足。')
break
else:
print('***********************')
print('当前余额:', p1)
print('***********************')
elif p2 == 2:
p1 = p1 - int(goods[p2]['price'])
# print(p3)
if p1 < 0:
print('余额不足。')
break
else:
print('***********************')
print('当前余额:', p1)
print('***********************')
elif p2 == 3:
p1= p1 - int(goods[p2]['price'])
# print(p3)
if p1 < 0:
print('余额不足。')
break
else:
print('***********************')
print('当前余额:', p1)
print('***********************')
else:
print('***********************')
print('商品序号错误,请重新输入。')
print('***********************')