购物车程序
我的代码
salary = int(input('input your salary:'))
shopping_car = []
shopping_list = ['iphone','food', 'book','shirt']
shopping_price = [5800,20,60,300]
l = shopping_list
p = shopping_price
def show_list():
for i in shopping_list:
print(l.index(i)+1,'.',i,'--------',p[l.index(i)])
print('如果不想买了，输入两次“q”')
# def shopping():
# show_list()
# y = int(input('chose the number:'))
# try:
# c.append(l[int(y - 1)])
# for i in c:
# s_use = sum(p[l.index(i)])
# if s_use >= salary:
# print('too expensive!')
# break
# else:
# salary = int(salary - s_use)
# print('ok,you still have %d' % salary)
# print(shopping_car)
# except IndexError:
# print('can\'t find your product.')
s_less = salary
while 1:
#大循环进入购物流程
show_list()
#展示商品列表
try:
#测试环节用于确认y的值，并且引导错误值退出购物流程
#当错误值被输入，但是用户想继续购物流程，输入除q以外的值就可以继续购物
#注意，x=='q'or'n'的写法，就相当于x=='q'or True
#python中，字符串所表达的布尔值为1，所以，无论输入什么值都会进入if
y = int(input('chose the number:'))
if (y-1)<len(l):
shopping_car.append(l[y - 1])
s_less = s_less - int(p[y-1])
if s_less<0:
print('you don\'t have enough money!')
shopping_car.pop()
print('you have bought:',shopping_car)
s_less = salary
continue
else:
print('ok,you still have %d' % s_less)
print('and you have bought:',shopping_car)
else:
print('不要乱输！重新来')
continue
except ValueError:
print('pardon me? do you want to quit?')
x = input('press "q" to quit:')
if x=='q':
break
else:
continue
组长代码
思维导图
代码
products = [ 'iPhone7' ,'未来简史' ,'麦斯威尔咖啡' ,'羊角面包' ,'特仑苏牛奶']
prices = [ '5500' ,'30' ,'20' ,'15' ,'10']
shopping_cart = []
shopping_cart_price = []
while True:
money_left = input( "请输入您本次购物的预算金额：" ) #未限定用户输入整型，须注意后续购物时转换为整型
if money_left == "quit": #此步骤用户亦可输入quit退出；
print("您本次并未购物，byebye!")
exit()
elif money_left.isdigit() == False and money_left != quit: #非数字且非quit，报错重新输入
print("错误请求！只能输入预算金额或quit。")
print("----------------------")
elif int(money_left) > 0 : #数字＞0，跳出循环；
money_left = int(money_left)
print("----------------------")
break
else: #数字＜=0，报错重新输入；
print("错误请求！只能输入预算金额或quit。")
print("----------------------")
while True:
print("以下为在售商品列表：")
for product_code in range(len(products)): #以列表长度作为循环条件，便于list扩展
print((product_code + 1), products[product_code], prices[product_code]) #编号+1显示，提升体验…
demand = input ( '购买对应商品请输入编号（quit退出）：')
print("----------------------")
if demand == "quit":
if len(shopping_cart) > 0 :
print("您的购物车内有以下商品：")
for product_buy_code in range(len(shopping_cart)):
print(shopping_cart[product_buy_code] ,shopping_cart_price[product_buy_code])
print("您的余额为:",money_left ,"欢迎再来！")
break
else :
print("您本次并未购物，byebye!")
break
elif demand.isdigit() == False and demand != quit :
print("错误请求！只能输入商品编号或quit。")
print("----------------------")
elif int(demand) -1 >= 0 and int(demand) -1 < len(products) : #之前挖的坑…
demand = int(demand) - 1
if int(prices[demand]) > money_left :
print("余额不足！请选择其他商品，差额：" ,int(prices[demand]) - money_left )
print("您的余额为:", money_left)
print("----------------------")
else :
demand = int(demand)
money_left = money_left - int(prices[demand])
shopping_cart.append( products[demand])
shopping_cart_price.append( prices[demand])
print("购买成功！您的购物车内有以下商品:")
for product_buy_code in range(len(shopping_cart)):
print(shopping_cart[product_buy_code])
print("您的余额为:", money_left )
print("----------------------")
else:
print("错误请求！只能输入商品编号或quit。")
print("----------------------")
<wiz_tmp_tag id="wiz-table-range-border" contenteditable="false" style="display: none;">
