购物车程序
需求:. 启动程序后,让用户输入工资,然后打印商品列表. 允许用户根据商品编号购买商品. 用户选择商品后,检测余额是否够,够就直接扣款,不够就提醒.用户可一直购买商品,也可随时退出,退出时打印已购的商和余额# 商品列表 product_list = [ ('Iphone8', 6888), ('MacPro', 14800), ('小米6', 2499), ('bike', 800), ('Coffee', 31), ('Nike Shoes', 799), ] # 购物车 shopping_list = [] salary = input("输入您的薪水:") if salary.isdigit(): # 检测字符串是否只由数字组成 salary = int(salary) run_flag = True while run_flag: print(str.center('商品列表', 30, '-')) for k, v in enumerate(product_list): print('%s. %s %s' % (k, v[0], v[1])) choice = input("请输入想买商品的编号,退出请输入q:") if choice.isdigit(): choice = int(choice) print(choice) if choice >= 0 and choice < len(product_list): item_price = product_list[choice] if item_price[1] <= salary: #买得起 shopping_list.append(item_price) # 追加到购物车 salary -= item_price[1] print("%s添加到购物车,您当前余额是:%d" % (item_price, salary)) else: print('您当前余额不足') else: print('商品不存在') elif choice == 'q' or choice == 'Q': if len(shopping_list) > 0: print(str.center('您已购买以下商品', 30, '-')) for k, v in enumerate(shopping_list): print('%s. %s %s' % (k, v[0], v[1])) print("您当前余额:%d" % salary) run_flag = False