简易购物车程序
salary = int(input("Input your salary:")) goods_list ={"MacPro":"12000","iphone 8":"8000","iphone X":"10000","starbucks latte":"25","book":"50","bread":"5","shampoo":"25"} available_goods = list() # available_goods 保存的是根据salary可以买的商品 for i in goods_list: if salary >= int(goods_list[i]): available_goods.append(i) if len(available_goods) == 0: print("You have no enought money, now exit.") exit() print("Goods for you:") goods_order = 1 for j in available_goods: print("{goods_order}: {j}, price: {goods}".format(goods_order=goods_order,j=j, goods=goods_list[j])) goods_order += 1 # print(len(available_goods)) # 有多少个商品可以买 chose_list = dict() total_price = 0 total_price_tmp = 0 while True: choose_order = int(input("Please choose an item:")) while choose_order > len(available_goods) or choose_order <= 0: # 如果可购买商品列表范围,则提示用户直到输入的order存在为止 choose_order = int(input("The item you selected not exsit, try again:")) choose_order_num = int(input("How many do you want?")) if available_goods[choose_order-1] in chose_list: chose_list[available_goods[choose_order - 1]] = chose_list[available_goods[choose_order-1]] + choose_order_num else: chose_list[available_goods[choose_order-1]] = choose_order_num print(chose_list) for k in chose_list: total_price_tmp = total_price_tmp + int(goods_list[k])*chose_list[k] total_price = total_price_tmp total_price_tmp = 0 if salary < total_price: print("The total price of your items is {total_price}".format(total_price=total_price)) print("You don't have enought balance. please try again.") chose_list.clear() total_price = 0 else: print("The total price of your items is {total_price}".format(total_price=total_price)) buy_again = input("'c'to calculate, 'q' to cancel, other key to continue:") if buy_again == "q": print("Cancel all. Your balance is {salary}".format(salary=salary)) break elif buy_again == 'c': balance = salary - total_price if balance == salary: print("Your balance is {balance}, you didn't buy anything.".format(balance=balance)) else: print("Your balance is {balance}, the items you bought are blow:".format(balance=balance)) for item in chose_list: print("{item}, amount: {count}, cost {price}".format(item = item, count = chose_list[item], price = int(chose_list[item]) * int(goods_list[item]))) break