程序：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
- 可随时退出，退出时，打印已购买商品和余额
- 如余额不足，可充值
1 #coding=utf-8 2 #Version:python 3.6.0 3 #Tools:Pycharm 2017.3.2 4 _date_ = '2018/4/16/016 14:50' 5 _author_ = 'Hongyong' 6 7 salary = int(input("Please input your salary: ")) 8 shopping_mart = [] 9 items = (["Huawei","￥",2800], 10 ["Earphone","￥",300], 11 ["Book","￥",80]) 12 msg_items = ''' 13 ----------items---------- 14 1. Huawei ￥ 2800 15 2. Earphone ￥ 300 16 3. Book ￥ 80 17 ------------------------- 18 ''' 19 while True: 20 print(msg_items) 21 user_choice = input("Please choose goods: ") 22 if user_choice.isdigit(): 23 p_index = int(user_choice) 24 if p_index > 0 and p_index <= len(items): 25 if salary >= items[p_index - 1][2]: 26 shopping_mart.append(items[p_index- 1]) 27 salary -= int(items[p_index - 1][2]) 28 print("You have bought {name} !".format(name=items[p_index - 1][1])) 29 print("Your balance is: ￥", salary) 30 else: 31 print("Your balance is not enough! Please try sth else.") 32 recharge_ans = input("Do you want to recharge?") 33 if recharge_ans == "y": 34 recharge = int(input("Please input money: ")) 35 print("Please wait for a while...") 36 salary += recharge 37 print("You have recharged successfully!") 38 print("And the balance is: ", salary, "now!") 39 else: 40 print("Invalid Choice!") 41 print("You are supposed to enter from 1 to",len(items)) 42 elif user_choice == "q": 43 print("---------shopping list------------") 44 for index, ite in enumerate(shopping_mart): 45 print(index + 1, ite) 46 print("Your balance is: ￥", salary) 47 print("Welcome your next coming!") 48 print("Exit...") 49 exit() 50 else: 51 print("Invalid Choice!") 52 print("You are supposed to enter from 1 to", len(items))
程序效果
Please input your salary: 2 ----------items---------- 1. Huawei ￥ 2800 2. Earphone ￥ 300 3. Book ￥ 80 ------------------------- Please choose goods: 1 Your balance is not enough! Please try sth else. Do you want to recharge?y Please input money: 20000 Please wait for a while... You have recharged successfully! And the balance is: 20002 now! ----------items---------- 1. Huawei ￥ 2800 2. Earphone ￥ 300 3. Book ￥ 80 ------------------------- Please choose goods: 1 You have bought ￥ ! Your balance is: ￥ 17202 ----------items---------- 1. Huawei ￥ 2800 2. Earphone ￥ 300 3. Book ￥ 80 ------------------------- Please choose goods: Invalid Choice! You are supposed to enter from 1 to 3 ----------items---------- 1. Huawei ￥ 2800 2. Earphone ￥ 300 3. Book ￥ 80 ------------------------- Please choose goods: 2 You have bought ￥ ! Your balance is: ￥ 16902 ----------items---------- 1. Huawei ￥ 2800 2. Earphone ￥ 300 3. Book ￥ 80 ------------------------- Please choose goods: Invalid Choice! You are supposed to enter from 1 to 3 ----------items---------- 1. Huawei ￥ 2800 2. Earphone ￥ 300 3. Book ￥ 80 ------------------------- Please choose goods: 3 You have bought ￥ ! Your balance is: ￥ 16822 ----------items---------- 1. Huawei ￥ 2800 2. Earphone ￥ 300 3. Book ￥ 80 ------------------------- Please choose goods: q ---------shopping list------------ 1 ['Huawei', '￥', 2800] 2 ['Earphone', '￥', 300] 3 ['Book', '￥', 80] Your balance is: ￥ 16822 Welcome your next coming! Exit... Process finished with exit code 0