Python学习第二天-编写购物车
需求:1.启动程序后,让用户输入工资,然后打印商品列表
2.允许用户根据商品编号购买商品
3.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
4.可随时退出,退出时,打印已购买商品和余额
# Author: zfh #-*-coding:utf-8-*- product_list = [ ('Oracle book',100), ('pencil', 10), ('rule',100), ('iphone',2000), ('box',200) ] shopping_list = [] shopping_cost = 0 shopping_num = 0 i = 0 while i < 3 : salary = input("Input your salary:") if salary.isdigit(): salary = int(salary) while True: for index,item in enumerate(product_list): print(index,item) user_choice = input("Please choice >>>:") if user_choice.isdigit(): user_choice = int(user_choice) if user_choice < len(product_list) and user_choice >= 0: p_item = product_list[user_choice] if p_item[1] <= salary: shopping_list.append(p_item) salary -= p_item[1] shopping_cost += p_item[1] shopping_num += 1 print("Added %s into shopping cart,your current balance is \033[31;1m %s \033[0m" %(p_item,salary)) else: print("\033[41;1m你的余额只剩[%s]" % salary) else: print("商品不存在,请重新选择!".center(50,'-')) elif user_choice == 'q': print("shopping_list".center(50,'-')) for p in shopping_list: print(p) print("共花费 %s 元," % shopping_cost,"共购买件 %s 商品" % shopping_num) print("Your current balance:",salary) exit() else: print("invalid option".center(50,'-')) else: print("输入错误,请重新输入金额".center(50,'-')) i += 1