Python模拟自动存取款机的查询、存取款、修改密码等操作
时间:2022-01-11 10:32 作者:admin
1.工作流程
2.模拟自动存取款机的操作
代码如下:
import msvcrt, sys, os#定义用星号隐藏密码输入的函数def psw_input(): li = [] while True: ch = msvcrt.getch() #回车 if ch == b'\r': msvcrt.putch(b'\n') break #退格 elif ch == b'\x08': if li: li.pop() msvcrt.putch(b'\b') msvcrt.putch(b' ') msvcrt.putch(b'\b') #Esc elif ch == b'\x1b': break else: li.append(ch) msvcrt.putch(b'*') return li#定义CSDN银行ATM欢迎界面的函数def ATM(): ''' CSDN银行ATM欢迎界面的函数 ''' print("="*14,"Bank of CSDN","="*14,"\n") print("{:^42}".format("ATM"),"\n") print("="*14,"Bank of CSDN","="*14,"\n")#CSDN银行用户列表信息,用户信息包含:姓名、余额、密码(6位)、银行卡号(19位)user_list = [{"name":"张 三","balance":10000,"password":"000000","numbers":"0000000000000000000"},{"name":"李 四","balance":20000,"password":"111111","numbers":"1111111111111111111"},{"name":"王 五","balance":30000,"password":"222222","numbers":"2222222222222222222"}]#定义验证银行卡号与密码匹配的函数def check(user_name,user_password): ''' 验证银行卡号与密码匹配的函数 ''' for i in range(len(user_list)): if user_name == user_list[i]["numbers"] and user_password == user_list[i]["password"]: return i #银行卡号与密码匹配则返回该用户在ATM系统内的ID值,否则返回None值#定义用户登录成功后操作界面的函数def interface(): ''' 用户登录成功后操作界面的函数 ''' print("="*14,"用户操作界面","="*14,"\n") print("{0:2} {1:12} {2:12} {3:12}".format(" ","1. 查询","2. 取款","3. 存款"),"\n") print("{0:2} {1:10} {2:12}".format(" ","4. 修改密码","5. 退出"),"\n") print("="*42,"\n")#定义用户查询信息的函数def inquire(user_id): ''' 用户查询信息的函数 ''' print("="*14,"账号查询界面","="*14,"\n") print("|{0:<4}|{1:<18}|{2:<9}|\n".format("账户名","卡号","余额(RMB)")) print("|{0:<5}|{1:<20}|{2:<11}|\n".format(user_list[user_id]["name"],user_list[user_id]["numbers"],user_list[user_id]["balance"]))#定义用户取款的函数def withdrawal(amount): ''' 用户取款的函数 ''' i = user_list[user_id]["balance"]-int(amount) if i>=0: user_list[user_id]["balance"]-=int(amount) else: print("账户余额不足\n")#定义用户存款的函数def deposit(amount): ''' 用户存款的函数 ''' user_list[user_id]["balance"]+=int(amount)#定义用户修改密码的函数def change_password(old_password,new_password1,new_password2): ''' 用户修改密码的函数 ''' if old_password == user_list[user_id]["password"]: if new_password1 == new_password2: user_list[user_id]["password"] = new_password1 print("新密码修改成功\n") return 1 else: print("修改密码失败,您2次输入的新密码不一致\n") return 2 else: print("旧密码输入错误\n") return 0#用户登录界面,输入银行卡号和密码chance = 3 #允许3次用户名或密码输入错误while True: ATM() user_name = input("请输入您的银行卡卡号:") print("") print("请输入您的银行卡密码:", end=' ', flush=True) user_password = b''.join(psw_input()).decode() print("") user_id = check(user_name,user_password)#验证银行卡号与密码是否匹配 if user_id != None: print("登录成功\n") while True: interface() key_word = input("请输入操作选项:") print("") if key_word == "1": inquire(user_id) input("按任意键返回上一级目录:") print("") elif key_word == "2": print("="*14,"账号取款界面","="*14,"\n") amount = input("请输入取款金额:") print("") withdrawal(amount) inquire(user_id) input("按任意键返回上一级目录:") print("") elif key_word == "3": print("="*14,"账号存款界面","="*14,"\n") amount = input("请输入存款金额:") print("") deposit(amount) inquire(user_id) input("按任意键返回上一级目录:") print("") elif key_word == "4": print("="*14,"密码管理界面","="*14,"\n") print("请输入旧密码:", end=' ', flush=True) old_password = b''.join(psw_input()).decode() print("") print("请输入新密码:", end=' ', flush=True) new_password1 = b''.join(psw_input()).decode() print("") print("请再次输入新密码:", end=' ', flush=True) new_password2 = b''.join(psw_input()).decode() print("") save = change_password(old_password,new_password1,new_password2) #如何检测到旧密码输入有误,将直接退出 if save == 0: break elif key_word == "5": print("="*14,"欢迎下次光临","="*14,"\n") break else: print("="*14,"没有该选项","="*14,"\n") else: if chance > 1: print("用户名或密码错误,您还有",chance-1,"次机会,请重新输入\n") chance -= 1 else: print("对不起,您输入用户名或密码错误已达3次") break
3.运行结果
有以下初始用户信息备测试用:
姓名银行卡号(19位)密码(6位)余额(RMB)
张 三000000000000000000000000010000
李 四111111111111111111111111120000
王 五222222222222222222222222230000
输入卡号和密码进入用户操作界面
查询余额界面
取款界面
存款界面
修改密码界面
总结
以上所述是小编给大家介绍的python/' target='_blank'>python模拟自动存取款机的查询、存取款、修改密码等操作,希望对大家有所帮助,如果大家有任何疑问欢迎给我留言,小编会及时回复大家的!
(责任编辑:admin)