用c++编写atm程序

#include <iostream>using namespace std;///////////////////////////////用户类//////////////////////////////////////class user{private: int money; string username; string password;public: user(); ~user(); user(string username, string password); int s**emoney(int money);// 存款 int getmoney(int money); // 取款 int checkmoney(); // 查询余额 string getusername(); // 取得用户名 string getpassword(); // 取得密};user::user(){ money = 0;}user::user(string username, string password){ money = 0; th**->username = username; th**->password = password;}int user::s**emoney(int money){ th**->money += money; return th**->money;}int user::getmoney(int money){ th**->money -= money; return th**->money;}int user::checkmoney(){ return th**->money;}string user::getusername(){ return th**->username;}string user::getpassword(){ return th**->password;}////////////////////////////////////////////////////////////////////////////////////////////////////////////数据库类，用来存储用户//////////////////////class database{private: user *users[40]; // 默认数据可最多能存放40个用户 int usernumber; // 已注册用户的数量public: database(); ~database(); bool add(user *user); // 添加新用户 user * getuser(int i); // 按照索引取得用户 user * getuser(string name); // 按照用户名取得用户 int getusernumber(); // 取得数据库中用户的数量};database::database(){ usernumber = 0;}database::~database(){ delete users;}bool database::add(user *user){ if(usernumber < 40 && getuser(user->getusername()) == **) // 如果当前用户名在数据库中不存在 { users[usernumber] = user; usernumber++; return true; // 返回true表示新用户添加成功 } return false; // 返回false表示新用户添加失败}user * database::getuser(int i){ if(i > 40 || i < 0) return **; return users[i];}user * database::getuser(string username){ for(int i = 0; i < usernumber; i++) { user *user = getuser(i); if(user->getusername() == username) return user; } return **;}/////////////////////////////////////////////////////////////////////////database database;int welcom();// 注册user * user_reg**ter();user * user_login();int exit();int user_process();int main(){ int state; int user_state; user *user; do { state = welcom(); switch(state) { case 1: user = user_reg**ter(); // 用户注册 if(** != user) { cout<<"\n注册成功\n"; do { user_state = user_process(); switch(user_state) { case 1:// 存钱 { cout<<"输入存钱金额："; int num; cin>>num; cout<<"余额为："<<user->s**emoney(num)<<endl;; } break; case 2:// 取钱 { cout<<"输入取钱金额："; int num; cin>>num; cout<<"余额为："<<user->getmoney(num)<<endl; } break; case 3:// 查看余额 { cout<<"余额为："<<user->checkmoney()<<endl; } break; case 4://返回 user_state = 0; default: break; } } while(user_state); user = **; } else cout<<"\n注册失败\n"; break; case 2: user = user_login(); // 用户登陆 if(** != user) { cout<<"登陆成功"<<endl; do { user_state = user_process(); switch(user_state) { case 1:// 存钱 { cout<<"输入存钱金额："; int num; cin>>num; cout<<"余额为："<<user->s**emoney(num)<<endl;; } break; case 2:// 取钱 { cout<<"输入取钱金额："; int num; cin>>num; cout<<"余额为："<<user->getmoney(num)<<endl; } break; case 3:// 查看余额 { cout<<"余额为："<<user->checkmoney()<<endl; } break; case 4://返回 user_state = 0; default: break; } } while(user_state); user = **; } else cout<<"\n登陆失败\n"; break; case 3: state = exit(); break; default: break; } } while(state); return 0;}int welcom(){ cout<<"\t\t**********欢迎使用atm系统**********\n"; cout<<"\t\t* 1.用户注册 *\n"; cout<<"\t\t* 2.用户登录 *\n"; cout<<"\t\t* 3.退出系统 *\n"; cout<<"\t\t***********************************\n"; int num; cin>>num; return num;}// 注册user * user_reg**ter(){ string username; string password; cout<<"请输入账号："; cin>>username; if(** != database.getuser(username)) // 如果用户名存在 return **; // 注册失败 cout<<"请输入密码："; cin>>password; user *user = new user(username, password); database.add(user); return user; // 注册成功}user * user_login(){ string username; string password; cout<<"请输入账号："; cin>>username; cout<<"请输入密码："; cin>>password; user *user = database.getuser(username); if(** != user) // 如果用户存在 if(user->getpassword() == password) return user; // 如果密码匹配则登陆成功 return **; // 如果用户不存在}int exit(){ return 0; // 退出系统}int user_process(){ cout<<"\t\t******************************\n"; cout<<"\t\t* 请选择操作类型 *\n"; cout<<"\t\t* 1.存 钱 *\n"; cout<<"\t\t* 2.取 钱 *\n"; cout<<"\t\t* 3.查 看 余 额 *\n"; cout<<"\t\t* 4.返 回 *\n"; cout<<"\t\t******************************\n"; int num; cin>>num; return num;} 20210311