## 一、项目介绍
这是一个用C++面向对象思想编写的简易银行账户管理系统，专门给刚学完C++类和对象的同学练手用的。只需要一个cpp文件，就能实现完整的银行账户管理功能。
**功能特点：**
– 纯C++标准库实现，无需第三方依赖
– 面向对象设计，封装性好
– 支持开户（创建账户）
– 支持存款
– 支持取款
– 支持查询余额
– 支持账户间转账
– 支持查看所有账户
– 控制台界面，操作简单直观
**适合人群：**
– 刚学完C++类和对象的新手
– 想练习面向对象编程的同学
– 需要做课程设计的学生
– 想了解封装、继承、多态的初学者
二、效果展示
/*
* C++简易银行账户管理系统
* 功能：面向对象练习，存款取款查询等
* 用类和对象实现
*/
#include <iostream>
#include <string>
#include <vector>
#include <iomanip>
#include <ctime>
using namespace std;
// 交易记录结构体
struct Transaction {
string type; // 交易类型：存款、取款、转账
double amount; // 金额
double balance; // 交易后余额
string time; // 交易时间
string description; // 备注
};
// 银行账户类
class BankAccount {
private:
string accountNumber; // 账号
string ownerName; // 户主姓名
double balance; // 账户余额
string password; // 账户密码
vector<Transaction> transactions; // 交易记录
// 获取当前时间字符串
string getCurrentTime() {
time_t now = time(0);
char* dt = ctime(&now);
string timeStr(dt);
// 去掉换行符
if (!timeStr.empty() && timeStr.back() == '\n') {
timeStr.pop_back();
}
return timeStr;
}
// 添加交易记录
void addTransaction(string type, double amount, string description = "") {
Transaction t;
t.type = type;
t.amount = amount;
t.balance = balance;
t.time = getCurrentTime();
t.description = description;
transactions.push_back(t);
}
public:
// 构造函数
BankAccount(string accNum, string name, double initialBalance, string pwd)
: accountNumber(accNum), ownerName(name), balance(initialBalance), password(pwd) {
// 添加开户记录
addTransaction("开户", initialBalance, "账户开立");
}
// 验证密码
bool verifyPassword(string pwd) {
return password == pwd;
}
// 存款
bool deposit(double amount) {
if (amount <= 0) {
cout << "存款金额必须大于0！" << endl;
return false;
}
balance += amount;
addTransaction("存款", amount);
cout << "存款成功！存入 " << fixed << setprecision(2) << amount << " 元" << endl;
return true;
}
// 取款
bool withdraw(double amount) {
if (amount <= 0) {
cout << "取款金额必须大于0！" << endl;
return false;
}
if (amount > balance) {
cout << "余额不足，取款失败！" << endl;
return false;
}
balance -= amount;
addTransaction("取款", amount);
cout << "取款成功！取出 " << fixed << setprecision(2) << amount << " 元" << endl;
return true;
}
// 转账
bool transfer(BankAccount& toAccount, double amount) {
if (amount <= 0) {
cout << "转账金额必须大于0！" << endl;
return false;
}
if (amount > balance) {
cout << "余额不足，转账失败！" << endl;
return false;
}
// 从本账户扣除
balance -= amount;
addTransaction("转账支出", amount, "转给 " + toAccount.getOwnerName());
// 转入对方账户
toAccount.balance += amount;
toAccount.addTransaction("转账收入", amount, "来自 " + ownerName);
cout << "转账成功！转出 " << fixed << setprecision(2) << amount << " 元给 " << toAccount.getOwnerName() << endl;
return true;
}
// 查询余额
void checkBalance() {
cout << "\n账户余额：" << fixed << setprecision(2) << balance << " 元" << endl;
}
// 显示账户信息
void showAccountInfo() {
cout << "\n========== 账户信息 ==========" << endl;
cout << "账号：" << accountNumber << endl;
cout << "户主：" << ownerName << endl;
cout << "余额：" << fixed << setprecision(2) << balance << " 元" << endl;
cout << "交易记录：" << transactions.size() << " 条" << endl;
cout << "================================" << endl;
}
// 显示交易记录
void showTransactions() {
if (transactions.empty()) {
cout << "暂无交易记录！" << endl;
return;
}
cout << "\n========== 交易记录 ==========" << endl;
cout << left << setw(12) << "交易类型"
<< setw(12) << "金额"
<< setw(12) << "余额"
<< setw(25) << "时间" << endl;
cout << string(60, '-') << endl;
for (const auto& t : transactions) {
cout << left << setw(12) << t.type
<< setw(12) << (fixed << setprecision(2) << t.amount)
<< setw(12) << (fixed << setprecision(2) << t.balance)
<< setw(25) << t.time << endl;
}
cout << "================================" << endl;
}
// 修改密码
bool changePassword(string oldPwd, string newPwd) {
if (!verifyPassword(oldPwd)) {
cout << "原密码错误，修改失败！" << endl;
return false;
}
if (newPwd.length() < 4) {
cout << "新密码长度不能少于4位！" << endl;
return false;
}
password = newPwd;
cout << "密码修改成功！" << endl;
return true;
}
// Getter方法
string getAccountNumber() { return accountNumber; }
string getOwnerName() { return ownerName; }
double getBalance() { return balance; }
};
// 银行系统类
class BankSystem {
private:
vector<BankAccount*> accounts; // 账户列表
BankAccount* currentAccount; // 当前登录的账户
public:
// 构造函数
BankSystem() : currentAccount(nullptr) {
// 初始化一些示例账户
initSampleAccounts();
}
// 析构函数
~BankSystem() {
for (auto acc : accounts) {
delete acc;
}
}
// 初始化示例账户
void initSampleAccounts() {
accounts.push_back(new BankAccount("6222021234567890001", "张三", 5000.0, "123456"));
accounts.push_back(new BankAccount("6222021234567890002", "李四", 3200.5, "123456"));
accounts.push_back(new BankAccount("6222021234567890003", "王五", 10000.0, "123456"));
}
// 开户
void openAccount() {
cout << "\n--- 开户 ---" << endl;
string name, pwd;
double initialDeposit;
cout << "请输入您的姓名：";
cin >> name;
cout << "请设置密码（至少4位）：";
cin >> pwd;
cout << "请输入初始存款金额：";
cin >> initialDeposit;
if (pwd.length() < 4) {
cout << "密码长度不足4位，开户失败！" << endl;
return;
}
if (initialDeposit < 0) {
cout << "初始存款不能为负数，开户失败！" << endl;
return;
}
// 生成账号（简单模拟）
string accNum = "622202" + to_string(1234567890000 + accounts.size() + 1);
BankAccount* newAcc = new BankAccount(accNum, name, initialDeposit, pwd);
accounts.push_back(newAcc);
cout << "\n开户成功！" << endl;
cout << "您的账号是：" << accNum << endl;
cout << "请牢记您的密码！" << endl;
}
// 登录
bool login() {
cout << "\n--- 登录 ---" << endl;
string accNum, pwd;
cout << "请输入账号：";
cin >> accNum;
cout << "请输入密码：";
cin >> pwd;
for (auto acc : accounts) {
if (acc->getAccountNumber() == accNum) {
if (acc->verifyPassword(pwd)) {
currentAccount = acc;
cout << "登录成功！欢迎您，" << acc->getOwnerName() << endl;
return true;
} else {
cout << "密码错误，登录失败！" << endl;
return false;
}
}
}
cout << "账号不存在，登录失败！" << endl;
return false;
}
// 登出
void logout() {
currentAccount = nullptr;
cout << "已退出登录！" << endl;
}
// 显示主菜单（登录后）
void showAccountMenu() {
cout << "\n" << string(40, '=') << endl;
cout << " 银行账户管理系统" << endl;
cout << " 当前用户：" << currentAccount->getOwnerName() << endl;
cout << string(40, '=') << endl;
cout << " 1. 存款" << endl;
cout << " 2. 取款" << endl;
cout << " 3. 转账" << endl;
cout << " 4. 查询余额" << endl;
cout << " 5. 查看账户信息" << endl;
cout << " 6. 查看交易记录" << endl;
cout << " 7. 修改密码" << endl;
cout << " 0. 退出登录" << endl;
cout << string(40, '=') << endl;
cout << "请输入您的选择：";
}
// 处理账户操作
void handleAccountOperations() {
int choice;
while (true) {
showAccountMenu();
cin >> choice;
switch (choice) {
case 1: {
// 存款
double amount;
cout << "\n请输入存款金额：";
cin >> amount;
currentAccount->deposit(amount);
break;
}
case 2: {
// 取款
double amount;
cout << "\n请输入取款金额：";
cin >> amount;
currentAccount->withdraw(amount);
break;
}
case 3: {
// 转账
cout << "\n--- 转账 ---" << endl;
string toAccNum;
double amount;
cout << "请输入对方账号：";
cin >> toAccNum;
cout << "请输入转账金额：";
cin >> amount;
// 查找对方账户
BankAccount* toAcc = nullptr;
for (auto acc : accounts) {
if (acc->getAccountNumber() == toAccNum) {
toAcc = acc;
break;
}
}
if (toAcc == nullptr) {
cout << "对方账号不存在，转账失败！" << endl;
} else if (toAcc == currentAccount) {
cout << "不能给自己转账！" << endl;
} else {
currentAccount->transfer(*toAcc, amount);
}
break;
}
case 4: {
// 查询余额
currentAccount->checkBalance();
break;
}
case 5: {
// 查看账户信息
currentAccount->showAccountInfo();
break;
}
case 6: {
// 查看交易记录
currentAccount->showTransactions();
break;
}
case 7: {
// 修改密码
string oldPwd, newPwd;
cout << "\n请输入原密码：";
cin >> oldPwd;
cout << "请输入新密码：";
cin >> newPwd;
currentAccount->changePassword(oldPwd, newPwd);
break;
}
case 0: {
logout();
return;
}
default:
cout << "输入有误，请重新选择！" << endl;
}
}
}
// 显示欢迎菜单
void showWelcomeMenu() {
cout << "\n" << string(40, '=') << endl;
cout << " 欢迎使用简易银行账户管理系统" << endl;
cout << string(40, '=') << endl;
cout << " 1. 登录账户" << endl;
cout << " 2. 开立新账户" << endl;
cout << " 0. 退出系统" << endl;
cout << string(40, '=') << endl;
cout << "请输入您的选择：";
}
// 运行系统
void run() {
int choice;
while (true) {
showWelcomeMenu();
cin >> choice;
switch (choice) {
case 1:
if (login()) {
handleAccountOperations();
}
break;
case 2:
openAccount();
break;
case 0:
cout << "\n感谢使用银行账户管理系统，再见！" << endl;
return;
default:
cout << "输入有误，请重新选择！" << endl;
}
}
}
};
int main() {
BankSystem bank;
bank.run();
return 0;
}
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