C++银行管理系统

银行管理系统，主要可以实现存储，开户，销户，转账，查询，挂失，解挂等功能，本系统采用文件存储，一个文件保存银行工作者的姓名和密码，另一个保存存款人员的所有信息，这里面主要是用了友元类，实现一个类 对另一个类的私有成员的调用。不管怎莫说，这也是我第一个c++稍微大一点的程序代码，我还是比较满意，开始被文件读写给难住了，后来学习了一下，感觉比还好用！废话不多说，上代码

#ifndef __BANK_H
#define __BANK_H
#include "User.h"

#include <cstring>
#include <string>
#include <vector>

using namespace std;
const int upNum = 1000;

class Bank
{
public:
Bank();//从文件中读数据到数组中
~Bank();//写入文件
void work();//业务驱动
void openAccount();//开户
void cancelAccount();//注销账户
void save();//存款
void withdraw();//取款
void showAccount();//查询余额
void transferAccounts();//转账
void reportLoss();//挂失
void cancelLoss();//解挂
void updataPassword();//更改密码
int getUser();//输入账号查询用户
private:
int N;//用户数目
User users[upNum];
};

int pass();
int chooseInMenu();
int inputPassword();

#endif

#pragma once
#include <string>
#include <iostream>

using namespace std;
class bank;

class User
{
public:
User()
{}
void setUser(int acc, string nam, int pw, double bal, int sta);
void showName();
void showBalance(string prompt);
bool passwordIsright();
bool isNormalUser();
friend class Bank;
private:
int account;//账号
int password;//密码
string name;//用户名
double balance;//账户余额
int status;//0.正常 1.挂失 2 销户
};

#include "User.h"
#include "bank.h"

void User::setUser(int acc, string nam, int pw, double bal, int sta)
{
this->account = acc;
this->name = nam;
this->password = pw;
this->balance = bal;
this->status = sta;
}

void User::showName()
{
cout << "账户姓名：" << name << endl;
}

void User::showBalance(string prompt)
{
cout << prompt << "余额:" << balance << endl;
}

bool User::passwordIsright()
{
int i = 0;
while (password / 10 > 10)
i++;
if (i > 0)
return true;
else
{
return false;
}
}

bool User::isNormalUser()
{
if (status == 0)
return true;
else
return false;
}

#include "bank.h"

#include<iostream>
#include<fstream>
#include<cstdlib>
#include<string>
#include<ctype.h>
using namespace std;

Bank::Bank()
{
ifstream infile("account.txt", ios::in);
if (!infile)
{
cerr << "open error" << endl;

exit(1);
}
int i = 0;
int acc;
string nam;
int pw;
double bal;
int sta;
while (infile >> acc >> nam >> pw >> bal >> sta)
{
users[i].setUser(acc, nam, pw, bal, sta);
i++;
}
N = i;
infile.close();
}

Bank::~Bank()
{
ofstream outfile("account.txt", ios::out);
if (!outfile)
{
cerr << "open error" << endl;
exit(1);
}

int i;
for (i = 0; i < N; i++)
{
outfile << users[i].account << " ";
outfile << users[i].name << " ";
outfile << users[i].password << " ";
outfile << users[i].balance << " ";
outfile << users[i].status << " ";
}
outfile.close();
}

void Bank::work()
{
int iChoice;

while (1)
{
iChoice = chooseInMenu();
switch (iChoice)
{
case 1:openAccount();break;
case 2:cancelAccount();break;
case 3:save();break;
case 4:withdraw();break;
case 5:getUser();break;
case 6:transferAccounts();break;
case 7:reportLoss();break;
case 8:cancelLoss();break;
case 9:updataPassword();break;
default:
break;
}
}
}

void Bank::openAccount()
{
if (N >= upNum)
{
cout << "用户已达上限" << endl;
return;
}
int acc;
string nam;
int pw;
double bal;
int sta;

cout << "正在开户" << endl;
acc = 1001 + N;
cout << "账号: " << acc << endl;
cout << "户主姓名：";
cin >> nam;
int iPass1, iPass2;
cout << "密码：";
iPass1 = inputPassword();
cout << "确认密码";
iPass2 = inputPassword();
if (iPass1 != iPass2)
{
cout << "密码输入不一致" << endl;
return;
}
pw = iPass1;
cout << "存入金额";
cin >> bal;
users
.account = acc;
users
.password = pw;
users
.status = 0;
users
.balance = bal;
cout << "开户成功" << endl;
N++;
}

void Bank::cancelAccount()
{
int i;
char ch;

while ((i = getUser()) == -1)
{
cout << "查无此账号，请重新输入：" << endl;
}
cout << "确认销户（y/n）" << endl;
cin >> ch;
if (ch == 'y')
{
cout << "取款1000元，销户成功" << endl;
users[i].status = 2;
users[i].balance = 0;

}
else {
return;
}

}

int Bank::getUser()
{
int acc;
int i;
int flag = 0;

cout << "请输入账号：";
cin >> acc;
for (i = 0; i < N; i++)
{
if (acc == users[i].account)
{
cout << "姓名:"<<users[i].name << endl;
cout << "账户余额："<<users[i].balance << endl;
cout << "当前状态："<<users[i].status << endl;
flag = i;
}
}
if (flag < i)
{
return flag;
}
else
return -1;

}

void Bank::save()
{
int i;
char ch;
int bal;

while ((i = getUser()) == -1)
{
cout << "查无此账号，请重新输入：" << endl;
}
cout << "请输入要存的金额：";
cin >> bal;
users[i].balance += bal;
cout << "存钱成功" << endl;
}

void Bank::withdraw()
{
int i;
char ch;
int bal;

while ((i = getUser()) == -1)
{
cout << "查无此账号，请重新输入：" << endl;
}
cout << "请输入要取的金额：";
cin >> bal;
if (users[i].balance < bal)
{
cout << "余额不足" << endl;
return;
}
else
{
users[i].balance -= bal;
}

cout << "取钱成功" << endl;
}

void Bank::transferAccounts()
{
int i;
char ch;
int bal;

while ((i = getUser()) == -1)
{
cout << "查无此账号，请重新输入：" << endl;
}
cout << "请输入要转的金额：";
cin >> bal;
users[i].balance += bal;
cout << "转账成功" << endl;
}

void Bank::reportLoss()
{
int i;
int pass;
char ch;
int bal;

while ((i = getUser()) == -1)
{
cout << "查无此账号，请重新输入：" << endl;
}
cout << "请输入密码" << endl;
cin >> pass;
if (users[i].password == pass)
{
cout << "挂失成功" << endl;
users[i].status = 1;
}
else {
cout << "密码输入错误" << endl;

}
}

void Bank::cancelLoss()
{
int pass;
char ch;
int bal;

while ((i = getUser()) == -1)
{
cout << "查无此账号，请重新输入：" << endl;
}
cout << "请输入密码" << endl;
cin >> pass;
if (users[i].password == pass)
{
cout << "解挂成功" << endl;
users[i].status = 0;
}
else {
cout << "密码输入错误" << endl;

}
}

void Bank::updataPassword()
{
int i;
char ch;
int bal;

while ((i = getUser()) == -1)
{
cout << "查无此账号，请重新输入：" << endl;
}

int iPass1, iPass2;
cout << "新密码：";
iPass1 = inputPassword();
cout << "确认密码";
iPass2 = inputPassword();
if (iPass1 != iPass2)
{
cout << "密码输入不一致" << endl;
return;
}
else
{
users[i].password = iPass1;
cout << "密码输入成功" << endl;
}

}

#include<iostream>
#include<fstream>
#include<conio.h>
#include<cstdlib>
#include<cstring>
#include<ctype.h>

#include"bank.h"
using namespace std;

int pass()//验证用户密码，正确返回1，错误返回0
{
char sNameInfile[20];
char sPassInfile[20];
ifstream infile("password.txt", ios::in);
if (!infile)
{
cout << "password file cannot open!" << endl;
system("pause");
exit(1);
}
infile >> sNameInfile >> sPassInfile;
infile.close();

char sName[20];
char sPass[20];
char ch;
int iTry = 3;
int right = 0;

do
{
cout << "请输入业务员用户名：";
cin >> sName;
cout << "请输入密码:";
int i = 0;
while ((ch = getch()) != '\r')
{
sPass[i++] = ch;
putchar('*');
}
sPass[i] = '\0';
fflush(stdin);
cout << endl;
if (strcmp(sPass, sPassInfile) == 0 && strcmp(sName, sNameInfile) == 0)
{
right = 1;
break;
}
else
{
iTry--;
if (iTry < 0)
cout << "对不起，您已输入超过三次	" << endl;

}

} while (iTry);
return right;
}

int chooseInMenu()
{
int i;
while (1)
{
cout << endl;
cout << "+------------------------------------+" << endl;
cout << "+       1 开户  2 销户  3 存款        +" << endl;
cout << "+       4 取款  5 查询  6 转账        +" << endl;
cout << "+       7 挂失  8 解挂  9 改密        +" << endl;
cout << "+                      0 退出        +" << endl;
cout << "+------------------------------------+" << endl;
cout << "请输入操作指令：";
cin >> i;
if (i >= 0 && i <= 9)
break;
else
cout << "请重新输入" << endl;

}
return i;
}

int inputPassword()
{
char ch;
int iPass = 0;
int i;
while (1)
{
for (i = 0; i < 6; i++)
{
ch = getch();
putchar('*');
if (isdigit(ch))
iPass = iPass * 10 + (ch - '0');
else
{
iPass = 0;
break;
}
}
fflush(stdin);
cout << endl;
if (iPass == 0)
{
cout << "密码要求全为数字" << endl;
cout << "请重新输入" << endl;
}
else
break;
}
return iPass;
}

#include<iostream>
#include"bank.h"
using namespace std;

int main()
{
cout << "+-------------------------------------------+" << endl;
cout << "               欢迎光临csdn银行              " << endl;
cout << "+-------------------------------------------+" << endl;

Bank b;
if (pass())
{
Bank b;
b.work();
}
}