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C语言银行管理系统

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前言

这篇博客针对<<C语言银行管理系统>>编写代码，代码整洁，规则，易读。学习与应用推荐首选。

文章目录

一、所需工具软件

二、使用步骤

1. 引入库

2. 创建结构体

3. 创建元素操作函数

4. 运行结果

三、在线协助

一、所需工具软件

1. Visual Studio

2. C/C++

二、使用步骤

1.引入库

代码如下（示例）：

#include<stdlib.h>  
#include<iostream>
#include <string>
#include<fstream>
using namespace std;
class consumer;

2.创建结构体

代码如下（示例）：

class YH //银行类
{
public:
    void set_account();//银行开户功能
    void del_account();//注销账户功能
    void transfer(int);//转账功能
    void enter_account();//进入用户个人信息功能
    void addmoney(int, float);//存款功能
    void exitYH();//退出系统
    void functionshow();
    void save();
    void load();//功能界面
protected:
    consumer* account[20];
    static int acnum;//账户数
};

class consumer :public YH//用户类,继承银行类的属性
{
public:
    friend class YH;
    consumer(int id, string Name, int Number, double IN, string Company, string Address, string PassWord, float m)
    {
        ID = id; name = Name; number = Number; in = IN; company = Company; address = Address; money = m; = PassWord;
    }
    consumer()
    {
        ID = 0; name = '0'; number = 0; in = 0; company = '0'; address = '0'; money = 0; = '0';
    }
    int get_id() { return ID; }
    void savemoney();//取钱
    string () { return ; }//取得密码
    void display();
    void fetchmoney();//取钱
    void ();
    void add_money(float);//计算余额
    void dec_money(float);//计算余额
    float get_money();//卡卡转帐
private:
    int ID;//开户帐号
    string ; //用户密码
    string name; //用户姓名
    float money;//开户金额
    int number; string company; string address; double in;
};

3.创建元素操作函数：

代码如下（示例）：

void YH::save()
{
    ofstream outfile("bankdat.txt", ios::out);//以输出方式打开文件bankdat.dat接收从内存输出的数据
    int n = 0;
    outfile << acnum << " ";

    for (n = 0; n < acnum; n++)
    {
        outfile << account[n]->ID << " ";//把信息写入磁盘文件bankdat.dat
        outfile << account[n]->money << " ";
        outfile << account[n]->name << " ";
        outfile << account[n]-><< " ";
        outfile << account[n]->number << " ";
        outfile << account[n]->company << " ";
        outfile << account[n]->address << " ";
        outfile << account[n]->in << " ";
    }

    outfile.close();
}

/*读入用户信息功能实现*/

void YH::load()
{
    ifstream infile("bankdat.txt", ios::in);//以输入方式打开文件
    if (!infile)
    {
        cerr << "读取错误!" << endl;
        return;
    }
    int n = 0;
    int id, m;
    string nam, passw; int number; string company; string address; double in;
    infile >> acnum;
    for (n = 0; n < acnum; n++)//全部读入
    {
        infile >> id;//从磁盘文件bankdat.dat读入信息
        infile >> m;
        infile >> nam;
        infile >> passw;
        infile >> company;
        infile >> number;
        infile >> address;
        infile >> in;
        account[n]->;
        consumer* acc = new consumer(id, nam, number, in, company, address, passw, m); //每读入一个n开辟一段内存

        account[n] = acc; //赋值首地址

    }

    infile.close();

    cout << "系统正在正常运行，您可以办理以下业务：" << endl;

}

/*转账功能实现*/

void YH::transfer(int x)

{
    int id;

    cout << "请输入帐号:";

    cin >> id;

    int flag = 1;

    int i = 0;

    while ((i < acnum) && (flag)) //查找要转入的账号
    {
        if (id == account[i]->get_id()) flag = 0;
        else i++;
    }

    if (flag)
    {
        cout << "帐号不存在!" << endl << endl;
        return;
    }

    float b;
    cout << endl << "请输入你要转帐的金额:";
    cin >> b;
    while (b <= 0)
    {
        cout << "请输入正确的数字!" << endl;
        cout << "→";
        cin >> b;
    }

    if (account[x]->get_money() < b) //调用友元类consumer的公有成员函数
        cout << "对不起,金额不够!!" << endl;
    else { account[x]->dec_money(b); account[i]->add_money(b); }
    cout << "转账成功!!" << endl;
    return;
}

/*账户金额计算*/

void consumer::add_money(float x)
{
    money = x + money;
}
void consumer::dec_money(float x)
{
    money = money - x;
}
void YH::addmoney(int x, float y)
{
    account[x]->money = account[x]->money - y;
}
float consumer::get_money()
{
    return money;
}

int main()
{
    YH yh;
    yh.functionshow();
    return 0;
}

/*主界面显示*/

void YH::functionshow()
{
    int n;
    do
    {
        system("cls");
        load();
        cout << " ___________________________________________________________" << endl;
        cout << "|                                                           |" << endl;
        cout << "|                        1：开户                            |" << endl;
        cout << "|                                                           |" << endl;
        cout << "|                        2：账户登录                        |" << endl;
        cout << "|                                                           |" << endl;
        cout << "|                        3：账户注销                        |" << endl;
        cout << "|                                                           |" << endl;
        cout << "|                        4：退出系统                        |" << endl;
        cout << "|___________________________________________________________|" << endl;

        cout << endl << "请您输入你要进行的相应操作前的数字:" << endl;
        cout << "→";
        cin >> n;
        while (n < 1 || n>4)
        {
            cout << "您输入的数字有误！请重新输入!" << endl;
            cout << "→";
            cin >> n;
        }
        switch (n)
        {
        case 1:set_account();//开户
            break;
        case 2:enter_account();//登录
            break;
        case 3:del_account();//注销
            break;
        case 4:exitYH();//退出      
            break;
        }
        cin.get();//输入流类istream的成员函数
    } while (true);
}

void YH::enter_account()
{
    int id;
    cout << "请输入帐号:";
    cin >> id;
    int flag = 1;
    int i = 0;//__page_break__
    while ((i < acnum) && (flag)) //循环查找
    {
        if (id == account[i]->get_id()) flag = 0; else i++;
    }
    if (flag)
    {
        cout << "帐号不存在!" << endl;
        return;
    }
    cout << "请输入密码:";
    string passw;
    cin >> passw;
    if (passw != account[i]->()) return;//返回到登录界面
    account[i]->display(); cin.get(); cin.get();
    int n;
    do {
        system("cls");
        cout << "请选择下列操作：" << endl;
        cout << " ________________________________________________" << endl;
        cout << "|                                                |" << endl;
        cout << "|                1.查看账户信息                  |" << endl;
        cout << "|                                                |" << endl;
        cout << "|                2.取款                          |" << endl;
        cout << "|                                                |" << endl;
        cout << "|                3.存款                          |" << endl;
        cout << "|                                                |" << endl;
        cout << "|                4.修改密码                      |" << endl;
        cout << "|                                                |" << endl;
        cout << "|                5.转账                          |" << endl;
        cout << "|                                                |" << endl;
        cout << "|                6.返回                          |" << endl;
        cout << "|________________________________________________|" << endl;
        cout << "→";
        cin >> n;
        switch (n)
        {
        case 1: account[i]->display(); break;
        case 2: account[i]->fetchmoney(); save(); break;//从2-5功能，每执行一次调用一次save函数，重新写入数据
        case 3:account[i]->savemoney(); save(); break;
        case 4:account[i]->(); save(); break;
        case 5:transfer(i); save(); break;
        case 6:return;
        }cin.get(); cin.get();
    }

    while (1);

}

void YH::set_account()
{
    int id;
    string nam;
    string passw;
    float m;
    string company; string address; int number; double in;
    cout << "请输入开户账号：" << endl;
    cin >> id;
    cout << "请输入开户人姓名：" << endl;
    cin >> nam;
    cout << "请输入开户密码：" << endl;
    cin >> passw;
    cout << "请输入存入金额:" << endl;
    cin >> m;
    cout << "请输入开户人电话：" << endl;
    cin >> number;
    cout << "请输入开户人公司：" << endl;
    cin >> company;
    cout << "请输入开户人地址：" << endl;
    cin >> address;
    cout << "请输入开户人身份证号码：" << endl;
    cin >> in;
    while (m <= 0)
    {
        cout << "请输入正确的数字!" << endl;
        cin >> m;
    }

    consumer* acc = new consumer(id, nam, number, in, company, address, passw, m);
    account[acnum] = acc;
    cout << "您好，你已开户成功，请牢记您的账号和密码，注意账号安全！" << endl << endl;
    acnum++;
    save();
    cin.get();
    return;
}

void YH::del_account()
{
    int id;
    cout << endl << "请输入您要注销的帐户号:";
    cin >> id;
    int flag = 1;
    int i = 0;
    while ((i < acnum) && (flag)) //循环查找
    {
        if (id == account[i]->get_id())
        {
            flag = 0;
        }
        else
        {
            i++;
        }
    }
    if (flag)
    {
        cout << "对不起，你输入的该帐号不存在或有误，请重新输入!" << endl;
        return; //返回到登陆界面
    }
    for (int j = i; j < acnum; j++) //所有被删号后的数据重新存储
    {
        account[j] = account[j + 1];
    }
    account[acnum - 1] = NULL;
    acnum--; //账号总数自减一次
    cout << "您好，您的账号已成功注销！" << endl << endl;
    save();
    cin.get();
    return;
}

void consumer::()
{
    string pwd, repwd;
    cout << "请输入新密码：";
    cin >> pwd;
    cout << "请确认新密码：";
    cin >> repwd;
    if (pwd != repwd)
        cout << "对不起，您输入的两次密码不一致,按输入键返回上一层菜单!" << endl;
    else
        cout << "您好，您的密码已修改成功，请牢记并注意账号安全！" << endl; cin.get();
}

void consumer::fetchmoney()
{
    float m;
    char ch;
    do
    {
        cout << endl << "请输入您的取款金额:" << "￥>" << endl;
        cin >> m;
        while (m <= 0)
        {
            cout << "请您输入正确的金额!" << endl;
            cout << "→";
            cin >> m;
        }
        if (money < m)
        {
            cout << "对不起，您的余额不足!" << endl;
        }
        else
        {
            money = money - m;
            cout << endl << "操作成功，请拿好您的钱!" << endl;
        }
        cout << "是否要继续该项操作：(Y/N) "
            << endl;
        cout << "→";
        cin >> ch;
        while (ch != 'n' && ch != 'N' && ch != 'Y' && ch != 'y')//选择错误时判定
        {
            cout << "→";
            cin >> ch;
        }
    } while (ch == 'y' || ch == 'Y');
}

void consumer::savemoney()//存钱函数功能实现
{
    float c;
    char ch;
    do
    {
        cout << endl << "请输入要存入的金额:" << "￥>" << endl;
        cin >> c;
        while (c <= 0)
        {
            cout << "对不起您输入的金额错误,请重新输入!" << endl;
            cout << "→";
            cin >> c;
        }
        money = money + c;
        cout << "操作已成功!" << endl;
        cout << "是否要继续该项操作：(Y/N) " << endl;
        cout << "→";
        cin >> ch;
        while (ch != 'n' && ch != 'N' && ch != 'Y' && ch != 'y')
        {
            cout << "→";
            cin >> ch;
        }
    } while (ch == 'y' || ch == 'Y');
}

int YH::acnum = 0;
void consumer::display()//用户信息界面
{
    system("cls");
    cout << "_____________________________________________" << endl;
    cout << "|                                            |" << endl;
    cout << "|          用户姓名：" << name << endl;
    cout << "|                                            |" << endl;
    cout << "|          帐号：" << ID << endl;
    cout << "|                                            |" << endl;
    cout << "|          余额:" << money << endl;
    cout << "|                                            |" << endl;
    cout << "|          返回（Enter键）                   |" << endl;
    cout << "|                                            |" << endl;
    cout << "|____________________________________________|" << endl;
    cout << "→";
}

void YH::exitYH()//退出系统
{
    cout << endl << "感谢您对银行的支持,欢迎下次光临!" << endl;
    exit(0);
}