C++语言基础 例程 应用系统开发：银行储蓄系统

贺老师的教学链接 本课讲解

说明：
（1）下面的代码，只演示了利用链表作为存储结构的可选处理方法，本讲提到的其他方面的拓展，请感兴趣做下去的同学自行使用相关技术组合起来，形成一个完整的系统。
（2）运行程序，登录用户名和密码，请阅读程序，从程序中找出。建议建立多文件项目，将代码拷贝到IDE中看。
（3）本程序由我的2011级学生刘镇参加企业组织的实训中完成，原文在：点击打开链接

Record.h

#ifndef HEADER_RECORD                     //条件编译
#define HEADER_RECORD
#include <string>
using namespace std;

class Record
{
private:
    int number;
    string userName;
    string passWord;
    double balance;
    int flag;
public:
    Record();
    void set_number(int number);
    void set_userName(string userName);
    void set_passWord(string passWord);
    void set_balance(double balance);
    void set_flag(int flag);
    int get_number();
    string get_userName();
    string get_passWord();
    double get_balance();
    int get_flag();
    void display_Record();
};
#endif

Record.cpp

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

Record::Record()
{
    this->number = 0;
    this->userName = "";
    this->passWord = "";
    this->balance = 0;
    this->flag = -1;
}

void Record::set_number(int number)
{
    this->number = number;
}

void Record::set_userName(string userName)
{
    this->userName = userName;
}

void Record::set_passWord(string passWord)
{
    this->passWord = passWord;
}

void Record::set_balance(double balance)
{
    this->balance = balance;
}

void Record::set_flag(int flag)
{
    this->flag = flag;
}

int Record::get_number()
{
    return this->number;
}

string Record::get_userName()
{
    return this->userName;
}

string Record::get_passWord()
{
    return this->passWord;
}

double Record::get_balance()
{
    return this->balance;
}

int Record::get_flag()
{
    return this->flag;
}

void Record::display_Record()                         //用于显示打印信息
{
    cout << "打印用户信息中..." << endl;

    cout << "+---------------------------------------+" << endl;
    cout << "|" << "账号" << '\t' << "|" << "户名" << '\t' << "|" << "密码" << '\t' << "|" << "余额" << '\t' << "|" << "状态" << '\t' << "|"<< endl;
    cout << "|----------------------------------------" << endl;
    cout << "|" << this->number << '\t' << "|" << this->userName << '\t' << "|" << this->passWord << '\t' << "|" << this->balance << '\t' << "|" ;

    if(this->flag == 1)
    {
        cout << "正常";
    }
    else
    {
        cout << "销户";
    }

    cout << '\t' << "|" << endl;
    cout << "|---------------------------------------+" << endl;
}

Node.h

#ifndef HEADER_NODE
#define HEADER_NODE
#include "Record.h"
using namespace std;

class Node
{
private:
    Record * record;
    Node * next;
public:
    Node();
    ~Node();
    void set_record(Record * record);
    void set_next(Node * next);
    Record * get_record();
    Node  * get_next();
    void display_Node();
};
#endif

Node.cpp

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

Node::Node()
{
    this->record = NULL;
    this->next = NULL;
}
Node::~Node()
{
    delete this->record;
    this->record = NULL;
    this->next = NULL;
}

void Node::set_record(Record * record)
{
    this->record = record;
}

void Node::set_next(Node * next)
{
    this->next = next;
}

Record * Node::get_record()
{
    return this->record;
}

Node * Node::get_next()
{
    return this->next;
}

void Node::display_Node()
{
    cout << "打印用户信息中..." << endl;

    if(this->record != NULL)                              //当出现空链表时执行
    {
        Record * r = this->record;
        r->display_Record();
    }
    else
    {
        cout << "记录为空..." << endl;
    }

    cout << "Next * : " << this->next << endl;
    cout << "结点结束..." << endl;
}

LinkList.h

#ifndef HEADER_LINKLIST
#define HEADER_LINKLIST
#include "Node.h"
using namespace std;

class Linklist
{
private:
    Node * head;
    int len;
public:
    Linklist();
    ~Linklist();
    void set_head(Node * head);
    void set_len(int len);
    Node * get_head();
    int get_len();

    Node * make_node(Record * record);
    void insert_node(Node * node);
    Node * find_node(int number);
    void display_Linklist();
};
#endif

LinkList.cpp

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

Linklist::Linklist()
{
    this->head = NULL;
    this->len = 0;
}

Linklist::~Linklist()
{
    Node * p, * q;
    p = this->head;

    while(p != NULL)
    {
        q = p;
        p = p->get_next();
        delete q;
    }
    this->head = NULL;
    this->len = 0;
}

void Linklist::set_head(Node * head)
{
    this->head = head;
}

void Linklist::set_len(int len)
{
    this->len = len;
}

Node * Linklist::get_head()
{
    return this->head;
}

int Linklist::get_len()
{
    return this->len;
}

Node * Linklist::make_node(Record * record)
{
    Node * node = new Node();
    node->set_record(record);
    node->set_next(NULL);

    return node;
}

void Linklist::insert_node(Node * node)
{
    Node * p = this->head;

    if(p == NULL)
    {
        this->head = node;
        this->len++;

        return;
    }

    while(p->get_next() != NULL)
    {
        p = p->get_next();
    }

    p->set_next(node);
    this->len++;

    return;
}

Node * Linklist::find_node(int number)
{
    Node * p = this->head;

    while(p != NULL)
    {
        Record * r = p->get_record();

        if(r->get_number() == number)
        {
            return p;                    //返回找到的结点
        }
        else
        {
            p = p->get_next();
        }
    }

    return p;                     //return NULL;
}

void Linklist::display_Linklist()
{
    cout << "打印用户信息中..." << endl;

    Node * p = this->head;

    if(p == NULL)
    {
        cout << "链表为空..." << endl;
        cout << "链长: " << this->len << endl;
        cout << "记录结束..." << endl;

        return;
    }

    while(p != NULL)
    {
        p->display_Node();
        p = p->get_next();
    }

    cout << "链长: " << this->len << endl;
    cout << "链表结束..." << endl;
}

Bank.h

#ifndef HEADER_BANK
#define HEADER_BANK
#include "Linklist.h"
using namespace std;

class Bank
{
private:
    Linklist * list;
    int account_number;
public:
    Bank();
    ~Bank();

    void set_list(Linklist * list);
    Linklist * get_list();
    Linklist * make_linklist();
    Record * make_record(string username, string password, double balance);
    int creat_number();
    int get_number();
    string get_userName();
    string get_passWord();
    double get_balance();
    Record * find_record(int account_number);

    void open_account();
    void close_account();
    void find_account();
    void deposit();
    void withdraw();
    void transfer_account();
};
#endif

Bank.cpp

#include <conio.h>
#include "Bank.h"
#include <iostream>
#include <cstdio>
using namespace std;

Bank::Bank()
{
    this->list = this->make_linklist();
    this->account_number = 10000;          //未开户
}

Bank::~Bank()                         //将调用所有类的析构函数
{
    delete this->list;
    this->list = NULL;
}

void Bank::set_list(Linklist *list)
{
    this->list = list;
}

Linklist * Bank::get_list()
{
    return this->list;
}

Linklist * Bank::make_linklist()
{
    return new Linklist();
}

Record * Bank::make_record(string username, string password, double balance)
{
    Record * r = new Record();
    int number = this->creat_number();
    r->set_number(number);
    r->set_passWord(password);
    r->set_userName(username);
    r->set_balance(balance);
    r->set_flag(1);

    return r;
}

int Bank::creat_number()
{
    return this->account_number = this->account_number + 1;
}

int Bank::get_number()
{
    int number;

    cout << "请输入账号..." << endl;
    cin >> number;
    cout << "账号: " << number << endl;

    return number;
}

string Bank::get_userName()
{
    string username;

    cout << "请输入户名..." << endl;
    cin >> username;
    cout << "户名: " << username << endl;

    return username;
}

string Bank::get_passWord()
{
    string password;

    cout << "请输入密码..." << endl;
    cin >> password;
    cout << "密码: " << password << endl;

    return password;
}

double Bank::get_balance()
{
    double balance;

    cout << "请输入金额..." << endl;
    cin >> balance;
    cout << "金额：" << balance << endl;

    return balance;
}

Record * Bank::find_record(int account_number)
{
    Node * n = this->list->find_node(account_number);

    if(n != NULL)
    {
        return n->get_record();
    }

    return NULL;
}

//开户功能：
void Bank::open_account()
{
    //  获取用户输入的账户信息

    string userName = this->get_userName();
    string passWord = this->get_passWord();
    double balance = this->get_balance();

    //  使用输入数据创建Record对象
    Record * r  = this->make_record(userName, passWord, balance);

    //  创建Node结点，封装Record对象
    Node * n = this->list->make_node(r);

    //  将Node结点插入到Linklist链表
    this->list->insert_node(n);

    //显示账户信息
    r->display_Record();

    cout << "开户成功！按任意键退出..." << endl;
    getch();

    return;
}

//销户功能：
void Bank::close_account()
{
    // 获取销户账号
    int Number = this->get_number();

    // 查找账户
    Record * back_record = this->find_record(Number);

    if(back_record == NULL)
    {
        cout << "查无此帐户！按任意键退出..."  << endl;
        getchar();

        return;
    }

    //获取账户密码，判断密码是否正确
    string passWord = this->get_passWord();

    if(passWord != back_record->get_passWord())
    {
        cout << "密码不正确！按任意键退出..." << endl;
        getchar();

        return;
    }

    //判断账户状态
    if(back_record->get_flag() == 0)
    {
        cout << "该帐户已经销户，不能再次销户！" << endl;
        getchar();

        return;
    }

    //获取用户输入的选择信息，确认是否销户
    string userAnswer;

    cout << "确认销户？ [1:销户| 其他:不销户] " << endl;
    cin >> userAnswer;

    //销户
    if(userAnswer == "1")
    {
        back_record->set_flag(0);
        back_record->set_balance(0);

        back_record->display_Record();

        cout << "销户成功！按任意键退出..." << endl;
        getchar();

        return;
    }

    cout << "销户用户取消销户！" << endl;

    return;
}

//查询功能：
void Bank::find_account()
{
    // 获取查询账号
    int Number = this->get_number();

    // 查找账户
    Record * back_record = this->find_record(Number);

    if(back_record == NULL)
    {
        cout << "查无此帐户！按任意键退出..."  << endl;
        getch();

        return;
    }

    //获取账户密码，判断密码是否正确
    string passWord = this->get_passWord();

    if(passWord != back_record->get_passWord())
    {
        cout << "密码不正确！按任意键退出..." << endl;
        getch();

        return;
    }

    //显示查询到的用户信息
    back_record->display_Record();

    cout << "查询成功！按任意键退出..." << endl;
    getch();

    return;
}

//存款功能：
void Bank::deposit()
{
    //获取存款账号
    int Number = this->get_number();

    //查找账号
    Record * back_record = this->find_record(Number);

    //判断用户是否存在
    if(back_record == NULL)
    {
        cout << "查无此帐户！按任意键退出..."  << endl;
        getch();

        return;
    }

    //显示账户信息
    back_record->display_Record();

    //判断账户是否销户
    if(back_record->get_flag() == 0)
    {
        cout << "该帐户已经销户！按任意键退出..." << endl;
        getch();

        return;
    }

    double cash = 0;

    cout << "输入存款金额: " << endl;
    cin >> cash;
    cout << "存款金额为：" << cash << endl;

    cash = back_record->get_balance() + cash;
    back_record->set_balance(cash);

    //显示账户信息
    back_record->display_Record();

    cout << "存款结束! 按任意键退出..." << endl;
    getch();

    return;
}

//取款功能：
void Bank::withdraw()
{
    // 获取取款账号
    int Number = this->get_number();

    // 查找账户
    Record * back_record = this->find_record(Number);

    if(back_record == NULL)
    {
        cout << "查无此帐户！按任意键退出..."  << endl;
        getch();

        return;
    }

    //获取账户密码，判断密码是否正确
    string passWord = this->get_passWord();

    if(passWord != back_record->get_passWord())
    {
        cout << "密码不正确！按任意键退出..." << endl;
        getch();

        return;
    }

    // 确定用户账户状态
    if(back_record->get_flag() == 0)
    {
        cout << "该帐户已经销户！按任意键退出..." << endl;
        getch();

        return;
    }

    double cash = 0;

    cout << "请输入取款金额：" << endl;
    cin >> cash;

    if(cash > back_record->get_balance())
    {
        cout << "账户余额不足！按任意键退出..." << endl;
        getch();

        return;
    }

    cash = back_record->get_balance() - cash;
    back_record->set_balance(cash);

    //显示账户信息
    back_record->display_Record();

    cout << "取款结束! 按任意键退出..." << endl;
    getch();

    return;
}

//转账功能：
void Bank::transfer_account()
{
    // 获取转入账号
    int number;

    cout << "请输入转出账号：" << endl;
    cin >> number;

    // 查找账号
    Record * back_record = this->find_record(number);

    if(back_record == NULL)
    {
        cout << "查无此帐户！按任意键退出..."  << endl;
        getch();

        return;
    }

    //获取账户密码，判断密码是否正确
    string passWord;

    cout << "请输入账户密码：" << endl;
    cin >> passWord;

    if(passWord != back_record->get_passWord())
    {
        cout << "密码不正确！按任意键退出..." << endl;
        getch();

        return;
    }

    // 确定用户账户状态
    if(back_record->get_flag() == 0)
    {
        cout << "该帐户已经销户！按任意键退出..." << endl;
        getch();

        return;
    }

    //获取转账账号
    int transfer_number;

    cout << "请输入转入账号：" << endl;
    cin >> transfer_number;

    //查找转账账户
    Record * transfer_record = this->find_record(transfer_number);

    if(back_record == NULL)
    {
        cout << "查无此帐户！按任意键退出..."  << endl;
        getch();

        return;
    }

    // 确定用户账户状态
    if(back_record->get_flag() == 0)
    {
        cout << "该帐户已经销户！按任意键退出..." << endl;
        getch();

        return;
    }

    //获取转账金额
    double cash = 0;

    cout << "请输入转入金额：" << endl;
    cin >> cash;

    //判断转账金额是否合法
    if(cash > back_record->get_balance())
    {
        cout << "账户余额不足！按任意键退出..." << endl;
        getch();

        return;
    }

    //资金转账
    transfer_record->set_balance(transfer_record->get_balance() + cash);
    back_record->set_balance(back_record->get_balance() - cash);

    //显示当前帐户信息及转账账户信息
    cout << "转出帐户信息：" << endl;
    back_record->display_Record();

    cout << "转入账户信息：" << endl;
    transfer_record->display_Record();

    //转账结束
    cout << "转账结束! 按任意键退出..." << endl;
    getch();

    return;
}

Main.cpp

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

void welcome();
void login(Bank * bank);
void mainmenu(Bank * bank);

int main()
{
    Bank * bank = new Bank();

    welcome();

    login(bank);

    return 0;
}

void welcome()
{
    cout << "+--------------------------------------+" << endl;
    cout << "|                                      |" << endl;
    cout << "|         欢迎使用储蓄综合业务平台    |" << endl;
    cout << "|                                      |" << endl;
    cout << "+--------------------------------------+" << endl;
}

void mainmenu(Bank * bank)
{
    int choice = -1;

    do
    {
        cout << endl;
        cout << "+---------------------------------+" << endl;
        cout << "| 开户请按1        取款请按5  |" << endl;
        cout << "| 销户请按2        转账请按6  |" << endl;
        cout << "| 查询请按3        退出请按0  |" << endl;
        cout << "| 存款请按4                     |" << endl;
        cout << "+---------------------------------+" << endl;

        cout << "请输入您的选择: " << endl;
        cin >> choice;

        switch(choice)
        {
        case 0:
            exit(0);
        case 1:
            bank->open_account();
            break;
        case 2:
            bank->close_account();
            break;
        case 3:
            bank->find_account();
            break;
        case 4:
            bank->deposit();
            break;
        case 5:
            bank->withdraw();
            break;
        case 6:
            bank->transfer_account();
            break;
        default:
            cout << "无效选项！" << endl;
            break;
        }
    }
    while(true);

}

void login(Bank * bank)
{
    string admin_userName;
    string admin_passWord;

    for(int i = 1; i <= 3; ++i)
    {
        cout << endl;

        cout << "请输入您用的用户名: " << endl;
        cin >> admin_userName;

        cout << "请输入您的密码: " << endl;
        cin >> admin_passWord;

        if((admin_userName == "admin") && (admin_passWord == "admin"))
        {
            mainmenu(bank);
        }

        else
        {
            if(i < 2)
            {
                cout << "用户名或密码输入错误，请重新输入！" << endl;
            }

            else
            {
                cout << "连续输错用户名或密码，退出系统！" << endl;
            }
        }
    }
}