Bank Simulation Program银行管理系统C++ :)

设计并实现简单的银行存取款系统，系统主界面包括登录和注册两个选项，选择登录，提示用户输入银行帐号和密码，验证通过后进入主界面，主界面包括：存款、取款、查询余额、历史记录、修改密码等功能。注册功能让用户输入账号和密码，在注册时要验证账号是否已经存在。所有数据能够保存在文件中，退出系统后再次运行系统，之前注册的用户和存款信息都存在。

#include <iostream>
#include <fstream>
#include <queue>
#include <stdlib.h>
using namespace std;
struct user;
typedef user T;
queue <T> uu;
int count=0;
struct user
{
    string id;
    string pass;
    int n;
    double *money;
    user() {}
    user(string id,string pass,int n,double *money):id(id),pass(pass),n(n),money(money) {}
};

int gongshow();
int gong(string newid);
int save(string newid, string newpass);
int setid(string newid,string newpass);

int main()
{
    system("color 0A");
    while(1)
    {
        int m;
        string newid,newpass;
        cout << "\t\t\t    *************************" << endl;
        cout << "\t\t\t    *Bank Simulation Program*" << endl;
        cout << "\t\t\t    *************************" << endl;
        cout << "\t\t\t    *                       *" << endl;
        cout << "\t\t\t    *        1.LOG IN       *" << endl;
        cout << "\t\t\t    *        2.ENROLL       *" << endl;
        cout << "\t\t\t    *        3.ESC          *" << endl;
        cout << "\t\t\t    *                       *" << endl;
        cout << "\t\t\t    *************************" << endl<<endl;
        cout << "\t\t\t Please enter the serial number:";
        cin  >> m;
        if(m==3)
            return 0;
        system("cls");
        cout << "\t\t\t    *************************" << endl;
        cout << "\t\t\t    *Bank Simulation Program*" << endl;
        cout << "\t\t\t    *************************" << endl<<endl;
        cout << "\t\t\t    ID:";
        cin  >> newid;
        cout << "\t\t\t    PASSWORD:";
        cin  >> newpass;
        int x=save(newid,newpass);// id 1 password 0 no_id 2
        if(m==1)
            if(x==1)
            {
                cout << "\t\t\t    LOGIN SUCCESSFUL";
                system ("pause>nul");
                system("cls");
                while(1)
                {
                    if(gong(newid)==0) break;
                    int x=save(newid,newpass);
                    system ("pause>nul");
                    system("cls");
                }
            }
            else if(x==2)
            {
                cout << "\t\t\t    ACCOUNT DOS'T EXIST";
                system ("pause>nul");
                system("cls");
            }
            else
            {
                cout << "\t\t\t    WRONG PASSWORD";
                system ("pause>nul");
                system("cls");
            }
        else if(m==2)
        {
            if(x==2)
            {
                if(setid(newid,newpass))
                {
                    cout << "\t\t\t    ENROLL SUCCESS";
                    while(1)
                    {
                        while(!uu.empty()) uu.pop();
                        int x=save(newid,newpass);
                        system ("pause>nul");
                        system("cls");
                        if(gong(newid)==0) break;
                    }
                }
                else
                {
                    cout << "\t\t\t    ENROLL FAILURE";
                    system ("pause>nul");
                    system("cls");

                }
            }
            else if(x==1)
            {
                cout << "\t\t\t    ACCOUNT ALREADY EXISTS";
                system ("pause>nul");
                system("cls");

            }
            system("cls");
        }
    }
    return 0;
}

int gongshow()
{
    cout << "\t\t\t    *************************" << endl;
    cout << "\t\t\t    *Bank Simulation Program*" << endl;
    cout << "\t\t\t    *************************" << endl;
    cout << "\t\t\t    *                       *" << endl;
    cout << "\t\t\t    *     1.DPOSIT          *" << endl;
    cout << "\t\t\t    *     2.WITHDRAWALS     *" << endl;
    cout << "\t\t\t    *     3.CHECK BALANCES  *" << endl;
    cout << "\t\t\t    *     4.HISTORY RECORD  *" << endl;
    cout << "\t\t\t    *     5.CHANGE PASSWORD *" << endl;
    cout << "\t\t\t    *     6.ESC             *" << endl;
    cout << "\t\t\t    *                       *" << endl;
    cout << "\t\t\t    *************************" << endl;
    cout << endl << "\t\t\t Please enter the serial number:";
    int n;
    cin >>n;
    return n;
}

int gong(string newid)
{

    int n=gongshow();
    if(n==2||n==1||n==5)
    {
        fstream f("ios.txt",ios::out);
        if(n==1)
        {
            double n=0;
            cout << "\t\t\t    Enter deposit amount:";
            cin >> n;
            while(!uu.empty())
            {
                if(uu.front().id==newid)
                {
                    f<<uu.front().id<<' '<<uu.front().pass<<' '<<uu.front().n+1<<' ';
                    for(int i=0; i<uu.front().n; i++)
                    {
                        f<< uu.front().money[i]<<' ';
                    }
                    f<< uu.front().money[uu.front().n-1]+n<< endl;
                    cout << "\t\t\t    Deposit has been successful";
                }
                else
                {
                    f<<uu.front().id<<' '<<uu.front().pass<<' '<<uu.front().n<<' ';
                    for(int i=0; i<uu.front().n; i++)
                    {
                        f<< uu.front().money[i]<<' ';
                    }
                    f<<endl;
                }
                uu.pop();
                count--;
                if(count==1)
                    uu.pop();
            }
        }
        if(n==2)
        {
            double n=0;
            cout << "\t\t\t    Enter the withdrawal amount:";
            cin >> n;
            while(!uu.empty())
            {
                if(uu.front().id==newid&&uu.front().money[uu.front().n-1]-n>=0)
                {
                    f<<uu.front().id<<' '<<uu.front().pass<<' '<<uu.front().n+1<<' ';
                    for(int i=0; i<uu.front().n; i++)
                    {
                        f<< uu.front().money[i]<<' ';
                    }
                    f<< uu.front().money[uu.front().n-1]-n<< endl;
                    f<< endl;
                    cout << "\t\t\t    Withdrawals success";
                }
                else if(uu.front().id!=newid)
                {
                    f<<uu.front().id<<' '<<uu.front().pass<<' '<<uu.front().n<<' ';
                    for(int i=0; i<uu.front().n; i++)
                    {
                        f<< uu.front().money[i]<<' ';
                    }
                    f<<endl;
                }
                else if(uu.front().id==newid&&uu.front().money[uu.front().n-1]-n<0)
                {
                    f<<uu.front().id<<' '<<uu.front().pass<<' '<<uu.front().n<<' ';
                    for(int i=0; i<uu.front().n; i++)
                    {
                        f<< uu.front().money[i]<<' ';
                    }
                    f<<endl;
                    cout << "\t\t\t    INSUFFICIENT BALANCE\n";
                }
                uu.pop();
                count--;
                if(count==1)
                    uu.pop();
            }

        }
        else if(n==5)
        {
            string newpass;
            cout << "\t\t\t    Please enter a new password:";
            cin >> newpass;
            while(!uu.empty())
            {
                if(uu.front().id==newid)
                {
                    f<<uu.front().id<<' '<<newpass<<' '<<uu.front().n<<' ';
                    for(int i=0; i<uu.front().n; i++)
                    {
                        f<< uu.front().money[i]<<' ';
                    }
                    f<< uu.front().money[uu.front().n-1]<< endl;
                }
                uu.pop();
                count--;
                if(count==1)
                    uu.pop();
            }
            cout << "\t\t\t    PASSWORD RESET COMPLETE\n";
        }
        f.close();
    }
    else if(n==3)
    {
        while(!uu.empty())
        {
            if(uu.front().id==newid)
            {
                cout << "\t\t\t    BALANCES:" << uu.front().money[uu.front().n-1]<<endl;
            }
            uu.pop();
        }
    }
    else if(n==4)
    {
        while(!uu.empty())
        {
            if(uu.front().id==newid)
            {
                cout<<"\t\t\t    ID:"<<uu.front().id<<endl;
                for(int i=1; i<uu.front().n; i++)
                {
                    cout<<"\t\t\t    ";
                    double difference=uu.front().money[i]-uu.front().money[i-1];
                    if(difference>0)
                        cout<<'+';
                    cout<<difference<<endl;
                }
                if(uu.front().n==1) cout<<"\t\t\t    NO RECORD";
            }
            uu.pop();
        }
    }
    else if(n==6)
    {
        system("cls");
        return 0;
    }
    return 1;
}

int save(string newid, string newpass)
{
    count=0;
    int flog=2;
    fstream fi;
    fi.open("ios.txt",ios::in);
    if(!fi)
    {
        fi.open("ios.txt",ios::out);
        fi.close();
        fi.open("ios.txt",ios::in);
    }
    while(!fi.eof())
    {
        double *money=new double;
        user a;
        fi >> a.id >> a.pass >> a.n;
        if(a.id==newid)
            if(a.pass==newpass)
                flog=1;
            else
                return 0;
        for(int j =0; j<a.n; j++)
        {
            fi >> money[j];
        }
        a.money=money;
        uu.push(a);
        count++;
    }
    fi.close();
    return flog;
}

int setid(string newid,string newpass)
{
    fstream fi("ios.txt",ios::app|ios::out);
    int n=1;
    double x=0.0;
    fi<< newid << ' ' << newpass << ' '  << n << ' ' << x <<endl ;
    fi.close();
    return 1;
}

到这里就写完了 :) .