银行账号管理系统c++

银行账号管理系统是一个较为复杂的系统，需要考虑到多方面的因素，包括账户管理、账户增删改查、交易记录、利息计算等等。以下是一个简单的银行账号管理系统的C++代码示例：

#include<iostream>
#include<fstream>
#include<cstring>
#include<cstdlib>
#include<iomanip>
using namespace std;

class account
{
    int acno;
    char name[50];
    int deposit;
    char type;
public:
    void create_account(); //创建账户
    void show_account() const; //显示账户
    void modify(); //修改账户
    void dep(int); //存款
    void draw(int); //取款
    void report() const; //账户报告
    int retacno() const; //返回账户号码
    int retdeposit() const; //返回账户余额
    char rettype() const; //返回账户类型
};

void account::create_account()
{
    cout<<"\nEnter The account No. : ";
    cin>>acno;
    cout<<"\n\nEnter The Name of The account Holder : ";
    cin.ignore();
    cin.getline(name,50);
    cout<<"\nEnter Type of The account (C/S) : ";
    cin>>type;
    type=toupper(type);
    cout<<"\nEnter The Initial amount(>=500 for Saving and >=1000 for current ) : ";
    cin>>deposit;
    cout<<"\n\n\nAccount Created..";
}

void account::show_account() const
{
    cout<<"\nAccount No. : "<<acno;
    cout<<"\nAccount Holder Name : ";
    cout<<name;
    cout<<"\nType of Account : "<<type;
    cout<<"\nBalance amount : "<<deposit;
}


void account::modify()
{
    cout<<"\nAccount No. : "<<acno;
    cout<<"\nModify Account Holder Name : ";
    cin.ignore();
    cin.getline(name,50);
    cout<<"\nModify Type of Account : ";
    cin>>type;
    type=toupper(type);
    cout<<"\nModify Balance amount : ";
    cin>>deposit;
}

    
void account::dep(int x)
{
    deposit+=x;
}
    
void account::draw(int x)
{
    deposit-=x;
}
    
void account::report() const
{
    cout<<acno<<setw(10)<<" "<<name<<setw(10)<<" "<<type<<setw(6)<<deposit<<endl;
}

    
int account::retacno() const
{
    return acno;
}

int account::retdeposit() const
{
    return deposit;
}

char account::rettype() const
{
    return type;
}

void write_account(); //写入账户数据至磁盘文件
void display_sp(int); //显示特定账户数据
void modify_account(int); //修改账户数据
void delete_account(int); //删除账户
void display_all(); //显示所有账户数据
void deposit_withdraw(int, int); //存取款处理
void intro(); //显示欢迎信息

int main()
{
    char ch;
    int num;
    intro();
    do
    {
        system("cls");
        cout<<"\n\n\n\tMAIN MENU";
        cout<<"\n\n\t01. NEW ACCOUNT";
        cout<<"\n\n\t02. DEPOSIT AMOUNT";
        cout<<"\n\n\t03. WITHDRAW AMOUNT";
        cout<<"\n\n\t04. BALANCE ENQUIRY";
        cout<<"\n\n\t05. ALL ACCOUNT HOLDER LIST";
        cout<<"\n\n\t06. CLOSE AN ACCOUNT";
        cout<<"\n\n\t07. MODIFY AN ACCOUNT";
        cout<<"\n\n\t08. EXIT";
        cout<<"\n\n\tSelect Your Option (1-8) ";
        cin>>ch;
        system("cls");
        switch(ch)
        {
        case '1':
            write_account();
            break;
        case '2':
            cout<<"\n\n\tEnter The account No. : "; cin>>num;
            deposit_withdraw(num, 1);
            break;
        case '3':
            cout<<"\n\n\tEnter The account No. : "; cin>>num;
            deposit_withdraw(num, 2);
            break;
        case '4':
            cout<<"\n\n\tEnter The account No. : "; cin>>num;
            display_sp(num);
            break;
        case '5':
            display_all();
            break;
        case '6':
            cout<<"\n\n\tEnter The account No. : "; cin>>num;
            delete_account(num);
            break;
        case '7':
            cout<<"\n\n\tEnter The account No. : "; cin>>num;
            modify_account(num);
            break;
        case '8':
            cout<<"\n\n\tThanks for using bank management system";
            break;
        default :cout<<"\a";
        }
        cin.ignore();
        cin.get();
    }while(ch!='8');
    return 0;
}

void write_account()
{
    account ac;
    ofstream outFile;
    outFile.open("account.dat",ios::binary|ios::app);
    ac.create_account();
    outFile.write(reinterpret_cast<char *> (&ac), sizeof(account));
    outFile.close();
}

void display_sp(int n)
{
    account ac;
    bool flag=false;
    ifstream inFile;
    inFile.open("account.dat",ios::binary);
    if(!inFile)
    {
        cout<<"File could not be open !! Press any Key...";
        return;
    }
    cout<<"\nBALANCE DETAILS\n";

        while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
    {
        if(ac.retacno()==n)
        {
            ac.show_account();
            flag=true;
        }
    }
    inFile.close();
    if(flag==false)
        cout<<"\n\nAccount number does not exist";
}


void modify_account(int n)
{
    bool found=false;
    account ac;
    fstream File;
    File.open("account.dat",ios::binary|ios::in|ios::out);
    if(!File)
    {
        cout<<"File could not be open !! Press any Key...";
        return;
    }
    while(!File.eof() && found==false)
    {
        File.read(reinterpret_cast<char *> (&ac), sizeof(account));
        if(ac.retacno()==n)
        {
            ac.show_account();
            cout<<"\n\nEnter The New Details of account"<<endl;
            ac.modify();
            int pos=(-1)*static_cast<int>(sizeof(account));
            File.seekp(pos,ios::cur);
            File.write(reinterpret_cast<char *> (&ac), sizeof(account));
            cout<<"\n\n\t Record Updated";
            found=true;
          }
    }
    File.close();
    if(found==false)
        cout<<"\n\n Record Not Found ";
}

void delete_account(int n)
{
    account ac;
    ifstream inFile;
    ofstream outFile;
    inFile.open("account.dat",ios::binary);
    if(!inFile)
    {
        cout<<"File could not be open !! Press any Key...";
        return;
    }
    outFile.open("Temp.dat",ios::binary);
    inFile.seekg(0,ios::beg);
    while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
    {
        if(ac.retacno()!=n)
        {
            outFile.write(reinterpret_cast<char *> (&ac), sizeof(account));
        }
    }
    inFile.close();
    outFile.close();
    remove("account.dat");
    rename("Temp.dat","account.dat");
    cout<<"\n\n\tRecord Deleted ..";
}

void display_all()
{
    account ac;
    ifstream inFile;
    inFile.open("account.dat",ios::binary);
    if(!inFile)
    {
        cout<<"File could not be open !! Press any Key...";
        return;
    }
    cout<<"\n\n\t\tACCOUNT HOLDER LIST\n\n";
    cout<<"====================================================\n";
    cout<<"A/c no.      NAME           Type  Balance\n";
    cout<<"====================================================\n";
    while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account)))
    {
        ac.report();
    }
    inFile.close();
}

void deposit_withdraw(int n, int option)
{
    int amt;
    bool found=false;
    account ac;
    fstream File;
    File.open("account.dat", ios::binary|ios::in|ios::out);
    if(!File)
    {
        cout<<"File could not be open !! Press any Key...";
        return;
    }
    while(!File.eof() && found==false)
    {
        File.read(reinterpret_cast<char *> (&ac), sizeof(account));
        if(ac.retacno()==n)
        {
            ac.show_account();
            if(option==1)
            {
                cout<<"\n\n\tTO DEPOSITE AMOUNT ";
                cout<<"\n\nEnter The amount to be deposited";
                cin>>amt;
                ac.dep(amt);
            }
            if(option==2)
            {
                cout<<"\n\n\tTO WITHDRAW AMOUNT ";
                cout<<"\n\nEnter The amount to be withdraw";
                cin>>amt;
                int bal=ac.retdeposit()-amt;
                if((bal<500 && ac.rettype()=='S') || (bal<1000 && ac.rettype()=='C'))
                    cout<<"Insufficient balance";
                else
                    ac.draw(amt);
            }
            int pos=(-1)*static_cast<int>(sizeof(ac));
            File.seekp(pos,ios::cur);
            File.write(reinterpret_cast<char *> (&ac), sizeof(account));
            cout<<"\n\n\t Record Updated";
            found=true;
        }
    }
    File.close();
    if(found==false)
        cout<<"\n\n Record Not Found ";
}

void intro()
{
    cout<<"\n\n\n\t  BANK";
    cout<<"\n\n\tMANAGEMENT";
    cout<<"\n\n\t  SYSTEM";
    cout<<"\n\n\n\nMADE BY : your name";
    cout<<"\n\nSCHOOL : your school name";
    cin.get();
}

这个银行账户管理系统包括以下功能：

1. 创建账户
2. 存款
3. 取款
4. 账户余额查询
5. 显示所有账户
6. 删除账户
7. 修改账户信息

你可以根据自己的需要进行修改和扩展。