main.cpp

#include <iostream>
#include <fstream>
#include <cctype>
#include <iomanip>
#include <ctime>
#include <cstdlib>

using namespace std;
class account
{
    int accountnumber;
    char name[50];
    int deposit;
    char type;

public:
    void create_account();
    void show_account();
    void modify_account();
    void deposit_funds(int);
    void draw_funds(int);
    void get_report();
    int get_accountnumber() const;
    int get_funds() const;
    char get_accounttype() const;
};

void account::create_account()
{
    accountnumber = rand();
    std::cout << "\nThe account Number is : " << accountnumber;
    std::cout << "\nEnter The Name of The account Holder : ";
    std::cin.ignore();
    std::cin.getline(name, 50);
    std::cout << "\nEnter account type (enter s - saving or c - credit): ";
    std::cin >> type;
    type = toupper(type);
    std::cout << "\nEnter The Initial amount(500 or more for Saving and 1000 or more for current ): ";
    std::cin >> deposit;
    std::cout << "\n\n\nAccount Created Successfully...";
}

void account::show_account()
{
    cout << "\nAccount Number: " << accountnumber;
    cout << "\nAccount Holder Name: " << name;
    cout << "\nType of Account: " << type;
    cout << "\nBalance amount: " << deposit;
}

void account::modify_account()
{
    cout << "\nAccount Number: " << accountnumber;
    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::deposit_funds(int x) {
    deposit += x;
}

void account::draw_funds(int x)
{
    deposit -= x;
}

void account::get_report()
{
    cout << accountnumber << setw(10) << " " << name << setw(10) << " " << type << setw(6) << deposit << endl;
}

int account::get_accountnumber() const
{
    return accountnumber;
}

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

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

void write_account();
void display_sp(int);
void modify_account(int);
void delete_account(int);
void display_all();
void deposit_withdraw(int, int);

/// Main file
int main()
{
    srand(time(nullptr));
    char opt;
    int num;
    for (;;)
    {

        cout << "\t\t===== University of Ruhuna  \n\t\t\tBank Management System=====\n";
        cout << "\n\t\tPress 1 to Create New Account";
        cout << "\n\t\tPress 2 to Deposit Funds";
        cout << "\n\t\tPress 3 to Withdraw Funds";
        cout << "\n\t\tPress 4 to Check Balance";
        cout << "\n\t\tPress 5 to View All Account Holder";
        cout << "\n\t\tPress 6 to Close an Account";
        cout << "\n\t\tPress 7 to Modify an Account";
        cout << "\n\t\tPress 8 to Exit the Program";
        cout << "\n\t\tOption: ";
        cin >> opt;
        system("cls");
        switch (opt)
        {
            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 University of Ruhuna Bank Management System";
                break;
            default:
                cout << "Invalid Option\n";
        }
        cin.ignore();
        cin.get();
        if (opt == '8')
            break;
    }
    return 0;
}


/// functions
///*********************************************************************************************
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.get_accountnumber() == n)
        {
            ac.show_account();
            flag = true;
        }
    }
    inFile.close();
    if (!flag)
        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)
    {
        File.read(reinterpret_cast<char *>(&ac), sizeof(account));
        if (ac.get_accountnumber() == n)
        {
            ac.show_account();
            cout << "\n\nEnter The New Details of account: " << endl;
            ac.modify_account();
            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)
        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.get_accountnumber() != 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()
{
    int bankPassword = 12345, enteredPassword;
    cout << "Enter the BANK PASSWORD: \n";
    cin >> enteredPassword;
    if (enteredPassword == bankPassword)
    {
        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 << "Account No.      Name           Type      Balance\n";
        cout << "====================================================\n";
        while (inFile.read(reinterpret_cast<char *>(&ac), sizeof(account)))
        {
            ac.get_report();
        }
        inFile.close();

    }
    else {
        cout << "Please enter the correct password.\n";
    }
}

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)
    {
        File.read(reinterpret_cast<char *>(&ac), sizeof(account));
        if (ac.get_accountnumber() == n)
        {
            ac.show_account();
            if (option == 1)
            {
                cout << "\n\n\tTO DEPOSIT AMOUNT ";
                cout << "\n\nEnter The amount to be deposited: ";
                cin >> amt;
                ac.deposit_funds(amt);
            }
            if (option == 2)
            {
                cout << "\n\n\tTO WITHDRAW AMOUNT ";
                cout << "\n\nEnter The amount to be withdraw: ";
                cin >> amt;
                int bal = ac.get_funds() - amt;
                if ((bal < 500 && ac.get_accounttype() == 'S') || (bal < 1000 && ac.get_accounttype() == 'C'))
                    cout << "Insufficient balance";
                else
                    ac.draw_funds(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)
        cout << "\n\n Record Not Found ";
}