Bank Management System in C++ | Simple Project with Source Code

 Bank Management System in C++: A Complete Guide

Introduction

A Bank Management System is a software application that helps in managing various banking operations such as account creation, deposit, withdrawal, balance inquiry, and more. In this post, we will develop a Bank Management System using C++ with file handling to store account details.

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Features of the Bank Management System

Our system will include the following features:

1. Create a New Account

2. Deposit Money

3. Withdraw Money

4. Check Balance

5. View Account Details

6. Modify Account Information

7. Delete an Account

8. Exit the Program

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Implementation of Bank Management System in C++

The system will use Object-Oriented Programming (OOP) principles like classes and objects. The file handling feature will be used to store account details permanently.

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Code for the Bank Management System

Here is the complete code for the Bank Management System in C++:

cpp
#include <iostream>

#include <fstream>

#include<iomanip>
using namespace std; 
class BankAccount { 
int accountNumber;
char name[50];
double balance; 
public: 
void createAccount();
void showAccount() const;
void deposit(double amount);
void withdraw(double amount);
int getAccountNumber() 
const {
return accountNumber; 
}
    double getBalance() 
const {
return balance; 
}
void updateAccount();
 };

// Function to create a new account 
void BankAccount::createAccount() {
 cout << "\nEnter Account Number: ";
 cin >> accountNumber;
 cout << "Enter Account Holder Name: ";
 cin.ignore();
 cin.getline(name, 50);
 cout << "Enter Initial Deposit: "; 
 cin >> balance;
    cout << "\nAccount Created Successfully!\n"; 
}

// Function to display account details 
void BankAccount::showAccount() const 
{ 
 cout << "\nAccount Number: " << accountNumber;
    cout << "\nAccount Holder: " << name;
 cout << "\nBalance: $" << fixed << setprecision(2) << balance << endl;
 }

// Function to deposit money 
void BankAccount::deposit(double amount)
 {
 balance += amount; 
}

// Function to withdraw money 
void BankAccount::withdraw(double amount) { 
if (amount > balance) {
        cout << "\nInsufficient Balance!\n"; 
 }
else {
        balance -= amount;
        cout << "\nWithdrawal Successful!\n"; 
 } 
} 
// Function to update account details
void BankAccount::updateAccount() {
    cout << "\nEnter New Account Holder Name: "; 
 cin.ignore();
 cin.getline(name, 50);
    cout << "Enter New Balance: ";
 cin >> balance;
 } 
// Function to write account details to a file
void saveAccount(BankAccount &acc) {
    ofstream outFile("accounts.dat", 
ios::binary | ios::app);
 outFile.write(reinterpret_cast<char *>(&acc), 
sizeof(BankAccount));
 outFile.close(); 
}

// Function to display all accounts
void displayAllAccounts() {
    BankAccount acc;
ifstream inFile("accounts.dat", 
ios::binary);
    if (!inFile) { 
 cout << "\nNo Accounts Found!\n"; 
return; 
 } 
 cout << "\n----- Account List -----\n";
while (inFile.read(reinterpret_cast<char *>(&acc), sizeof(BankAccount))) {
 acc.showAccount();
        cout << "----------------------\n";
 }
 inFile.close();
 } 
// Function to search an account
void searchAccount(int accNum) {
 BankAccount acc;
ifstream inFile("accounts.dat", ios::binary);
bool found = false;
while (inFile.read(reinterpret_cast<char *>(&acc), sizeof(BankAccount))) {
if (acc.getAccountNumber() == accNum) {
            acc.showAccount(); 
 found = true;
break;
 }
 }
    inFile.close();
if (!found) {
        cout << "\nAccount Not Found!\n";
 }
} 
// Function to update account details
void updateAccount(int accNum) {
    fstream file("accounts.dat", ios::binary | ios::in | ios::out);
    BankAccount acc;
bool found = false;
while (!file.eof() && file.read(reinterpret_cast<char *>(&acc), sizeof(BankAccount))) {
        if
 (acc.getAccountNumber() == accNum) {
 acc.updateAccount(); 
 file.seekp(-static_cast<int>(sizeof(BankAccount)), ios::cur);
 file.write(reinterpret_cast<char *>(&acc), sizeof(BankAccount));
 found = true;
            cout << "\nAccount Updated Successfully!\n";
break; 
 }
    }
    file.close();
if (!found) {
        cout << "\nAccount Not Found!\n"; 
 }
} 
// Function to delete an account
void deleteAccount(int accNum) { 
 BankAccount acc;
ifstream inFile("accounts.dat", ios::binary);
ofstream outFile("temp.dat", ios::binary);
bool found = false;
while (inFile.read(reinterpret_cast<char *>(&acc), sizeof(BankAccount))) {
if (acc.getAccountNumber() == accNum) {
            found = true;
 }
else {
            outFile.write(reinterpret_cast<char *>(&acc),
sizeof(BankAccount));
        }
    }
    inFile.close();
 outFile.close(); 
remove("accounts.dat"); 
rename("temp.dat", "accounts.dat"); 
if (found) {
 cout << "\nAccount Deleted Successfully!\n";
    } 
else { 
 cout << "\nAccount Not Found!\n"; 
 } 
} 
// Main Function 
int main() {
int choice, accNum;
 BankAccount acc;
    double amount; 
do {
 cout << "\n------ Bank Management System ------\n";
 cout << "1. Create Account\n"; 
 cout << "2. View All Accounts\n"; 
 cout << "3. Search Account\n";
 cout << "4. Deposit Money\n";
 cout << "5. Withdraw Money\n"; 
 cout << "6. Update Account\n"; 
 cout << "7. Delete Account\n";
 cout << "8. Exit\n"; 
 cout << "Enter Your Choice: ";
 cin >> choice;
switch (choice)
 { 
case 1:
                acc.createAccount();
                saveAccount(acc);
                break; 
case 2:
                displayAllAccounts();
                break; 
case 3:
                cout << "\nEnter Account Number to Search: ";
                cin >> accNum;
                searchAccount(accNum);
                break; 
case 4:
                cout << "\nEnter Account Number: ";
                cin >> accNum;
                cout << "Enter Amount to Deposit: ";
                cin >> amount;
                updateAccount(accNum);
                break;
case 5:
                cout << "\nEnter Account Number: ";
                cin >> accNum;
                cout << "Enter Amount to Withdraw: ";
                cin >> amount;
                updateAccount(accNum);
                break;
            case 6:
                cout << "\nEnter Account Number to Update: ";
                cin >> accNum;
                updateAccount(accNum);
                break; 
case 7:
                cout << "\nEnter Account Number to Delete: ";
                cin >> accNum;
                deleteAccount(accNum);
break; 
case 8:
 cout << "\nThank you for using the Bank Management System!\n";
                break;
            default:
 cout << "\nInvalid Choice! Try Again.\n";
        }
    } while 
(choice != 8);
return 0;
 }

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Explanation of the Code

1. Class BankAccount

   • Stores account details.

   • Provides functions to create an account, show account details, deposit, withdraw, and update account information.

2. File Handling

   • saveAccount() stores account details in a file.

   • displayAllAccounts() reads and displays all accounts from the file.

   • searchAccount() searches for a specific account.

   • updateAccount() modifies an existing account.

   • deleteAccount() removes an account.

3. Menu-Driven System

   • Users can interact with the program through a menu.

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Conclusion

This Bank Management System in C++ demonstrates Object-Oriented Programming and File Handling. You can enhance it by adding password protection, interest calculation, or database integration.

Would you like any modifications or additional features