C++ Project – ATM Management System

Program 1

// ATM Bank Application
#include <iostream>
#include <string.h>
#include <cstdlib> // for system("cls")
#include <conio.h> // for getch()
using namespace std;

class ATM 
{
private:
    int acno;
    string name;
    int amount;

public:
    void createAccount() 
    {
        cout << "\nEnter Account Number: ";
        cin >> acno;
        cout << "Enter Your Name: ";
        cin >> name;
        cout << "Enter Initial Amount: ";
        cin >> amount;
    }

    void deposit() 
    {
        int amt;
        cout << "Name: " << name << endl;
        cout << "Enter amount to deposit: ";
        cin >> amt;  //5000
        if (amt < 0) {
            cout << "Invalid amount.\n";
        } else {
            amount += amt;
            cout << "Deposit successful.\n";
        }
    }

    void withdraw() 
    {
        int amt;
        cout << "Name: " << name << endl;
        cout << "Enter amount to withdraw: ";
        cin >> amt;
        if (amt < 0 || amt > amount) {
            cout << "Invalid or insufficient amount.\n";
        } else {
            amount -= amt;
            cout << "Withdrawal successful.\n";
        }
    }

    void displayBalance() 
    {
        cout << "\nAccount No: " << acno;
        cout << "\nName: " << name;
        cout << "\nBalance: " << amount << "\n";
    }

    void displayDetails()  {
        cout << "\n" << acno << "\t" << name << "\t" << amount;
    }

    int getAccountNumber() 
     {
        return acno;
    }
};

// Global array for 5 accounts
ATM accounts[5];   // Array of Object
int accountCount = 0;

void design() 
{
    cout << "\n---- ATM Banking Management System ----\n";
    cout << "1. Create Account\n";
    cout << "2. Deposit Amount\n";
    cout << "3. Withdraw Amount\n";
    cout << "4. Check Balance\n";
    cout << "5. Display All Accounts\n";
    cout << "6. Exit\n";
    cout << "---------------------------------------\n";
}

void createAccounts() 
{
    for (int i = 0; i < 5; i++) 
    {
        cout << "\nCreating Account " << i + 1 << ":\n";
        accounts[i].createAccount();  //accounts[1]
    }
    accountCount = 5;
}

void depositAmount() 
{
    int acc;
    cout << "Enter Account Number: ";
    cin >> acc;  

    for (int i = 0; i < accountCount; i++) 
    {
        if (accounts[i].getAccountNumber() == acc)
         {
            accounts[i].deposit();
            return;
        }
    }
    cout << "Account not found.\n";
}

void withdrawAmount() 
{
    int acc;
    cout << "Enter Account Number: ";
    cin >> acc;

    for (int i = 0; i < accountCount; i++) 
    {
        if (accounts[i].getAccountNumber() == acc) 
        {
            accounts[i].withdraw();
            return;
        }
    }
    cout << "Account not found.\n";
}

void checkBalance()
 {
    int acc;
    cout << "Enter Account Number: ";
    cin >> acc;

    for (int i = 0; i < accountCount; i++) {
        if (accounts[i].getAccountNumber() == acc) {
            accounts[i].displayBalance();
            return;
        }
    }
    cout << "Account not found.\n";
}

void displayAllAccounts() {
    cout << "\nAccount No\tName\tBalance";
    for (int i = 0; i < accountCount; i++) {
        accounts[i].displayDetails();
    }
    cout << "\n";
}

int main() {
    system("cls"); // Clears screen

    char pin[5]; 
    cout << "Enter your 4-character PIN: ";
    for (int i = 0; i < 4; i++) 
    {
        pin[i] = getch();
        cout << "*";
    }
    pin[4] = '\0';

    if (strcmp(pin, "data") == 0)
     {
        int choice;
        do {
            design();
            cout << "\nEnter your choice: ";
            cin >> choice;

            switch (choice) 
            {
                case 1: createAccounts(); break;
                case 2: depositAmount(); break;
                case 3: withdrawAmount(); break;
                case 4: checkBalance(); break;
                case 5: displayAllAccounts(); break;
                case 6: cout << "Exiting...\n"; break;
                default: cout << "Invalid choice.\n"; break;
            }
        } while (choice != 6);
    } else {
        cout << "\nInvalid PIN.\n";
    }

    return 0;
}