Bank teller simulator

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_ACCOUNTS 100

typedef struct {
    int accountNumber;
    char accountHolderName[50];
    double balance;
} Account;

typedef struct {
    Account accounts[MAX_ACCOUNTS];
    int totalAccounts;
} Bank;

void createAccount(Bank *bank) {
    if (bank->totalAccounts >= MAX_ACCOUNTS) {
        printf("Maximum number of accounts reached!\n");
        return;
    }
    
    Account newAccount;
    newAccount.accountNumber = 1000 + bank->totalAccounts;
    printf("Enter account holder's name: ");
    scanf("%s", newAccount.accountHolderName);
    newAccount.balance = 0.0;

    bank->accounts[bank->totalAccounts++] = newAccount;
    printf("Account created successfully! Account Number: %d\n", newAccount.accountNumber);
}

void depositCash(Bank *bank) {
    int accountNumber;
    double amount;

    printf("Enter account number: ");
    scanf("%d", &accountNumber);

    for (int i = 0; i < bank->totalAccounts; i++) {
        if (bank->accounts[i].accountNumber == accountNumber) {
            printf("Enter amount to deposit: ");
            scanf("%lf", &amount);
            bank->accounts[i].balance += amount;
            printf("Cash deposited successfully! New Balance: %.2lf\n", bank->accounts[i].balance);
            return;
        }
    }
    printf("Account not found!\n");
}

void withdrawCash(Bank *bank) {
    int accountNumber;
    double amount;

    printf("Enter account number: ");
    scanf("%d", &accountNumber);

    for (int i = 0; i < bank->totalAccounts; i++) {
        if (bank->accounts[i].accountNumber == accountNumber) {
            printf("Enter amount to withdraw: ");
            scanf("%lf", &amount);
            if (amount > bank->accounts[i].balance) {
                printf("Insufficient balance!\n");
                return;
            }
            bank->accounts[i].balance -= amount;
            printf("Cash withdrawn successfully! New Balance: %.2lf\n", bank->accounts[i].balance);
            return;
        }
    }
    printf("Account not found!\n");
}

void displayAccountInfo(Bank *bank) {
    int accountNumber;

    printf("Enter account number: ");
    scanf("%d", &accountNumber);

    for (int i = 0; i < bank->totalAccounts; i++) {
        if (bank->accounts[i].accountNumber == accountNumber) {
            printf("Account Number: %d\n", bank->accounts[i].accountNumber);
            printf("Account Holder: %s\n", bank->accounts[i].accountHolderName);
            printf("Balance: %.2lf\n", bank->accounts[i].balance);
            return;
        }
    }
    printf("Account not found!\n");
}

void displayMenu() {
    printf("Bank Teller Service Simulator\n");
    printf("1. Create Account\n");
    printf("2. Deposit Cash\n");
    printf("3. Withdraw Cash\n");
    printf("4. Display Account Information\n");
    printf("5. Exit\n");
    printf("Choose an option: ");
}

int main() {
    Bank bank;
    bank.totalAccounts = 0;
    int choice;

    while (1) {
        displayMenu();
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                createAccount(&bank);
                break;
            case 2:
                depositCash(&bank);
                break;
            case 3:
                withdrawCash(&bank);
                break;
            case 4:
                displayAccountInfo(&bank);
                break;
            case 5:
                exit(0);
            default:
                printf("Invalid choice! Please try again.\n");
        }
    }

    return 0;
}