void deposit(BankAccount account[], int num_accts){
    int accountnum = 0;
    accountnum = accountNumPrompt();
    accountnum = find_acct(account, num_accts, accountnum);
    if(accountnum == -1){
        string message = "We couldn't find an account by that number";
        error(message);
        deposit(account, num_accts);
    }else{
        BankAccount * b = &account[accountnum];
        double howmuch = 0.00;
        cout << endl << "How much do you want to deposit?" << endl;
        cin >> howmuch;
        b->addAccountBalance(howmuch);
        cout << endl << howmuch << " has been deposited int account: " << b->getAccountNumber() << endl;
    }
}