public class Account {

    // This class represents a bank account whose current
    // balance is a nonnegative amount in US dollars.

    // Initialize an account with the given balance. 
    public Account (int balance) {
        myBalance = balance;
    }
    
    // Add the given amount to the account.
    public void deposit (int amount) {
        if (amount < 0) {
            System.out.println ("Cannot deposit negative amount.");
        } else {    
            myBalance = myBalance + amount;
        }
    }
    
    // Subtract the given amount from the account
    // if possible.  If the amount would leave a
    // negative balance, print an error message and
    // leave the balance unchanged.
    public void withdraw (int amount) {
        if (amount < 0) {
            System.out.println ("Cannot withdraw negative amount.");
        } else if (myBalance < amount) {
            System.out.println ("Insufficient funds");
        } else {
            myBalance = myBalance - amount;
        }
    }
    
    // Return the number of dollars in the account.
    public int balance ( ) {
        return myBalance;
    }

    private int myBalance;
}