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Я работаю над назначением банковского счета. Похоже, я правильно понял логику, но не дает правильного вывода. Я думаю, что цикл не понимает, что я пытаюсь сказать ему. Я помещаю методы, вызванные не в том месте? Я приложил образец вывода. Я ценю вашу помощь! СпасибоКак мне исправить мой цикл?
/**
* This program prints a payoff schedule for a bank customer.
Input: Account number, name of customer, and account balance.
Output: Prints payoff schedule that includes payment amount and new balance
until the account will be paid off. A customer must pay off their account when
the balance reaches $10 or less. 1.2% interest is added at the beginning of
each month and the customer then makes a payment equal to 5% of the current balance.
*/
public class DT_BankAccount
{
private String accountNum;
private String customerName;
private double customerBalance;
double interest = 0.00; // Start out with 0.00 value for the customer.
double payment = 0.00; // Start out with 0.00 value for the customer.
/**
* Constructor: Constructs a payoff schedule for a bank customer including account number, name of customer, and account balance.
* @param account number - the account number of the customer
* @param name of customer - the customer's name of the bank account
* @param account balance - the account balance of the customer
*/
public DT_BankAccount(String accountNum, String customerName, double customerBalance)
{
// Initialize constructors
this.accountNum = accountNum;
this.customerName = customerName;
this.customerBalance = customerBalance;
}
/**
* This method calculates interest and return the balance times the 1.2% interest: the balance times the 1.2% interest
* @return the balance times the 1.2% interest
*/
public double CalculateInterest()
{
return interest = customerBalance * 0.012;
}
/**
* This method calculates new balance adds the interest to the balance
*/
public void CalculateNewBalance()
{
payment = customerBalance + interest;
}
/**
* This method calculates new payment returns the balance times 5%: the balance times 5%
* @return the balance times 5%
*/
public double CalculatePayment()
{
return payment * 0.05;
}
/**
* This method updates the balance after the payment is made: the updated (newest) balance
* @return the updated (newest) balance
*/
public double BalanceUpdated()
{
return customerBalance = customerBalance + interest - payment;
}
}
import javax.swing.JOptionPane; // import JOptionPane class
public class DT_PayoffTester
{
public static void main(String args[])
{
// Declare and initialize variables.
String accountNum;
String customerName;
String stringCustomerBalance;
double customerBalance = 0.00;
double controller = 10.00; // Controls while loop.
// Get input.
accountNum = JOptionPane.showInputDialog("Enter account number: ");
customerName = JOptionPane.showInputDialog("Enter customer's name: ");
stringCustomerBalance = JOptionPane.showInputDialog("Enter customer's balance: ");
// Convert string to double.
customerBalance = Double.parseDouble(stringCustomerBalance);
// creates one instance of the BankAccoount class by calling it’s constructor.
DT_BankAccount BA = new DT_BankAccount(accountNum,customerName,customerBalance);
System.out.println(customerName + "\n");
while (BA.BalanceUpdated() > controller)
{
// methods called
BA.CalculateInterest();
BA.CalculateNewBalance();
BA.CalculatePayment();
BA.BalanceUpdated();
System.out.println("Payment: " + BA.CalculatePayment());
System.out.println("New Balance: " + BA.BalanceUpdated() + "\n");
} // End of while loop.
System.out.println("Account Number: " + accountNum);
System.out.println("Final Balance Amount: " + BA.BalanceUpdated());
System.out.println("Loan Paid Off");
System.exit(0);
}
}
Пример вывода:
Start of sample output
Billie Gates
Payment: $12.02
New Balance: $228.39
Payment: $11.56
New Balance: $219.57
Payment: $11.11
New Balance: $211.09
Payment: $10.68
New Balance: $202.95
Payment: $10.26
New Balance: $195.11
Payment: $9.87
New Balance: $187.58
Payment: $9.49
New Balance: $180.34
Перейти к концу выхода образца:
Payment: $ 0.62
New Balance: $11.92
Payment: $ 0.60
New Balance: $11.46
Payment: $0.58
New Balance: $11.02
Payment: $0.55
New Balance: $10.59
Payment: $0.53
New Balance: $10.18
Payment: $0.51
New Balance:$ 9.79
Account Number: 91234567
Final Balance Amount:$ 9.79
Loan Paid Off
Мой вывод (неправильный)
Billie Gates
Payment: 6.229872
New Balance: -123.12
Account Number: 123
Final Balance Amount: -369.36
Loan Paid Off
Когда 'BA.BalanceUpdated()' <= 10.00, ваш цикл остановится, это логика, которую вы хотели? Первый возвращенный баланс уже равен <= 10.00 (это '-123.12'). Можно сделать много улучшений, например. сохраните возвращаемое значение переменной вместо вызова 'BA.BalanceUpdated()' несколько раз. – Raptor
Я не знаю, почему первый новый баланс является отрицательным числом! –
Не вводите этого пользователя? – Raptor