//代码四 public class Account { private int balance_; // 账户余额 public int getBalance(void) { return balance_; } public void setBalance(int setting) { balance_ = setting; } }
public class CustomerInfo { private int numAccounts_; private Account[] accounts_; public void withdraw(int accountNumber, int amount) { int temp = accounts_[accountNumber].getBalance(); temp = temp - amount; accounts_[accountNumber].setBalance(temp); } public void deposit(int accountNumber, int amount) { int temp = accounts_[accountNumber].getBalance(); temp = temp + amount; accounts_[accountNumber].setBalance(temp); } }