Question

大家好，所以我想弄清楚如何让这个代码建立一个银行帐户，但我只能得到零，以获得余额的答案，所有这些，你能帮助我吗？如果你想知道我不允许输入。

包运动12;

public class exercise12 {
    public static void main(String[] args) {
        Account myaccount = new Account(0, 0, 0, 0);
        System.out.println("my initial balance is " + myaccount.getBalance());

        System.out.println("depositing 32.19");
        myaccount.deposit(32.19);
        System.out.println("now my balance is " + myaccount.getBalance());

        System.out.println("withdrawing 90.00");
        myaccount.withdraw(90.00);
        System.out.println("now my balance is " + myaccount.getBalance());

        System.out.println("withdrawing 10.00");    
        myaccount.withdraw(10.00);
        System.out.println("now my balance is " + myaccount.getBalance());
    }
}
class Account {
    public Account (double a, double b, double c, double d) {
     deposit = a;
     withdraw = b;
     account = c;
     Balance = d;
   }

    public void deposit(double d) {
        // TODO Auto-generated method stub

    }

    Double Balance;
    Double withdraw;
    Double deposit;
    Double account;
    public void setmoney(double Balance, double withdraw, double deposit, double account){
        setBalance(Balance);
        setwithdraw(withdraw);
        setdeposit(deposit);
        setaccount(account);
    }
    public double getdeposit() {
        return deposit;
    }
    public double withdraw(double d) {
        return withdraw;
    }
    public double getaccount() {
        return account;
    }
    public double getBalance() {
        Balance = account - withdraw + deposit;
        return Balance;
    }
    public void setaccount(double accountmoney) {
    }
    public void setdeposit(double depositmoney) {
    }
    public void setwithdraw(double withdrawmoney) {
    }
    public void setBalance(double balancemoney) {
    }

}

Answer 1

您的deposit()和withdraw()方法不会更改帐户中的余额。实际上，它们不会对Account对象中的任何变量进行任何更改。

您的构造函数应该只设置期初余额。
您不需要变量来存储deposit和withdraw。
您的deposit()方法应将存入的金额添加到余额变量中。
您的withdraw()方法应从余额变量中扣除已提取的金额。

例如：

class Account {

    Double balance;
    Double account;

    public Account (final double accountNumber, final double initialBalance) {
       account = accountNumber;
       balance = initalBalance;
    }

    public void deposit(final double amount) {
        balance += amount;
    }

    public double withdraw(final double amount) {
        balance -= amount;
        return balance;
    }

    public double getAccount() {
        return account;
    }

    public double getBalance() {
        return balance;
    }

}

无法弄清楚下一步

1 个答案: