java - 我该如何修复这个错误？需要双，双；发现双重；

Question

public class Account{

//实例变量

private double balance;
private double interestRate;

//构造函数

public void Account(double initialBalance) {
     if (balance < 0) {
     balance = initialBalance;
     }
}

public void Account() {
     balance = 0.0;
}

//实例方法

public void withdraw(double amount) {
     double backup = balance;
     balance = balance - amount;
     if (balance < 0) {
          System.out.println("error");
          balance = backup;
     }
}

//提现使用的方法

public void deposit(double amount) {
      balance = balance + amount;
      if (balance >= 10000){
           System.out.println("You are now rich");
      }
}

public double getBalance() {
     return balance;
}

public double setInterest(double rate){
     interestRate = rate;
}

public double computeInterest (int n) {
     double computeInterest = Math.pow(interestRate + balance * n);
     return computeInterest; 

}

//此方法包含错误，并表示它需要两个 double ，但只能//找到一个

public void close() {
     balance = 0.0;
}

//关闭余额的方法

}

Answer 1

您仅向 computeInterest() 方法中的 Math.pow() 提供一个参数。需要两个 double 。