Question

感谢Laurence Burke在我关于isMaybeMoney功能的另一个问题中，我能够确定输入是否是金钱。

我现在正在做的是尝试计算兴趣后的总数，但我不断将无限写入屏幕。我感兴趣的功能在世界上有什么问题？当我使用1,234美元作为3.5％的利息的起始余额时，它应该是$ 3,522.55。

有人可以帮帮我吗？

static float money;

static void Main()
{
    string[] myMaybeBalances = Accounts.GetStartingBalances();

    myIsMaybeMoneyValidator Miimv = new myIsMaybeMoneyValidator();

    ArrayList interests = Miimv.interestsAccrued(myMaybeBalances);
    foreach (object interest in interests)
    {
        Console.WriteLine(interest);
    }

    Console.ReadLine();
}

public ArrayList interestsAccrued(string[] myMaybeBalances)
{
    ArrayList interests = new ArrayList();
    foreach (string myMaybeBalance in myMaybeBalances)
    {
        bool myResult = isMaybeMoney(myMaybeBalance);
        if (myResult == true)
        {
            decimal[] rates = Accounts.GetRates();

            for (int i = 0; i < rates.Length; i++)
            {
                decimal rate = rates[i];
                float total = 1;

                int n_X_t = 360;
                while (n_X_t != 0)
                {
                    rate = (1 + rates[i] / 12);
                    float myRate;
                    float.TryParse(rate.ToString(), out myRate);

                    total = total * myRate;
                    total = total * money;
                    n_X_t = n_X_t - 1;
                }
                interests.Add(total);
            }
        }
    }
    return interests;
}

public bool isMaybeMoney(object theirMaybeMoney)
{
    string myMaybeMoney = theirMaybeMoney.ToString();

    float num;
    bool isValid = float.TryParse(myMaybeMoney,
    NumberStyles.Currency,
    CultureInfo.GetCultureInfo("en-US"), // cached
    out num);

    money = num;
    return isValid;
}

Answer 1

你总计乘以while循环中每一步的速率，这似乎足够合理，但你也将总数乘以变量“money”的值，据我所知，这是起始余额。 / p>

所以你乘以起始平衡360次。如果只有我的储蓄帐户就这样工作！我不确定其余的逻辑是否正确，但首先，请尝试移动

total = total * money;

在

之下

float total = 1;

（或者更好的是从

改变

float total = 1;

到

float total = money;

并摆脱界限

total = total * money;

共）

Answer 2

您的代码未评估。没有利益的构造循环的好处计算！这不是必要的，但会引入很多高并发症的风险

以下是您想要使用FUNCTIONARY封装的代码：

    static void Main() 
    { 
        var interests = new List<decimal>(); 

        foreach (string possibleBalance in Accounts.GetStartingBalances()) 
        foreach (decimal rate in Accounts.GetRates()) 
        { 
            decimal balance; 
            if (!decimal.TryParse(possibleBalance, NumberStyles.Currency, CultureInfo.CurrentCulture, out balance))  
                continue; 

            decimal interest = CalculateInterestAccrued(balance, rate, 12, 30); 
            interests.Add(interest); 
        } 

        foreach (decimal interest in interests) 
            Console.WriteLine(interest); 

        Console.ReadKey(); 
    } 

    static decimal CalculateInterestAccrued(decimal principal, decimal rate, int compoundsPerYear, int years) 
    { 
        return principal * (decimal)Math.Pow((double)(1 + rate / compoundsPerYear), compoundsPerYear * years); 
    }

谢谢，

PRASHANT：）

无限利息计算？

2 个答案: