为什么我得到错误的结果？ [英] Why do I get the wrong results?

问题描述

我写了一个C＃程序来计算以不同利率计算的投资总额。



复合利息公式我正在使用：P （1 + r） n



我看不出我做错了什么。



例如：

金额：100

费率：10

年：5

随着一个计算器，答案是161.05



但是一旦我用我的程序执行它计算到100.00001



非常感谢您的帮助。



我尝试过：

I've written a C# program to calculate the total of the money invested at different amounts of interest rates.

Compound interest formula I'm using: P (1 + r )n

I cant see what I'm doing wrong.

For example:
Amount: 100
Rate: 10
years: 5
With a calculator the answer is 161.05

But once I do it with my program it calculates to 100.00001

Your help is much appreciated.

What I have tried:

double amount;
     double rate;
     double years;
     double total;
     amount = Convert.ToDouble(textBox1.Text);
     rate = Convert.ToDouble(textBox2.Text);
     years = Convert.ToDouble(textBox3.Text);

     rate = rate / 100;

     total = amount * 1 + Math.Pow(rate, years);

     label1.Text = total.ToString();

推荐答案

你没有正确翻译公式。

You didn't traslate correctly the formula.

引用：

total = amount * 1 + Math.Pow（rate，years）;

total = amount * 1 + Math.Pow(rate, years);

应该是

Should be instead

total = amount * Math.Pow(1 + rate, years);

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