找出给定问题中的错误 [英] Find the mistake in the given problem

问题描述

我最近接受了采访，他们在下面的代码中提出了一个问题，找出错误。



它如果有人能描述的话会很有帮助...

Hi,
I have recently given an interview, where they asked one question to find the mistake in below code.

It would be helpful if anyone can describe...

class Program
    {
        static void Main(string[] args)
        {
            int i = GetDecimalPlaces(0.001);
            Console.Write(i.ToString());
            Console.ReadLine();
        }

        public static int GetDecimalPlaces(double accuracy)
        {
            return Math.Min(0, -(int)(Math.Floor(Math.Log10(accuracy))));
            
        }
    }

对于0.001，答案应为3。



谢谢。



我的尝试：



我不知道Log10。



我也尝试谷歌但没有结果。

answer should be "3" for "0.001".

Thank You.

What I have tried:

I have no idea about Log10.

Also I tried to google but there is no result.

推荐答案

Logarithm10（x）将返回在这种情况下10的基数必须提高以获得值x，

在这种情况下， x是0.001，所以log10（0.001）返回-3，即10 ^（ - 3）= 0.001

无论如何，只需更改

Logarithm10(x) will return the power that a base in this case 10, must raise in order to get the value x,
in this case, the x is 0.001, so log10(0.001) return -3, i.e. 10^(-3) = 0.001
Anyway, just change

Math.Min

to

to

Math.Max

使用调试器查看代码正在执行的操作。它允许你逐行执行第1行并在执行时检查变量。



调试器 - 维基百科，免费的百科全书 [ ^ ]

掌握Visual Studio 2010中的调试 - 初学者指南 [ ^ ]



调试器在这里向您展示您的代码正在做什么。

没有在调试器中魔术，它没有找到bug，它只是帮助你。

Use the debugger to see what your code is doing. It allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]

The debugger is here to show you what your code is doing.
There is no magic in the debugger, it don't find bugs, it just help you to.

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