2的n次方 [英] 2 to the power of n

问题描述

谁能向我展示如何在C#中编写以n的幂为单位的计算2的代码?

Hi,

Can anyone show me how I can write code for computing 2 to the power of n in C#?

推荐答案

我认为预期的答案是特定于2的幂的整数方法:

I think intended answer is integer method specific to powers of 2:

static int PowerOfTwo(int power) {
   return 1 << power;
}

使用Math.Pow.

http://msdn.microsoft.com/en-us/library/system.math. pow.aspx [ ^ ]

Use Math.Pow.

http://msdn.microsoft.com/en-us/library/system.math.pow.aspx[^]

如果n是+ | N的元素，则可以这样操作:

If n is element of +|N you can do it like this:

public static double twoPow(int n)
{
    if(n==0)
        return 1.0;
    else
        return 2.0 * twoPow(n-1);
}

当然，这是非常严格的，纯粹是为了给您提供一个想法，您始终可以按照Nishant告诉您的内容进行操作.

干杯！

This is of course very restrictive and purely to give you an idea and you can always go by what Nishant told you.

Cheers!

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