实际上，使用递归是为了降低手头问题的复杂性。你应用递归，直到你达到一个简单的基本情况，可以很容易地解决。这样就可以解决最后一个递归步骤。用这些递归步骤就可以解决最初的问题。

子函数隐式地使用递归，例如:

去迪士尼乐园自驾游

我们到了吗?(没有) 我们到了吗?(很快) 我们到了吗?(快了……) 我们到了吗? 我们到了吗?(!!!!!)

这时孩子就睡着了……

这个倒数函数是一个简单的例子:

倒计时()函数 ｛ 返回(参数[0]> 0 ? （ Console.log(参数[0])，倒计时(参数[0]- 1)): “完成” ）; ｝ 倒计时(10);

霍夫施塔特定律也适用于软件项目。

The essence of human language is, according to Chomsky, the ability of finite brains to produce what he considers to be infinite grammars. By this he means not only that there is no upper limit on what we can say, but that there is no upper limit on the number of sentences our language has, there's no upper limit on the size of any particular sentence. Chomsky has claimed that the fundamental tool that underlies all of this creativity of human language is recursion: the ability for one phrase to reoccur inside another phrase of the same type. If I say "John's brother's house", I have a noun, "house", which occurs in a noun phrase, "brother's house", and that noun phrase occurs in another noun phrase, "John's brother's house". This makes a lot of sense, and it's an interesting property of human language.

参考文献

递归与人类思想

你在用哪本书?

关于算法的标准教科书是Cormen & Rivest。我的经验是，它很好地教授了递归。

递归是编程中较难掌握的部分之一，虽然它确实需要本能，但它是可以学习的。但它确实需要一个好的描述，好的例子和好的插图。

此外，30页通常是很多的，30页是用一种编程语言编写的。在你从一本普通的书中理解递归之前，不要尝试用C或Java学习递归。

这与其说是一个问题，不如说是一个抱怨。关于递归你有更具体的问题吗?就像乘法一样，人们不会写很多关于它的东西。

说到乘法，想想这个。

问题:

* b是什么?

答:

如果b = 1，就是a。 否则就是a+a*(b-1)

* (b - 1)是什么?请参考上面的问题来解决这个问题。

递归

方法A调用方法A调用方法A，最终这些方法A中的一个不会调用并退出，但这是递归，因为有东西调用了它自己。

递归的例子，我想打印出硬盘驱动器上的每个文件夹名称:(在c#中)

public void PrintFolderNames(DirectoryInfo directory)
{
    Console.WriteLine(directory.Name);

    DirectoryInfo[] children = directory.GetDirectories();

    foreach(var child in children)
    {
        PrintFolderNames(child); // See we call ourself here...
    }
}

Ouch. I tried to figure out the Towers of Hanoi last year. The tricky thing about TOH is it's not a simple example of recursion - you have nested recursions which also change the roles of towers on each call. The only way I could get it to make sense was to literally visualize the movement of the rings in my mind's eye, and verbalize what the recursive call would be. I would start with a single ring, then two, then three. I actually ordered the game on the internet. It took me maybe two or three days of cracking my brains to get it.