15、1 什么叫递归
A definition in which something is defined in terms of smaller versions of inself.
15、2 使用简单变量设计递归算法
N! = N * N( N – 1 )!
15、3 汉诺塔
15、4 使用构造变量设计递归算法
15、5 使用递归还是迭代
It’s depended on two issues:
efficiency and the nature of the problem being solved.