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algorithm's Introduction

目前正在学习算法，所以相关的C/C++代码都会放到这个仓库下面

  • 算法练习相关代码主要是来自剑指Offer与LeetCode题目

关于递归和迭代

递归优点

  • 简洁

递归缺点

  • 递归需要用到函数调用，函数调用需要时间和空间的消耗：每一次函数调用都需要在内存栈中分配空间来保存参数、返回地址及临时变量；对于栈中数据的压入和弹出都需要一定的时间。
  • 递归有可能计算了多次重复，例如Fibonacci数列
  • 更严重的问题：每一次调用函数都需要栈空间，每个进程的栈的容量有限，当调用层级太大的时候，就会超出栈的容量，导致调用栈溢出。写一个简单的1+2+3..+n就可以知道，如果n太大，递归就会出错。

迭代优点

  • 可以避免以上的缺点

迭代缺点

  • 需要较多代码

algorithm's People

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