[LintCode] Sort Integers 整数排序 - Grandyang - 博客园



[LintCode] Sort Integers 整数排序 - Grandyang - 博客园

Given an integer array, sort it in ascending order. Use selection sort, bubble sort, insertion sort or any O(n2) algorithm.

Example

Given [3, 2, 1, 4, 5], return [1, 2, 3, 4, 5].

 

这道题让我们实现最基本的几个O(n2)的排序算法,选择排序,冒泡排序和插入排序,都是最基本的排序算法。我们一个一个来看,首先来看冒泡排序,算法思路很简单,遍历数组,把当前数字的后面所有的数字都遍历一遍,遇到小的跟当前数字交换,这样遍历的过程中,所有大的数字就像气泡一样都到数组的后面去了,这也是为啥叫冒泡排序的原因,参见代码如下:


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