选择排序（Selection sort）、插入排序（Insertion sort）与气泡排序（Bubble sort）这三个排序方式是初学排序所必须知道的三个基本排序方式，它们由于速度不快而不实用（平均与最快的时间复杂度都是O(n2)），然而它们排序的方式确是值得观察与探讨的。-Selection Sort (Selection sort), insertion sort (Insertion sort) and bubble sort (Bubble sort) three sort sort beginner needs to know three basic sort, they are not practical due to the slow speed (average and fastest the time complexity is O (n2)), but they sort of way is really worth watching and exploring.