#冒泡排序
list1=[2,4,5,6,7,8,9,11,30,35,38,41,42] def bubble_sort(list): for i in range(len(list)-1): for j in range(len(list)-1-i): if list[j]>list[j+1]: list[j],list[j+1]=list[j+1],list[j] print(list) list1=[2,4,55,6,78,38,95,11,30,35,38,41,42] bubble_sort(list1)
#递归二分查找法 list1=[2,4,5,6,7,8,9,11,30,35,38,41,42] def erzcf(start,stop,item,list1): mid=(start+stop)//2 if start>stop: return -1 if item ==list1[mid]: return mid elif item>list1[mid]: return erzcf(mid+1,stop,item,list1) else: return erzcf(start,mid-1,item,list1) print(erzcf(0,len(list1)-1,30,list1))
#二分法
list1=[2,4,5,6,7,8,9,11,30,35,38,41,42] def erfengfa(start,end,item,list1): while start<=end: mid=(start+end)//2 if item==list1[mid]: return mid elif item>list1[mid]: start=mid+1 else: end=mid-1 return -1 print(erfengfa(0,len(list1)-1,30,list1))
原文：https://www.cnblogs.com/wutanghua/p/11105087.html