3大排序算法--冒泡、选择、插入

1、冒泡

def bubble_sort_1(li):
    for i in range(len(li) - 1):
        exchange = False
        for j in range(len(li) - i - 1):
            if li[j] > li[j+1]:
                li[j], li[j+1] = li[j+1], li[j]
                exchange = True
        if not exchange:
            break
　　

 

2、选择

def select_sort(li):
    for i in range(len(li) - 1):
        min_loc = i
        for j in range(i+1,len(li)):
            if li[j] < li[min_loc]:
                min_loc = j
        li[i], li[min_loc] = li[min_loc], li[i]

3、插入

def insert_sort(li):
    for i in range(1, len(li)):
        tmp = li[i]
        j = i - 1
        while j >= 0 and li[j] > tmp:
            li[j+1]=li[j]
            j = j - 1
        li[j + 1] = tmp