def bubble_sort(arr)代码注释

以下是对 bubble_sort(arr) 函数的注释：

def bubble_sort(arr):
    """
    对传入的列表 arr 进行冒泡排序，从小到大排序。

    参数：
    arr：待排序的列表

    返回值：
    无返回值，原列表被排序。

    """
    n = len(arr)
    # 外层循环控制比较轮数，共需要比较 n-1 轮
    for i in range(n-1):
        # 内层循环控制每轮比较的位置，由于每轮确定一个最大值，
        # 所以只需要比较前 n-i-1 个元素即可
        for j in range(n-i-1):
            # 如果前一个元素比后一个元素大，交换两个元素
            if arr[j] > arr[j+1]:
                arr[j], arr[j+1] = arr[j+1], arr[j]

相关问题

def bubble_sort

Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order. The pass through the list is repeated until the list is sorted. Here's an example of bubble sort in Python:

def bubble_sort(arr):
    n = len(arr)
    # Traverse through all array elements
    for i in range(n):
        # Last i elements are already in place
        for j in range(0, n-i-1):
            # Swap if the element found is greater than the next element
            if arr[j] > arr[j+1]:
                arr[j], arr[j+1] = arr[j+1], arr[j]
    return arr

This function takes an array `arr` as input and returns a sorted array using bubble sort. The outer loop runs `n` times, where `n` is the length of the array. For each iteration of the outer loop, the inner loop runs `n-i-1` times, where `i` is the current iteration of the outer loop. The inner loop compares adjacent elements and swaps them if they are in the wrong order. At the end of each iteration of the outer loop, the last `i` elements are already in place, so the inner loop doesn't need to check them again.

import random import time def bubble_sort(arr): n = len(arr) for i in range(n): for j in range(n-i-1): if arr[j] > arr[j+1]: arr[j], arr[j+1] = arr[j+1], arr[j] return arr为这段代码加上注释

# 导入 random 和 time 模块
import random
import time

# 定义冒泡排序函数，参数为待排序的列表
def bubble_sort(arr):
    n = len(arr)  # 获取列表长度
    for i in range(n):  # 外层循环控制排序轮数
        for j in range(n-i-1):  # 内层循环控制每轮排序中的比较次数
            if arr[j] > arr[j+1]:  # 如果前一个数比后一个数大，则交换两个数的位置
                arr[j], arr[j+1] = arr[j+1], arr[j]
    return arr  # 返回排好序的列表

注释的作用是为了让代码更易懂，方便阅读和维护。