def non_recursive_sorting(list,n): if n <= 1: return list if n==2: if list[0] > list[1]: list[0], list[0] = list[1], list[0] for i in range(n-1): if list[i] > list[i + 1]: list[i], list[i + 1] = list[i + 1], list[i] return non_recursive_sorting(list,n-1) test = [random.randint(0,10000) for j in range(10000)] print(non_recursive_sorting(test,len(test)))这段代码有什么问题
时间: 2023-06-12 12:02:04 浏览: 78
这段代码实现的是非递归的冒泡排序,但是在第6行的比较操作中,索引写错了,应该是list[i] > list[i+1]而不是list[i] > list[i 1],由于这个错误可能导致排序结果不正确。同时,在第3行中,n <= 1应该改为 n < 2 ,因为当n=1时应该直接返回list而不是继续递归。另外,没有定义random模块,需要在代码前面添加import random。
相关问题
解释 def recursive_sum(n): if n == 1: return 1 else: return n + recursive_sum(n-1)
这是一个递归函数,用于计算从1到n的自然数的和。当n等于1时,函数返回1,否则函数返回n加上调用自身传入n-1的结果。这样,函数会一直递归调用自己,一直到n等于1为止,然后依次返回结果,最终得到从1到n的自然数的和。但是这段代码有一个错误,因为return语句中的递归调用没有放在else语句块中,导致函数会一直递归调用自己,最终引发栈溢出错误。正确的写法应该是:
```
def recursive_sum(n):
if n == 1:
return 1
else:
return n + recursive_sum(n-1)
```
这样,函数就可以正确计算从1到n的自然数的和了。
Write a function link_to_list that takes in a linked list and returns the sequence as a Python list. You may assume that the input list is shallow; none of the elements is another linked list. Try to find both an iterative and recursive solution for this problem!其中class Link: empty = () def init(self, first, rest=empty): assert rest is Link.empty or isinstance(rest, Link) self.first = first self.rest = rest def repr(self): if self.rest is not Link.empty: rest_repr = ', ' + repr(self.rest) else: rest_repr = '' return 'Link(' + repr(self.first) + rest_repr + ')' def str(self): string = '<' while self.rest is not Link.empty: string += str(self.first) + ' ' self = self.rest return string + str(self.first) + '>'
Sure! Here's an iterative solution for the function link_to_list:
```
def link_to_list_iter(link):
result = []
while link is not Link.empty:
result.append(link.first)
link = link.rest
return result
```
And here's a recursive solution:
```
def link_to_list_rec(link):
if link is Link.empty:
return []
else:
return [link.first] + link_to_list_rec(link.rest)
```
Both functions take a linked list as input and return it as a Python list. Hope this helps!
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