def Selection_Sort(arr): n = len(arr) for i in range(0 , n): min = i for j in range(i+1,n): if arr[j] < arr[min]: min = j arr[i],arr[min] = arr[min],arr[i] def BucketSort(arr): minV = min(arr) maxV = max(arr) bucketCount = 3 bucket = [[],[],[]] perBucket = (maxV - minV + bucketCount) // bucketCount for num in arr: bucketIndex = (num - minV) // perBucket bucket[bucketIndex].append(num) for i in range(bucketCount): Selection_Sort(bucket[i]) idx = 0 for i in range(bucketCount): for v in bucket[i]: arr[idx] = v idx += 1 print(bucket) print(arr) arr = [7,11,5,9,8,6,3,12,1,10,4,2] BucketSort(arr) 。 先将这些代码详细注释,然后再优化代码并且同样详细注释。
时间: 2023-06-14 10:05:13 浏览: 121
bubble_select_sort.zip
注释版代码:
```
# 选择排序
def Selection_Sort(arr):
n = len(arr)
# 遍历数组
for i in range(0 , n):
min = i
# 找到最小值的下标
for j in range(i+1,n):
if arr[j] < arr[min]:
min = j
# 将最小值与当前位置交换
arr[i],arr[min] = arr[min],arr[i]
# 桶排序
def BucketSort(arr):
# 找到最小值和最大值
minV = min(arr)
maxV = max(arr)
# 确定桶的数量
bucketCount = 3
# 创建桶
bucket = [[],[],[]]
# 确定每个桶的区间范围
perBucket = (maxV - minV + bucketCount) // bucketCount
# 将元素分配到桶中
for num in arr:
bucketIndex = (num - minV) // perBucket
bucket[bucketIndex].append(num)
# 对每个桶进行排序
for i in range(bucketCount):
Selection_Sort(bucket[i])
# 将桶中的元素合并
idx = 0
for i in range(bucketCount):
for v in bucket[i]:
arr[idx] = v
idx += 1
# 打印桶和排序后结果
print(bucket)
print(arr)
# 测试
arr = [7,11,5,9,8,6,3,12,1,10,4,2]
BucketSort(arr)
```
优化版代码:
```
# 选择排序
def selection_sort(arr):
n = len(arr)
# 遍历数组
for i in range(n):
min_index = i
# 找到最小值的下标
for j in range(i+1, n):
if arr[j] < arr[min_index]:
min_index = j
# 将最小值与当前位置交换
arr[i],arr[min_index] = arr[min_index],arr[i]
# 桶排序
def bucket_sort(arr):
# 找到最小值和最大值
min_value = min(arr)
max_value = max(arr)
# 确定桶的数量
bucket_count = 3
# 创建桶
buckets = [[] for _ in range(bucket_count)]
# 确定每个桶的区间范围
per_bucket = (max_value - min_value + bucket_count) // bucket_count
# 将元素分配到桶中
for num in arr:
bucket_index = (num - min_value) // per_bucket
buckets[bucket_index].append(num)
# 对每个桶进行排序
for i in range(bucket_count):
selection_sort(buckets[i])
# 将桶中的元素合并
idx = 0
for i in range(bucket_count):
for v in buckets[i]:
arr[idx] = v
idx += 1
# 打印桶和排序后结果
print(buckets)
print(arr)
# 测试
arr = [7,11,5,9,8,6,3,12,1,10,4,2]
bucket_sort(arr)
```
优化后的代码主要是对变量名的修改和使用列表推导式创建桶对象,使代码更具可读性和简洁性。
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