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44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
def quickSort(data_list):
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quickSortHlp(data_list,0,len(data_list)-1)
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def quickSortHlp(data_list,first,last):
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if first < last:
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splitpoint = partition(data_list,first,last)
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quickSortHlp(data_list,first,splitpoint-1)
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quickSortHlp(data_list,splitpoint+1,last)
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def partition(data_list,first,last):
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pivotvalue = data_list[first]
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leftmark = first+1
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rightmark = last
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done = False
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while not done:
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while leftmark <= rightmark and data_list[leftmark] <= pivotvalue:
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leftmark = leftmark + 1
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while data_list[rightmark] >= pivotvalue and rightmark >= leftmark:
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rightmark = rightmark -1
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if rightmark < leftmark:
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done = True
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else:
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temp = data_list[leftmark]
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data_list[leftmark] = data_list[rightmark]
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data_list[rightmark] = temp
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temp = data_list[first]
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data_list[first] = data_list[rightmark]
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data_list[rightmark] = temp
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return rightmark
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data_list = [54,26,93,17,77,31,44,55,20]
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quickSort(data_list)
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print(data_list) |