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41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
"""
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File: linear_search.py
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Created Time: 2022-11-26
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Author: timi (xisunyy@163.com)
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"""
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import sys, os.path as osp
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sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
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from modules import *
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def linear_search_array(nums: list[int], target: int) -> int:
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""" 线性查找（数组） """
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# 遍历数组
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for i in range(len(nums)):
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if nums[i] == target: # 找到目标元素，返回其索引
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return i
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return -1 # 未找到目标元素，返回 -1
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def linear_search_linkedlist(head: ListNode, target: int) -> ListNode | None:
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""" 线性查找（链表） """
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# 遍历链表
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while head:
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if head.val == target: # 找到目标结点，返回之
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return head
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head = head.next
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return None # 未找到目标结点，返回 None
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""" Driver Code """
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if __name__ == '__main__':
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target: int = 3
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# 在数组中执行线性查找
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nums: list[int] = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
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index: int = linear_search_array(nums, target)
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print("目标元素 3 的索引 =", index)
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# 在链表中执行线性查找
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head: ListNode = list_to_linked_list(nums)
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node: ListNode | None = linear_search_linkedlist(head, target)
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print("目标结点值 3 的对应结点对象为", node)
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