2022-11-25 02:04:38 +08:00
|
|
|
'''
|
|
|
|
|
File: linear_search.py
|
2022-12-03 22:54:19 +08:00
|
|
|
Created Time: 2022-11-26
|
|
|
|
|
Author: timi (xisunyy@163.com)
|
2022-11-25 02:04:38 +08:00
|
|
|
'''
|
|
|
|
|
|
|
|
|
|
import sys, os.path as osp
|
|
|
|
|
sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
|
|
|
|
|
from include import *
|
|
|
|
|
|
2022-12-03 22:54:19 +08:00
|
|
|
""" 线性查找（数组） """
|
|
|
|
|
def linear_search(nums,target):
|
|
|
|
|
# 遍历数组
|
|
|
|
|
for i in range(len(nums)):
|
|
|
|
|
if nums[i]==target: # 找到目标元素，返回其索引
|
|
|
|
|
return i
|
|
|
|
|
return -1 # 未找到目标元素，返回 -1
|
|
|
|
|
|
|
|
|
|
""" 线性查找（链表） """
|
|
|
|
|
def linear_search_by_link(head,target):
|
|
|
|
|
# 遍历链表
|
|
|
|
|
while head:
|
|
|
|
|
if head.val==target: # 找到目标结点，返回之
|
|
|
|
|
return head
|
|
|
|
|
head=head.next
|
|
|
|
|
return None # 未找到目标结点，返回 None (Python为None)
|
|
|
|
|
|
|
|
|
|
if __name__=='__main__':
|
|
|
|
|
target=3
|
|
|
|
|
# 在数组中执行线性查找
|
|
|
|
|
nums=[1, 5, 3, 2, 4, 7, 5, 9, 10, 8]
|
|
|
|
|
index=linear_search(nums,target)
|
|
|
|
|
print("目标元素 3 的索引 = " ,index)
|
|
|
|
|
|
|
|
|
|
# 在链表中执行线性查找
|
|
|
|
|
head=list_to_linked_list(nums)
|
|
|
|
|
node=linear_search_by_link(head,target)
|
|
|
|
|
print("目标结点值 3 的对应结点对象为 " ,node)
|
