'''
File: linear_search.py
Created Time: 2022-11-26
Author: timi (xisunyy@163.com)
'''

import sys, os.path as osp
sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
from include import *

""" 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)