50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
|
/**
|
||
|
|
* File: linear_search.cpp
|
||
|
|
* Created Time: 2022-11-25
|
||
|
|
* Author: krahets (krahets@163.com)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "../utils/common.hpp"
|
||
|
|
|
||
|
|
/* 线性查找（数组） */
|
||
|
|
int linearSearchArray(vector<int> &nums, int target) {
|
||
|
|
// 遍历数组
|
||
|
|
for (int i = 0; i < nums.size(); i++) {
|
||
|
|
// 找到目标元素，返回其索引
|
||
|
|
if (nums[i] == target)
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
// 未找到目标元素，返回 -1
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* 线性查找（链表） */
|
||
|
|
ListNode *linearSearchLinkedList(ListNode *head, int target) {
|
||
|
|
// 遍历链表
|
||
|
|
while (head != nullptr) {
|
||
|
|
// 找到目标节点，返回之
|
||
|
|
if (head->val == target)
|
||
|
|
return head;
|
||
|
|
head = head->next;
|
||
|
|
}
|
||
|
|
// 未找到目标节点，返回 nullptr
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Driver Code */
|
||
|
|
int main() {
|
||
|
|
int target = 3;
|
||
|
|
|
||
|
|
/* 在数组中执行线性查找 */
|
||
|
|
vector<int> nums = {1, 5, 3, 2, 4, 7, 5, 9, 10, 8};
|
||
|
|
int index = linearSearchArray(nums, target);
|
||
|
|
cout << "目标元素 3 的索引 = " << index << endl;
|
||
|
|
|
||
|
|
/* 在链表中执行线性查找 */
|
||
|
|
ListNode *head = vecToLinkedList(nums);
|
||
|
|
ListNode *node = linearSearchLinkedList(head, target);
|
||
|
|
cout << "目标节点值 3 的对应节点对象为 " << node << endl;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|