2023-03-20 19:17:20 +08:00
|
|
|
/**
|
|
|
|
* File: linear_search.c
|
|
|
|
* Created Time: 2023-03-19
|
|
|
|
* Author: Guanngxu (446678850@qq.com)
|
|
|
|
*/
|
|
|
|
|
2023-04-24 04:11:18 +08:00
|
|
|
#include "../utils/common.h"
|
2023-03-20 19:17:20 +08:00
|
|
|
|
|
|
|
/* 线性查找(数组) */
|
|
|
|
int linearSearchArray(int *nums, int len, int target) {
|
|
|
|
// 遍历数组
|
|
|
|
for (int i = 0; i < len; 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) */
|
2023-04-17 21:13:15 +08:00
|
|
|
ListNode *linearSearchLinkedList(ListNode *head, int target) {
|
2023-03-20 19:17:20 +08:00
|
|
|
// 遍历链表
|
|
|
|
while (head != NULL) {
|
2023-04-09 04:32:17 +08:00
|
|
|
// 找到目标节点,返回之
|
2023-03-20 19:17:20 +08:00
|
|
|
if (head->val == target)
|
|
|
|
return head;
|
|
|
|
head = head->next;
|
|
|
|
}
|
2023-04-09 04:32:17 +08:00
|
|
|
// 未找到目标节点,返回 NULL
|
2023-03-20 19:17:20 +08:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Driver Code */
|
|
|
|
int main() {
|
|
|
|
int target = 3;
|
|
|
|
|
|
|
|
/* 在数组中执行线性查找 */
|
2023-04-17 21:13:15 +08:00
|
|
|
int nums[10] = {1, 5, 3, 2, 4, 7, 5, 9, 10, 8};
|
2023-03-20 19:17:20 +08:00
|
|
|
int index = linearSearchArray(nums, 10, target);
|
|
|
|
printf("目标元素 3 的索引 = %d\n", index);
|
|
|
|
|
|
|
|
/* 在链表中执行线性查找 */
|
2023-04-17 21:13:15 +08:00
|
|
|
ListNode *head = arrToLinkedList(nums, 10);
|
|
|
|
ListNode *node = linearSearchLinkedList(head, target);
|
|
|
|
if (node == NULL) {
|
2023-04-09 04:32:17 +08:00
|
|
|
printf("目标节点值 3 的对应节点对象为 NULL\n");
|
2023-03-20 19:17:20 +08:00
|
|
|
} else {
|
2023-04-09 04:32:17 +08:00
|
|
|
printf("目标节点值 3 的对应节点对象为 addr: %p val: %d\n", node, node->val);
|
2023-03-20 19:17:20 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|