/** * File: linear_search.swift * Created Time: 2023-01-28 * Author: nuomi1 (nuomi1@qq.com) */ import utils /* 線性查詢(陣列) */ func linearSearchArray(nums: [Int], target: Int) -> Int { // 走訪陣列 for i in nums.indices { // 找到目標元素,返回其索引 if nums[i] == target { return i } } // 未找到目標元素,返回 -1 return -1 } /* 線性查詢(鏈結串列) */ func linearSearchLinkedList(head: ListNode?, target: Int) -> ListNode? { var head = head // 走訪鏈結串列 while head != nil { // 找到目標節點,返回之 if head?.val == target { return head } head = head?.next } // 未找到目標節點,返回 null return nil } @main enum LinearSearch { /* Driver Code */ static func main() { let target = 3 /* 在陣列中執行線性查詢 */ let nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8] let index = linearSearchArray(nums: nums, target: target) print("目標元素 3 的索引 = \(index)") /* 在鏈結串列中執行線性查詢 */ let head = ListNode.arrToLinkedList(arr: nums) let node = linearSearchLinkedList(head: head, target: target) print("目標節點值 3 的對應節點物件為 \(node!)") } }