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完善所以c#相关的文档和代码
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using hello_algo.include;
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using NUnit.Framework;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace hello_algo.chapter_searching
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{
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public class hashing_search
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{
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/* 哈希查找(数组) */
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static int hashingSearch(Dictionary<int, int> map, int target)
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{
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// 哈希表的 key: 目标元素,value: 索引
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// 若哈希表中无此 key ,返回 -1
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return map.GetValueOrDefault(target, -1);
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}
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/* 哈希查找(链表) */
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static ListNode? hashingSearch1(Dictionary<int, ListNode> map, int target)
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{
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// 哈希表的 key: 目标结点值,value: 结点对象
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// 若哈希表中无此 key ,返回 null
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return map.GetValueOrDefault(target);
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}
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[Test]
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public void Test()
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{
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int target = 3;
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/* 哈希查找(数组) */
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int[] nums = { 1, 5, 3, 2, 4, 7, 5, 9, 10, 8 };
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// 初始化哈希表
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Dictionary<int, int> map = new();
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for (int i = 0; i < nums.Length; i++)
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{
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map[nums[i]] = i; // key: 元素,value: 索引
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}
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int index = hashingSearch(map, target);
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Console.WriteLine("目标元素 3 的索引 = " + index);
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/* 哈希查找(链表) */
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ListNode head = ListNode.ArrToLinkedList(nums);
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// 初始化哈希表
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Dictionary<int, ListNode> map1 = new();
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while (head != null)
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{
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map1[head.val] = head; // key: 结点值,value: 结点
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head = head.next;
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}
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ListNode? node = hashingSearch1(map1, target);
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Console.WriteLine("目标结点值 3 的对应结点对象为 " + node);
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}
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}
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}
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