链表上的编译器错误 [英] Compiler Error On Linked List

问题描述

我在链表上写了以下代码:

using System;
using System.Collections;
using System.Collections.Generic;
//using System.Collections.ObjectModel;
//using System.Text;

class MainClass
{
    static void Main()
    {
         LinkedList<int> list = new LinkedList<int>();
        
        list.AddFirst(10);
        list.AddLast(15);
        list.AddLast(3);
        list.AddLast(99);
        list.AddBefore(list.Last, 25);

        LinkedListNode<int> node = list.First;
        while (node != null)
        {
            Console.WriteLine(node.Value);
            node = node.Next;
        }
    }
}

每当我尝试编译它时，都会出现以下错误:

错误1找不到类型或名称空间名称"LinkedList"(您是否缺少using指令或程序集引用?)

错误2找不到类型或名称空间名称"LinkedList"(您是否缺少using指令或程序集引用?)

错误3找不到类型或名称空间名称"LinkedListNode"(您是否缺少using指令或程序集引用?)


注意:我正在使用Microsoft Visual C#2008 Express Edition.

解决方案

检查您的引用.查看是否缺少对System的引用.

(在解决方案资源管理器的右侧，项目下方应是一个名为参考"的节点，如果此列表中缺少系统"，请右键单击并选择添加参考".)

我复制了您的代码，并且在我的PC上完全可以正常工作.如果我得到了您提到的3个编译器警告，但是删除了系统引用.

LinkedList是泛型类型，则需要为其提供类型参数.像这样:

LinkedList<int> list = new LinkedList<int>();

我忘了输入.
会是
LinkedList< int> list = new LinkedList< int>();

I have written the following code on Linked List :

using System;
using System.Collections;
using System.Collections.Generic;
//using System.Collections.ObjectModel;
//using System.Text;

class MainClass
{
    static void Main()
    {
         LinkedList<int> list = new LinkedList<int>();
        
        list.AddFirst(10);
        list.AddLast(15);
        list.AddLast(3);
        list.AddLast(99);
        list.AddBefore(list.Last, 25);

        LinkedListNode<int> node = list.First;
        while (node != null)
        {
            Console.WriteLine(node.Value);
            node = node.Next;
        }
    }
}

Whenever I am tring to compile it I am getting the following error:

Error 1 The type or namespace name ''LinkedList'' could not be found (are you missing a using directive or an assembly reference?)

Error 2 The type or namespace name ''LinkedList'' could not be found (are you missing a using directive or an assembly reference?)

Error 3 The type or namespace name ''LinkedListNode'' could not be found (are you missing a using directive or an assembly reference?)


NOTE: I am using Microsoft Visual C# 2008 Express Edition.

解决方案

Check your references. See if you are missing a reference to System.

(On the right hand side, in Solution Explorer, underneath your project should be a node called "References", if "System" is missing from this list, right click and select "Add Reference".)

I copied your code and it works totally fine on my PC. If I delete the System reference though I get the 3 compiler warnings you mentioned.

LinkedList is a generic type, you need to provide it with a type parameter. Like this:

LinkedList<int> list = new LinkedList<int>();

The same for LinkedListNode.

I forget to type.
It will be
LinkedList<int> list = new LinkedList<int>();

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