单链表的思考
我首先用list实现一个单链表
class nodes { private string value; private nodes node; string result = ""; public nodes(string value):this(value,null) { this.value = value; } public nodes(string value,nodes node) { this.value = value; this.node = node; } public override string ToString() { return value.ToString()+(node==null?"":node.ToString()); } } static void Main(string[] args) { //单链表 nodes n1 = new nodes("1"); nodes n2 = new nodes("2", n1); nodes n3 = new nodes("3", n2); Console.WriteLine(n3); Console.ReadKey(); }
结果:321 ok
当然我们也可以用范型!将Node改为Node<T>即可, nodes n1 = new nodes("1");也改为 nodes<char> n1 = new nodes<char>("1");
现在的问题是:上面的代码我只能传同一种类型的值,要是我想传不同类型的值改怎么办呢!
显然我们可以通过 ,private object value;将所有输入的值都设成object类型。
这种方法可以,但是难免会带来不断的装箱和拆箱!
internal class baseNode { protected baseNode bNode; public baseNode(baseNode bNode) { this.bNode = bNode; } } class childNode<T>:baseNode { T value; public childNode(T value):this(value,null){} public childNode(T value,baseNode bnode): base(bnode) { this.value = value; } public override string ToString() { return value + ( bNode== null ? "" : bNode.ToString()); } }
两种实现方法:
//单链表 childNode<string> n1 = new childNode<string>("1"); childNode<string> n2 = new childNode<string>("2", n1); childNode<int> n3 = new childNode<int>(3, n2); baseNode head = new childNode<string>("1"); head = new childNode<string>("2",head); head = new childNode<int>(3,head); Console.WriteLine(n3); Console.WriteLine(head);