LinkList Operation

链表典型数据结构：

#define ElemType int
typedef struct LinkNode{
    ElemType value;
    struct LinkNode* next;
};

相比于顺序结构，链式存储结构好处在于在任意位置插入或者删除元素，操作时间比较短。 1 节点回收以及申请

    注意指针和节点的关系，防止产生游离节点。记住不管是节点内容以及指针一定要初始化

LinkList Create_Linkist(int elem){
   LinkList head;
   head = (LinkList)malloc(sizeof(LinkNode));
   if(!head) exit(EXIT_FAILURE);
   head->value = elem;
   head->next = NULL;
   return head;
}

假设head指针指向第一个元素，那么插入元素时

无序插入表头插入

void Insert_Head(LinkList head, int elem){
    if(!head) head = Create_Linkist(elem);
    else{
      LinkList temp = Create_Linkist(elem);
      temp->next = head->next;
      head->next = temp;
    }
}

无序插入表尾插入 (q 为表尾指针)

void Insert_Tail(LinkList &head, int elem){
    if(!head) head = Create_Linkist(elem);
    else{
        LinkList temp = head;

        while(temp->next) temp = temp->next;
            temp->next = Create_Linkist(elem);;
    }
}

有序插入操作递归实现

void InsertSorted(LinkList &head, int elem){
    if(head == NULL || head->value >= elem){
        LinkList temp = Create_Linkist(elem);
        temp->next = head;
        head = temp;
    }
    else InsertSorted(head->next, elem);
}

打印函数

void print(LinkList head){
    while(head){
        cout<<head->value<<" ";
        head = head->next;
    }
}

源代码：

#include <iostream>
#include <stdlib.h>
using namespace std;

#define ElemType int
typedef struct LinkNode{
    ElemType value;
    struct LinkNode* next;
}*LinkList;

LinkList Create_Linkist(int elem){
   LinkList head;
   head = (LinkList)malloc(sizeof(LinkNode));
   if(!head) exit(EXIT_FAILURE);
   head->value = elem;
   head->next = NULL;
   return head;
}

void Insert_Head(LinkList head, int elem){
    if(!head) head = Create_Linkist(elem);
    else{
      LinkList temp = Create_Linkist(elem);
      temp->next = head->next;
      head->next = temp;
    }
}

void Insert_Tail(LinkList &head, int elem){
    if(!head) head = Create_Linkist(elem);
    else{
        LinkList temp = head;

        while(temp->next) temp = temp->next;
            temp->next = Create_Linkist(elem);;
    }
}

void InsertSorted(LinkList &head, int elem){
    if(head == NULL || head->value >= elem){
        LinkList temp = Create_Linkist(elem);
        temp->next = head;
        head = temp;
    }
    else InsertSorted(head->next, elem);
}

void print(LinkList head){
    while(head){
        cout<<head->value<<" ";
        head = head->next;
    }
}

int main()
{
    LinkList linkTest;
    int testNum;
    cout<<"enter test number: ";
    cin>>testNum;
    linkTest = Create_Linkist(testNum);
    print(linkTest);
    cout<<linkTest<<endl;
    InsertSorted(linkTest, --testNum);
    //Insert_Tail(linkTest, ++testNum);
    //Insert_Head(linkTest, ++testNum);
    cout<<"link after insert: "<<endl;
    print(linkTest);

    system("pause");
    return 0;}

    
        
         
            
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