明天答辩，求大佬指点，能不能给我讲一下这个程序，那些指针都是怎么回事啊？

Question

#include <stdio.h>#include <stdlib.h>typedef struct Node{    int data;//定义元素类型为整型    struct Node *next;}LNode,*LinkList;//建立链表结构体int length_C=0; //定义c初始长度为零 void InitLNode(LNode* pHeader,int len){//初始化链表     int i;     LNode *pNewNode;    LNode *pCurNode;    pHeader->next=pNewNode;    pCurNode = pHeader;     for(i=0;i<len;i++)    {        pNewNode = (LNode*)malloc(sizeof(LNode));        scanf("%d",&pNewNode->data);        pNewNode->next = NULL;        pCurNode->next = pNewNode;        pCurNode = pNewNode;    }} LNode* InterSet(LNode *p1,LNode *p2,LNode *C){        LNode *pCurNode1 = p1;        LNode *pCurNode2 = p2;        LNode *pCurNode3 = C;         LNode *pNewNode3;         C->next = pNewNode3;         while(pCurNode1->next!=NULL)        {            pCurNode1=pCurNode1->next;             while(pCurNode2->next!=NULL)            {                  pCurNode2=pCurNode2->next;                 if(pCurNode1->data == pCurNode2->data)                    {                       pNewNode3 = (LNode*)malloc(sizeof(LNode));                        length_C++;                        pNewNode3->data  = pCurNode1->data;                       pNewNode3->next = NULL;                       pCurNode3->next = pNewNode3;                       pCurNode3=pNewNode3;                     }            }            pCurNode2 = p2;        }      pCurNode3 = C;       return C;}void Display(LNode *pHeader){    if(length_C!=0)    {        LNode *pCurNode;        pCurNode=pHeader;        while(pCurNode->next!=NULL)        {            pCurNode = pCurNode->next;            printf("%d ",pCurNode->data);        }    } }int main(){    LNode *A;    LNode *B;    LNode *C;     int length_A,length_B ; //定义AB的长度    A = (LNode*)malloc(sizeof(LNode));    B = (LNode*)malloc(sizeof(LNode));    C = (LNode*)malloc(sizeof(LNode)); //开辟三个存储空间    printf("请输入A的长度及A的元素");    scanf("%d",&length_A);    InitLNode(A,length_A);     printf("请输入B的长度及B的元素");    scanf("%d",&length_B);    InitLNode(B,length_B);      InterSet(A,B,C);//进行交集运算，存储到链表C      Display(C);    return 0;}