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;
}

Answer 1

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Answer 2

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Answer 3

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Answer 4

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Answer 5

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Answer 6

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