#include "stdafx.h"

#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include "malloc.h"
#define NULL 0
#define LEN sizeof(struct student)
struct student
{
    long num;
    float score;
    struct student *next;
};

int main(int argc, char* argv[])
{
    struct student a,b,c,*head,*p;//如何查找b的前一个结点a,b的后一个结点c;按照下标值查找
    a.num=99101;a.score=89.5;
    b.num=99103;b.score=90;
    c.num=99105;c.score=91.5;
    head=&a;
    a.next=&b;
    b.next=&c;
    c.next=NULL;
    p=head;
    do
    {
        printf("%ld%5.1f\n",p->num,p->score);
        p=p->next;
    }while(p!=NULL);
    return 0;
}

#include "stdafx.h"#include "stdio.h"#include "string.h"#include "stdlib.h"#include "malloc.h"#define NULL 0#define LEN sizeof(struct student)struct student {    long num;    float score;    struct student *next;};int main(int argc, char* argv[]){    struct student a,b,c,*head,*p,*q;    a.num=99101;a.score=89.5;    b.num=99103;b.score=90;    c.num=99105;c.score=91.5;    head=&a;    a.next=&b;    b.next=&c;    c.next=NULL;    p=head;    do    {        printf("%ld%5.1f\n",p->num,p->score);        p=p->next;    }while(p!=NULL);    q=p->next.    while(q!=NULL&&q!=&b)    {          p=q;        q=q->next;    }    if(q==NULL)    {         return 0;    }    else    {            return p;    }     return 0;}

#include "stdafx.h"
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include "malloc.h"
#define NULL 0
#define LEN sizeof(struct student)
struct student
{
    long num;
    float score;
    struct student *next;
};

int main(int argc, char* argv[])
{
    struct student a,b,c,*head,*p,*q;
    a.num=99101;a.score=89.5;
    b.num=99103;b.score=90;
    c.num=99105;c.score=91.5;
    head=&a;
    a.next=&b;
    b.next=&c;
    c.next=NULL;
    p=head;
    do
    {
        printf("%ld%5.1f\n",p->num,p->score);
        p=p->next;
    }while(p!=NULL);

    q=p->next.
    while(q!=NULL&&q!=&b)
    {  
        p=q;
        q=q->next;
    }
    if(q==NULL)
    {
         return 0;
    }
    else
    {   
        return p;
    }
    return 0;
}

程序还是运行不了
#include "stdafx.h"
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include "malloc.h"
#define NULL 0
#define LEN sizeof(struct student)
struct student
{
    long num;
    float score;
    struct student *next;
};

int main(int argc, char* argv[])
{
    struct student a,b,c,*head,*p,*q;
    a.num=99101;a.score=89.5;
    b.num=99103;b.score=90;
    c.num=99105;c.score=91.5;
    head=&a;
    a.next=&b;
    b.next=&c;
    c.next=NULL;
    p=head;
    do
    {
        printf("%ld%5.1f\n",p->num,p->score);
        p=p->next;
    }while(p!=NULL);

    q=p->next;
    while(q!=NULL&&q!=&b)
    {  
        p=q;
        q=q->next;
    }
    if(q==NULL)
    {
         return 0;
    }
    else
    {   
         return 1;
    }
    return 0;
}

那该如何修改代码呢？

这样做还是不行，只能够查找出一个结点，有没有其他的做法？