程序代码：

#include<stdio.h>
#include<stdlib.h>
typedef struct student
{
    int xuehao;
    char name[4];
    int point1;
    int point2;
    int point3;
    struct student *next;
}Linklists;
main()
{
    void input(Linklists *head);
    void print(Linklists *head);
    void max(Linklists *head);
    Linklists *head;
    head=(Linklists*)malloc(sizeof(Linklists));
    head->next=NULL;
    input(head);
    print(head);
    max(head);
    return 0;
}
void input(Linklists *head)
{
    Linklists *p;
    printf("请依次输入学号，姓名，各科成绩(学号输入00时结束):\n");
        while(1)
        {
            p=(Linklists*)malloc(sizeof(Linklists));
            scanf("%d",&p->xuehao);
            if(p->xuehao==00)
            {
                free(p);
                break;
            }
            scanf("%s %d %d %d",p->name,&p->point1,&p->point2,&p->point3);
            p->next=head->next;
            head->next=p;
        }
}
void print(Linklists *head)
{
    Linklists *p;
    p=head->next;
        printf("\n学号------姓名-------第一科成绩----第二科成绩----第三科成绩\n");
        while(p!=NULL)
        {
            printf("%d %s %d %d %d\n",p->xuehao,p->name,p->point1,p->point2,p->point3);
            p=p->next;
        }
}
void max(Linklists *head)
{
    Linklists *p=head->next;
    int maxpoint,temp,maxxuehao;
    maxxuehao=head->xuehao;
    printf("最高分的同学的成绩如下：");
    printf("\n学号------姓名-------第一科成绩----第二科成绩----第三科成绩\n");
    while(p!=NULL)
    {
        maxpoint=p->point1+p->point2+p->point3;
        p=p->next;
        temp=p->point1+p->point2+p->point3;
        if(maxpoint<temp)
        {
            maxxuehao=p->xuehao;
            maxpoint=temp;
        }
    }
    p=head->next;
    while(p!=NULL)
    {
        if(maxxuehao==p->xuehao)
        printf("%d %s %d %d %d\n",p->xuehao,p->name,p->point1,p->point2,p->point3);
        else
        p=p->next;
    }
}

程序代码：

void max(Linklists *head) // 应该加 const，懒得改之前的代码了
{
    printf("最高分的同学的成绩如下：\n");
    printf("学号------姓名-------第一科成绩----第二科成绩----第三科成绩\n");

    const Linklists* pmax = NULL;
    int maxpoint;
    for( const Linklists* p=head->next; p; p=p->next )
    {
        int temp = p->point1 + p->point2 + p->point3;
        if( !pmax || maxpoint<temp )
        {
            pmax = p;
            maxpoint = temp;
        }
    }

    if( pmax )
        printf( "%d %s %d %d %d\n", pmax->xuehao, pmax->name, pmax->point1, pmax->point2, pmax->point3 );
}