typedef    struct    student
{    char    num[10];    double    s;    struct    student    *next;}list;
int    main(void)
{
    list    *p=NULL,*q=NULL,*head=NULL,temp={0};
    char    tempnum[10]="";
    FILE    *fp=NULL;
    fp=fopen("D:\\学生成绩.txt","r");
    if(fp==NULL)
    {
        printf("\n           打开文件失败!\n");
        exit(0);
    }
    q=head;
    p=head->next;
    printf("\n请输入需要删除的学号:\n");
    scanf("%s",&tempnum);
    while(feof(fp)==0)
        fscanf(fp,"%15s%15lf\n",&temp.num,&temp.s);
    while(p!=NULL)
        if(tempnum!=p->num)
        {
            q=q->next;
            p=p->next;
        }
        else
            break;
        q->next=p->next;
        free(p);
    printf("            学号        分数\n");
    while(feof(fp)==0)
    {
        printf("%15s%15lf\n%",temp.num,temp.s);
        fprintf(fp,"%15s%15lf\n",temp.num,temp.s);
    }
    fclose(fp);
    
}