就要完工了，，，可修改模块  没起到修改的作用 ，，，还望各路大虾 帮忙啊~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

下面是已有的修改模块  具体见附件
/*定义修改数据的学生学籍管理系统的函数*/
void modify()
{
    int k=0;
    long offset;
    char numkey[15];
    struct person one ;
    printf("\nPlease enter the number you want to modify school students：");
    scanf("%s",numkey);

    if((fp=fopen("student.txt","r+"))==NULL)
    {
        printf("\nCan not establish a Student Information Management System");
        exit(0);
    }
    rewind(fp);
    while(!feof(fp))
    {    offset=ftell(fp);
        fscanf(fp,"%s%s%s%s%s%s%s%s",one.name,one.st_num,one.sex,one.born_ym,one.major,one.class_num,one.address,one.hostelnum);
        if(!strcmp(numkey,one.st_num))
        {
            printf("\n\nHas been found, record：");
            printf("\n\nname      st_num     sex      born_ym     major      class      address    hostelnum\n");
            printf("%-10s%-10s%-10s%-10s%-10s%-10s%-10s%-10sn",one.name,one.st_num,one.sex,one.born_ym,one.major,one.class_num,one.address,one.hostelnum);
            k=1;
        }
    }

    if(k)
    {


            printf("\nPlease enter a new student record:\n");
            scanf("%s%s%s%s%s%s%s",one.st_num,one.sex,one.born_ym,one.major,one.class_num,one.address,one.hostelnum);
            fseek(fp,offset,SEEK_SET);
            fprintf(fp,"%-10s%-10s%-10s%-10s%-10s%-10s%-10s%-10sn",one.name,one.st_num,one.sex,one.born_ym,one.major,one.class_num,one.address,one.hostelnum);
    }
    else
        printf("\nSorry, no records。");
    fclose(fp);
    system("cls");
}

[ 本帖最后由 zdoublehang 于 2010-6-6 17:04 编辑 ]

大家都下下来看看撒~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

大虾啊。。。。。。。

神仙呐！！！！！

上苍呐~

感谢分享下了看看

出现问题的原因是,你输出到文件的每一条记录的长度是不一样的

你可以把他们全读出来写到另一个文件