好了，虽然文件里存储的信息有问题，但是在程序中输出结果是没问题的

那如何让wb以二进制形式写入呢

如何让wb以二进制形式写入

表述可能不清楚， fp=fopen("E:\\cdata.txt","wb")  //建立一个新的二进制文件， 那就用fwrite(),fread()写读
        fp=fopen("E:\\cdata.txt","w")   //建立一个新的文本文件， 用fputs() , fgets() 写读

我也遇到过这种乱码的问题，我后来改了一下，就可以了，我把那一块的函数给你贴上
int input_stu_xinxi()

{    /*************

    int flag = 1;

    while (flag)

    {

    struct stu students;

    FILE *fp;

    errno_t err= (fopen_s(&fp, "F:\stuinfo.txt", "w"));

    if (err!= 0)

    {

    printf("文件打开错误\n");

    exit(0);

    }

    if (fwrite(&students, sizeof(struct stu), 1, fp)!=1)

    {

    printf("\n file write error \n");

    }



    文件的写还需要完善

    printf("\t学号:");

    scanf("%s", students.stu_no);

    fputs(students.stu_no,fp);

    printf("\t姓名:");

    scanf("%s", students.name);

    fputs(students.name, fp);

    printf("\t年龄:");

    scanf("%s", students.age);

    fputs(students.age, fp);

    printf("\t性别:");

    scanf("%s", students.sex);

    fputs(students.sex, fp);

    printf("\t出生年月:");

    scanf("%s", students.birth_date);

    fputs(students.birth_date, fp);

    printf("\t地址:");

    scanf("%s", students.address);

    fputs(students.address, fp);

    printf("\t电话:");

    scanf("%s", students.phone);

    fputs(students.phone, fp);

    printf("\t邮件:");

    scanf("%s", students.email);

    fputs(students.email, fp);

    printf("\n");

    fclose(fp);

    memset(&students,0x00,sizeof(struct stu));

    printf("继续输入请按1，返回上级菜单请按2，退出请安0\n");

    scanf_s("%d", &flag);

    if (flag == 0)

    {

    exit(0);

    }

    if (flag == 1)

    {

    continue;

    }

    if (flag == 2)

    {

    menu();

    break;

    }

    }

    return 0;

    ******/

    FILE *fp;

    int i, m, flag = 1;

    printf("请输入等级学生信息的总人数：");

    scanf_s("%d", &m);

    while (flag)

    {

        fp = fopen("F:\stuinfo.txt", "w");

        //errno_t err = (fopen_s(&fp, "F:\stuinfo.txt", "w"));

        if (fp == 0)

        {

            printf("文件打开错误\n");

            exit(0);

        }

        /****

        if (fwrite(&students[i], sizeof(struct stu), 1, fp) != 1)

        {

        printf("\n file write error \n");s

        }

        ****/

        for (i = 0; i < m; i++)

        {

            printf("学号：");

            scanf("%s", &students[i].stu_no);

            fputs(students[i].stu_no, fp);

            fputs("\t", fp);



            printf("姓名：");

            scanf("%s", &students[i].name);

            fputs(students[i].name, fp);

            fputs("\t", fp);



            printf("年龄：");

            scanf("%s", &students[i].age);

            fputs(students[i].age, fp);

            fputs("\t", fp);



            printf("性别：");

            scanf("%s", &students[i].sex);

            fputs(students[i].sex, fp);

            fputs("\t", fp);



            printf("出生年月：");

            scanf("%s", &students[i].birth_date);

            fputs(students[i].birth_date, fp);

            fputs("\t", fp);



            printf("地址：");

            scanf("%s", &students[i].address);

            fputs(students[i].address, fp);

            fputs("\t", fp);



            printf("电话：");

            scanf("%s", &students[i].phone);

            fputs(students[i].phone, fp);

            fputs("\t", fp);



            printf("邮件：");

            scanf("%s", &students[i].email);

            fputs(students[i].email, fp);

            fputs("\n", fp);

        }

        fclose(fp);

        printf("继续输入请按1，返回上级菜单请按2，退出请安0\n");

        scanf_s("%d", &flag);

        if (flag == 0)

        {

            exit(0);

        }

        if (flag == 1)

        {

            continue;

        }

        if (flag == 2)

        {

            menu();

            break;

        }

    }

    return 0;

}

你看到fclose(fp)就可以了

你看到fclose(fp)就可以了