文件操作 可以编写学生姓名，性别，年龄，家庭住址，电话，电子邮件，爱好等。 再以上基础上进行该文件的保存，修改和打开显示。 -File operations can write student name, gender, age, home address, telephone, email, hobbies and so on. Based on the above and then save the file, modify, and open the display.