同学之间的通讯记录，大一学生的C语言作业，可以添加学号、姓名、年龄、电话、邮箱、QQ号，具有添加、显示、查找、修改、删除、排序功能-Records of communication between the students, a student C language operations can add student ID, name, age, telephone, mail, QQ number, has add and disp