为n个同学建立一个通讯录，包括学号、姓名、年龄、电话、寝室等个人信息，能够按照某些关键信息（例如学号、姓名）进行查询、排序、分类并将显示结果-For the students to build a n-contacts, including the student number, name, age, telephone, bedroom and other personal information to in accordance with certain key information (s