Introduction - If you have any usage issues, please Google them yourself
		 
Experiment title:
Random access of data to the student
The experimental requirements:
1. The use of file processing knowledge in c++ and object-oriented principles to achieve a simple student information management system 
2. The basic features include: according to the existing document information and data to add, delete, change, check, illegal input (such as student id cannot be repeated, etc.), save to file information 
Article 3. Every data include: student id, name, special features.