How can I design database for college management system in c?
The question is not clear, you want to design a database management system and build it in c/c++ or you want to design database tables and use c/c++ to access those tables? If you want to build dbms itself, you are wasting your precious time and reinventing the wheel. If you want to design database tables, follow ER model. Identify entities and relationship, convert that into tables and create in database.