1) how to connect c to database.....
2) how to connect C++ to Database......


Reply me its urgent.

"How to connect" is going to depend on what kind of database you are using. Is there a specific database you must connect to, or are you able to choose your own?

ODBC is the way to go if you want a program to be able to connect to a variety of SQL-compliant databases, such as Access, MySQL, Oracle, Sybase, etc. etc. See the links that Narue posted. But if you have a specific database in mind then you might get better and faster results by using database-specific API, such as Microsoft's ADO or MySQL API.

You will have a lot more options if you moved to c++, such as MySQL++ for MySQL database.