What does one need to have to use Pro*C?

First, we have to install Pro*C software. At the time of installing Oracle, make sure you select Pro*C components. You can check whether your installation of Oracle has Pro*C components installed by examining PRECOMP directory of Oracle home.

$ORACLE_HOME/precomp

admin/ - Contains configuration files.
doc/ - Documentation related to Precompilers.
lib/ - Contains the libraries used by language linker.
mesg/ - It contains message files.
public/ - Contains the required header (.h) files.