unable to compile example program;

[Brian Gough]

Y. U. Sasidhar writes:
 > 2. How do I know which header file to include for a
 > given function and dependencies of the given function
 > on others.  The manual lists only function description
 > with return types etc. It does not mention header
 > files necessary and depedencies.

The header files are given at the beginning of the section
where the function is described.