The API for all conversions requires inclusion of the c8conversions.h header file.
Include the c8conversions.h header as follows:
#include "c8conversions.h"
The actual code to convert the data types is in a shared object library (".so") file on most UNIX-like operating systems or a Dynamic Link Library (".dll") file on Microsoft Windows systems. When you compile and link your code, include the appropriate library as part of the link command.