Include libcob.h in your C program. 
Call cob_init before using any COBOL module:
     #include <libcob.h>
     
     int
     main(int argc, char **argv)
     {
       /* initialize your program */
       ...
     
       /* initialize the COBOL run-time library */
       cob_init(argc, argv);
     
       /* rest of your program */
       ...
     }
     
   You can write cobc_init(0, NULL); if you do not want to pass
command line arguments to COBOL.
   
The function cob_set_library_path will overwrite the user
setting of the environment variable COB_LIBRARY_PATH.
   
You can compile your C program as follows:
     cc -c `cob-config --cflags` main.c
     
   The compiled object must be linked with libcob as follows:
     cc -o main main.o `cob-config --libs`