TC: void fnmerge( char *path, const char *drive,
const char *dir, const char *name, const char *ext)
- prototype in dir.h
- makes a file name (path) from drive, dir, name, and ext
- dir can include subdirectories
- maximum sizes for these strings are:
MAXPATH 80 path
MAXDRIVE 3 drive - includes colon (:)
MAXDIR 66 dir - includes leading/trailing backslashes
MAXFILE 9 name
MAXEXT 5 ext, including leading dot (.)
- invertible with fnsplit()