  It is expected that charmed particles will be copiously produced at Future
Circular Collider (FCC). Due to relatively large life-time of the particles, it
will be needed to account their interactions with surrounded materials and
detector's materials. In order to satisfy the requirements, charmed particle
production in soft interactions has been implemented in QGS and FTF models of
the Geant4 package. Some details of the implementations are considered in the
paper.
