character(len=CALCEPH_MAX_CONSTANTVALUE, kind=C_CHAR) UNIT
TYPE(C_PTR) :: peph
peph = calceph_open("example1.dat"//C_NULL_CHAR)
if (C_ASSOCIATED(peph)) then
! print the value of UNIT
if (calceph_getconstantss(peph, "UNIT"//C_NULL_CHAR, UNIT).eq.1) then
write (*,*) "UNIT=", trim(UNIT)
endif
call calceph_close(peph)
endif