complex function cdotcf(n,cx,incx,cy,incy)

c

c     forms the dot product of two vectors, conjugating the first

c     vector.

c     jack dongarra, linpack,  3/11/78.

c     modified 12/3/93, array(1) declarations changed to array(*)

c

      complex cx(*),cy(*),ctemp

      integer i,incx,incy,ix,iy,n

c

      ctemp = (0.0,0.0)

      cdotcf = (0.0,0.0)

      if(n.le.0)return

      if(incx.eq.1.and.incy.eq.1)go to 20

c

c        code for unequal increments or equal increments

c          not equal to 1

c

      ix = 1

      iy = 1

      if(incx.lt.0)ix = (-n+1)*incx + 1

      if(incy.lt.0)iy = (-n+1)*incy + 1

      do 10 i = 1,n

        ctemp = ctemp + conjg(cx(ix))*cy(iy)

        ix = ix + incx

        iy = iy + incy

   10 continue

      cdotcf = ctemp

      return

c

c        code for both increments equal to 1

c

   20 do 30 i = 1,n

        ctemp = ctemp + conjg(cx(i))*cy(i)

   30 continue

      cdotcf = ctemp

      return

      end