*     E01BEF Example Program Text
*     Mark 14 Revised. NAG Copyright 1989.
*     .. Parameters ..
      INTEGER          NIN, NOUT
      PARAMETER        (NIN=5,NOUT=6)
      INTEGER          MMAX, NMAX
      PARAMETER        (MMAX=50,NMAX=50)
*     .. Local Scalars ..
      DOUBLE PRECISION STEP
      INTEGER          I, IFAIL, M, N, R
*     .. Local Arrays ..
      DOUBLE PRECISION D(NMAX), F(NMAX), PF(MMAX), PX(MMAX), X(NMAX)
*     .. External Subroutines ..
      EXTERNAL         E01BEF, E01BFF
*     .. Intrinsic Functions ..
      INTRINSIC        MIN
*     .. Executable Statements ..
      WRITE (NOUT,*) 'E01BEF Example Program Results'
*     Skip heading in data file
      READ (NIN,*)
      READ (NIN,*) N
      IF (N.GT.0 .AND. N.LE.NMAX) THEN
         DO 20 R = 1, N
            READ (NIN,*) X(R), F(R)
   20    CONTINUE
         IFAIL = 1
*
         CALL E01BEF(N,X,F,D,IFAIL)
*
         READ (NIN,*) M
         IF (IFAIL.EQ.0 .AND. M.GT.0 .AND. M.LE.MMAX) THEN
*           Compute M equally spaced points from X(1) to X(N).
            STEP = (X(N)-X(1))/(M-1)
            DO 40 I = 1, M
               PX(I) = MIN(X(1)+(I-1)*STEP,X(N))
   40       CONTINUE
            IFAIL = 0
*
            CALL E01BFF(N,X,F,D,M,PX,PF,IFAIL)
*
            WRITE (NOUT,*)
            WRITE (NOUT,*) '                Interpolated'
            WRITE (NOUT,*) '     Abscissa          Value'
            DO 60 I = 1, M
               WRITE (NOUT,99999) PX(I), PF(I)
   60       CONTINUE
         ELSE
            WRITE (NOUT,99998) IFAIL
         END IF
      END IF
*
99999 FORMAT (1X,F13.4,2X,F13.4)
99998 FORMAT (1X,' ** E01BEF returned with IFAIL = ',I5)
      END