* * Copyright (c) 1997-1999 Massachusetts Institute of Technology * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * c Simple program to demonstrate calling the wrapper routines c to perform 1D transforms in Fortran. This program should be c linked with -lfftw -lm. program test implicit none #include "fftw_f77.i" integer N parameter(N=4) double complex in, out dimension in(N),out(N) integer i integer plan write(*,*) 'Input array:' do i = 1,N,1 in(i) = dcmplx(float(i),float(i+1)) write(*,*) ' in(',i,') = ',in(i) enddo call fftw_f77_create_plan(plan,N,FFTW_FORWARD,FFTW_ESTIMATE) call fftw_f77(plan,1,in,1,0,out,1,0) write(*,*) 'Output array:' do i = 1,N,1 write(*,*) ' out(',i,') = ',out(i) enddo call fftw_f77_destroy_plan(plan) call fftw_f77_create_plan(plan,N,FFTW_BACKWARD,FFTW_ESTIMATE) call fftw_f77(plan,1,out,1,0,in,1,0) write(*,*) 'Output array after inverse FFT:' do i = 1,N,1 write(*,*) ' ',N,' * in(',i,') = ',in(i) enddo call fftw_f77_destroy_plan(plan) end

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