Re: [Dev-C++] Re: newbie: trying to install FFTW library on XP

Are you compiling the code as C++?

In that case you should rewrite the lines like:
  in = (fftw_complex*)fftw_malloc(sizeof...
  out = (fftw_complex*)fftw_malloc(sizof...
to typecast from void* to the data type of the in and out variables.

In older standards, there was an automagic cast from void* to everything
but newer standards likes you to manually specify that you know what data
types you have and what data types you want.

/Per W

On Fri, 30 Jul 2004 jd...@st... wrote:

> Siva:
>
> Thanks for your help, and I did as you suggested, and tried compiling the
> tutorial code...but I'm getting an error I don't quite understand:
>
> invalid conversion from `void*' to `double (*)[2]'
>
> this appears at the two lines with fftw_malloc(lines starred in my code below)
> here's the exact code I'm trying to compile...and I already put the header in
> the include folder and linked the .lib file.  If you or anyone else had any
> ideas why this would happen, I'd appreciate it thanks.
>
> #include <stdlib.h>
> #include <fftw3.h>
>
> int main()
> {
>     int N = 256;
>     fftw_complex *in, *out;
>     fftw_plan p;
> *    in = fftw_malloc(sizeof(fftw_complex) * N);
> *    out = fftw_malloc(sizeof(fftw_complex) * N);
>     p = fftw_plan_dft_1d(N, in, out, FFTW_FORWARD, FFTW_ESTIMATE);
>     fftw_execute(p); /* repeat as needed */
>     fftw_destroy_plan(p);
>     fftw_free(in); fftw_free(out);
>     system("PAUSE");
>     return 0;
> }
>
>
>
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