#include <stdio.h>
#include "kiss_fftr.h"

int
main(int argc, char *argv[])
{
    kiss_fft_scalar time[] = {0, 0.5, 0, -0.5,
                              0, 0.5, 0, -0.5,
                              0, 0.5, 0, -0.5,
                              0, 0.5, 0, -0.5};
    const int nfft = sizeof(time) / sizeof(time[0]);
    const int nfreq = nfft / 2 + 1;
    kiss_fft_cpx freq[nfreq];
    kiss_fftr_cfg kiss_fftr_state = kiss_fftr_alloc(nfft, 0, 0, 0);

    kiss_fftr(kiss_fftr_state, time, freq);
    for (int i = 0; i < nfreq; ++i) {
        printf("%g %g\n", freq[i].r, freq[i].i);
    }
    free(kiss_fftr_state);

    return 0;
}