#include <stdio.h>#include <stdlib.h>#include <sys/times.h>#include <unistd.h>#include "kiss_fft.h"#include "pstats.h"int main(int argc,char ** argv){    int nfft=1024;    int isinverse=0;    int numffts=1000,i;    kiss_fft_cpx * buf;    kiss_fft_cpx * bufout;    kiss_fft_cfg st;    while (1) {      int c = getopt (argc, argv, "n:ix:");      if (c == -1)        break;      switch (c) {      case 'n':        nfft = atoi (optarg);        break;      case 'x':        numffts = atoi (optarg);        break;      case 'i':        isinverse = 1;        break;      }    }    buf=(kiss_fft_cpx*)malloc(sizeof(kiss_fft_cpx) * nfft);    bufout=(kiss_fft_cpx*)malloc(sizeof(kiss_fft_cpx) * nfft);    for (i=0;i<nfft;++i ) {        buf[i].r = rand() - RAND_MAX/2;        buf[i].i = rand() - RAND_MAX/2;    }    pstats_init();    st = kiss_fft_alloc( nfft ,isinverse ,0,0);    for (i=0;i<numffts;++i)        kiss_fft( st ,buf,bufout );    free(st);    free(buf); free(bufout);    fprintf(stderr,"KISS\tnfft=%d\tnumffts=%d\n" ,nfft,numffts);    pstats_report();    return 0;}