#include <stdio.h>/* need these for getrusage version of get_time#include <sys/time.h>#include <sys/resource.h>#include <unistd.h>*//* need for times() version of get_time#include <sys/times.h>#include <unistd.h>*/// for get_time_of_day#include <sys/time.h>double get_time(void)//some code taken from Victor Shoup's NTL library{    /*    //getrusage() version    struct rusage used;    getrusage(RUSAGE_SELF, &used);    return (used.ru_utime.tv_sec + used.ru_stime.tv_sec +	(used.ru_utime.tv_usec + used.ru_stime.tv_usec) / 1e6);    */    /* times() version    static clock_t last_clock = 0;    static double acc = 0;    struct tms used;    clock_t this_clock;    double delta;    times(&used);    this_clock = used.tms_utime + used.tms_stime;    if (last_clock == 0) {	delta = 0;    } else {	delta = (this_clock - last_clock)/((double)sysconf(_SC_CLK_TCK));	if (delta < 0) delta = 0;    }    acc += delta;    last_clock = this_clock;    return acc;    */    static struct timeval last_tv, tv;    static int first = 1;    static double res = 0;    if (first) {	gettimeofday(&last_tv, NULL);	first = 0;	return 0;    } else {	gettimeofday(&tv, NULL);	res += tv.tv_sec - last_tv.tv_sec;	res += (tv.tv_usec - last_tv.tv_usec) / 1000000.0;	last_tv = tv;	return res;    }}