#include <stdio.h>
#include <sys/resource.h> 
#include <stdlib.h>

#define CLOCKS_PER_SEC 1000000
#include <sys/time.h> //for gettimeofday

int v1(void)
{
    char holder[2048];
    for (int i=0; i<1000000; i++)
    {
	for (int j=0; j<2048; j++)
	{
	    holder[j]=j;
	}
    }
}

int v2(void)
{
    char holder[2048];
    char * p;
    for (int i=0; i<1000000; i++)
    {
	p=holder;
	for (int j=0; j<2048; j++)
	{
	    *(p++)=j;
	}
    }
}


double t2d()
{
    struct rusage buf; 
    getrusage(RUSAGE_SELF, &buf);
    return (double)(buf.ru_utime.tv_sec + (double) buf.ru_utime.tv_usec / (double) CLOCKS_PER_SEC); 
}

float part1(int whch)
{
	double startt=t2d();
	switch (whch)
	{
	case 1:
	    v1();
	    break;
	default:
	    v2();
	    break;
	}
	double endt=t2d();
	float interval=(float)(endt-startt);
	printf("Time: %10.6f\n", interval );
	return interval;
}

int main(int argc, char *argv[])
{
    int which  = (int)strtof(argv[1], NULL);
    part1(which);
}