#include <iostream.h>
#include <stdlib.h>
#include <math.h>
#include <windows.h>


void main(int argc, char *argv[])
{
	unsigned int  size, i;
	double   x=0, y;

	size = ((argc>1) && (size=atoi(argv[1]))) ? size : 2560000;

	cout<<"Computing squared x "<<size<<" times\n";

	cout<<"pow(x, 2): ";
	DWORD runtime = GetTickCount();
	for(i=0;i<size;i++){
		x += 0.00000000000000001;
		y = pow(x, 2);
	}
	runtime = GetTickCount() - runtime;
	cout<<"runtime is "<<runtime<<" msec\n";

	cout<<"     x*x: ";
	runtime = GetTickCount();
	for(i=0;i<size;i++){
		x += 0.00000000000000001;
		y = x*x;
	}
	runtime = GetTickCount() - runtime;
	cout<<"runtime is "<<runtime<<" msec\n\n";

	y = 0;
	cout<<"      x*x+y*y: ";
	runtime = GetTickCount();
	for(i=0;i<size;i++){
		x += 0.00000000000000001;
		y += 0.00000000000000002;
		y = x*x + y*y;
	}
	runtime = GetTickCount() - runtime;
	cout<<"runtime is "<<runtime<<" msec\n";
	y = 0;
	cout<<"sqrt(x*x+y*y): ";
	runtime = GetTickCount();
	for(i=0;i<size;i++){
		x += 0.00000000000000001;
		y += 0.00000000000000002;
		y = sqrt(x*x + y*y);
	}
	runtime = GetTickCount() - runtime;
	cout<<"runtime is "<<runtime<<" msec\n";

}