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

using namespace std;

int f(const char *c)
{
	int i; 
	int res =  0 ; 
	for (i= 1 ; i<= 8 ; i++) {
		res += pow( 2 , ( 8 -i))* (c[i- 1 ] - '0');
	}
	return res;
}

int f1(const char *c)
{
	int r =  0 ;
	for(; *c ; c++)
	{
		r <<=  1 ;
		r += (*c == '0') ?  0  :  1 ;
	}
	return r;
}

void Test(const char *c, int N)
{
	DWORD dw = GetTickCount();
	for(int i =  0 ; i < N; i++)
		f(c);
	cout << "power and mul conversion " << (GetTickCount() - dw) << " msec \n";

	dw = GetTickCount();
	for(int i =  0 ; i < N; i++)
		f1(c);
	cout << "shift and add conversion " << (GetTickCount() - dw) << " msec \n";

	dw = GetTickCount();
	for(int i =  0 ; i < N; i++)
		strtol(c,  0 ,  2 );
	cout << "strtol conversion " << (GetTickCount() - dw) << " msec \n";
}

int main(int argc, char *argv[])
{
	char c[ 9 ] = "10001010";
	Test(c,  1000000 );
	return  0 ;
}