ofstream file2("f2.csv");
	float xr = 0;
	float xim = 0;
	int k;
	for (k = 0; k < N - 1; k++)
	{
		xr = 0;
		xim = 0;
		for (n = 0; n < N - 1; n++)
		{
			xr = xr + (x[n] * cos((-2 * M_PI * k * n) / N));
			xim = xim + (x[n] * sin((-2 * M_PI * k * n) / N));
		}
		X_re.push_back(xr);
		X_im.push_back(xim);
		X.push_back(X_re[k] + X_im[k]);
		file2 << k << ";" << X[k] << endl;

	}
	file2.close();