string round(string number)
{
	int n = 5;				// dokładność po przecinku
	int i = 0;
	while (number[i] != ',')
		i++;
	i += n;
	int m = i + 1;
	if (number[i + 1] >= '5')
	{
		bool loop = true;
		while (loop)
		{
			if (number[i] == ',')
				i--;
			if (i == 0)
			{
				number.insert(0, "1");
				return number.substr(0, m);
			}
			else
				number[i]++;
			loop = false;
			if (number[i] > '9')
			{
				number[i] = '0';
				loop = true;
				i--;
			}
		}
	}
	return number.substr(0,m);
}