Something

	for(int x = 0; x < 4; x++) 
		{
            std::cout<<"Quadrant " << roman[x] <<std::endl;
            std::cin >>str;
			if(str == "x")
			{
				if(nFound = false)
				{
					nFound = true
					str >> vars[x]
				}
				else
				{
					std::cout<<"Error\n";
					return 1;
				}
			else
			{
				std::istringstream istr(str);
				istr >> vars[x];

			}
		}