Clearing cin buffer

[Comreak]

I was tinkering with a recent program I made for my programming class which determines the difference between the ages of two people and I discovered a little bug: If the person enters something other than a numerical value, cin kinda wacks out. Here is the code I'm using to fix the problem:

int ErrorHandler()
{
		if(std::cin.fail())
		{
			std::cerr << "Input error \n";
			std::cin.clear(); //Reset input failure indicators
			
			//Flushing buffer 
			char BadInput[5];
			std::cin >> BadInput;
			return 0;
		}
		else
		{
			return 1;
		}
}

It works, but if the user enters more than 4 characters, the program either ignores it or gives me an exception of some sort. Is there a better way to flush the buffer (I'm sort of a newb so I'm not to familiar with the methods for doing this yet)?