cin.ignore

[cplusplusAbe]

Hello guys,
I am very close to finding a solution to getting my code to run correctly.
I need to create a cin.ignore that says the following;

ignore this '1' - this one is any character
UNLESS it's a negative - or any number from 0 to 9


So far I have this but it ignores 1 always.
even if i start my input with a number.

	cin.ignore(1,'-' || 1 || 2 || 3 || 4 || 5 || 6 || 7 || 8 || 9||0);
	cin >> num1;
	cin >> function;
	function = tolower(function);
	if (function == '|')
	{
		cin.ignore(numeric_limits < std::streamsize>::max(),'\n');
	}

	else
	cin >> num2;

[gunnerfunner]

http://www.cplusplus.com/forum/beginner/206234/