Thread: How to make blank entry = default

Hi!

Just wondering, how to turn a normal "Enter" response to a default entry?

i.e.

Code:

float number1;
cin Input number: ;
if (number1 = (blank entry or "Enter"){
number1 = 0.02;
}

Thanks.

Originally Posted by swoopy

>Just wondering, how to turn a normal "Enter" response to a default entry?
First read the input into a string first. At that point, there are several different ways to proceed. Here is one method:

Code:

	std::string snum;
	double num;

	std::cout << "Enter a number (or press <ENTER> for default):";
	std::getline(cin, snum);

	std::istringstream converter(snum);
	converter >> num;

	if (!converter)
	{
		if (converter.eof())
		{
			std::cout << "No value was entered.  A default value will used." << endl;
			num = .02;
		}
	}
	std::cout << num << std::endl;

Sweet, thank you.