User input(cin) - Default value

Question

I can\'t figure out how to use a \"default value\" when asking the user for input. I want the user to be able to just press Enter and get the default value. Consider the fol

Answer 1

I'd be tempted to read the line as a string using getline() and then you've (arguably) more control over the conversion process:

int number(20);
string numStr;
cout << "Please give a number [default = " << number << "]: ";
getline(cin, numStr);
number = ( numStr.empty() ) ? number : strtol( numStr.c_str(), NULL, 0);
cout << number << endl;