Is it possible to read infinity or NaN values using input streams?

Question

I have some input to be read by a input filestream (for example):

-365.269511 -0.356123 -Inf 0.000000

When I use std::ifstream mystream;

Answer 1

Just read your variables into string and parse them. You can't put string into double variables and expect them to be outputted like a string, because if it worked, strings wouldn't be necessary.

Seomthing like:

string text;
double d;
while(cin >> text)
{
    if(text == "Inf")       //you could also add it with negative infinity
    {
         d = std::numeric_limits::infinity();
    }
    else
    {
        d = atof(text.c_str());
    }
}