stringstream acts crazy at double to string!

[TheDestroyer]

Hello guys,

I wrote a function that converts any variable to a string using stringstream, the function is the following:

template <typename T>
std::string ToString(T const& value)
{
    std::stringstream sstr;

    sstr << sstr.scientific << value;
    return sstr.str();
}

I call the function as follows:

string fileToOpen = string(filename.getValue() + string("_phi_") + ToString<T>(phi[ang]) + string("_theta_") + ToString<T>(theta[ang]) + string("_Iu_") + ToString<T>(laser.getLambertBeerSlope()) + string("_.bin"));

where all those variables to be converted to strings are doubles.

The problem is that the conversion always adds a "256" to the converted string, so I have:

theta[ang] = 9
phi[ang] = 37
laser.getLambertBeerSlope() = 1e-6

but the file name reads eventually:

FitData_phi_25637_theta_2569_Iu_2561e-06_.bin

Why does this "256" keep adding? has anyone faced such a problem before?

I'm using Ubuntu 12.04 and g++ in VMWare Workstation virtual machine (the problem showed up also on a Redhat/CentOS computer).

Thank you for any efforts.

[monad]

Change sstr << sstr.scientific << value; to sstr << std::scientific << value;.

[TheDestroyer]

Oh, that simple! Thanks man. :)