Question

I have a function template as this.

template<class T> T getFromString(const string& inStream)
{
    istringstream stream (inStream);
    T t;

    stream >> t;
    return t;
}

I am not getting how to use this function template. I have tried the usual method of using function template it was giving an error. Please let me know for getting out of this.

Answer 1

You can use it like this:

std::string a = "11";
int n = getFromString<int>(a);

This will extract the integer value from the string.

BTW, it is good to use T t = T(); inside the template as it will gurantee the initialization for the basic datatypes even if the extaction fails.