Question

have a little problem here:

int IntegerTransformer::transformFrom(std::string string){
    stream->clear();
    std::cout<<string<<std::endl;;
    (*stream)<<string;
    int i;
    (*stream)>>i;
    std::cout<<i<<std::endl;
    return i;
}

I by calling this function with the string “67” (other values dont work too) i get this output:

67
6767

Answer 1

Did you notice there are two std::cout in the function itself?

Beside that also add this:

stream->str(""); //This ensures that the stream is empty before you use it.
(*stream)<<string;

By the way, why don’t you use boost::lexical_cast?

int IntegerTransformer::transformFrom(std::string s){
     return boost::lexical_cast<int>(s);
}