Question

I am new to c++ please help me figure out what is wrong with this

string c;
stringstream out; //aggregate 'std::stringstream out' has incomplete type and cannot be //defined
out << it->second;
out << end1;//'end1' was not declared in this scope
c = out.str();

Answer 1

You seem to be missing an include for stringstream. On top of that you have a typo

out << end1;

should read

out << endl;

l instead of 1.