I keep getting an error in my code. Normally I'd be able to work it out, but the error is apart of some code that our teacher provided for us. I went over to his office, but he left for the day already.

The exact error is:

"error: aggregate 'std::stringstream strstr' has incomplete type and cannot be defined"

Here is the function that brings up the error:

string StatVect09 :: toString(int numPerLine, string sep) const
{
stringstream strstr;
string str;
string retString;
strstr.clear();
strstr << data [0];
strstr >> str;
retString += str;
for (int i = 1; i < VECT_SIZE; ++i ) {
retString += sep;
retString += " ";
if ((numPerLine > 0 ) && (i % numPerLine == 0 )) retString += "\n";
strstr.clear();
strstr << data [i];
strstr >> str;
retString += str;
}
return retString;
}

I can provide more info if needed, but any help at all is extremely appreciated.

The immediate problem is that it needs a #include <sstream>

However, the code you've posted has a rather large number of problems. First, it is a misuse of stringstream, and should really create an ostringstream, push stuff into it, then return the result of str(). Second, the string argument should be declared const reference, it's an idiom for complex types to avoid copy construction. It should also assert() that the number of items in the vector is greater than 0 and that numPerLine is greater than or equal to 0.

But the most important question is.. Why can't you use std::vector?

Thank you, that solved the problem.

As to answer your questions, I don't know. This entire block of code I copied was provided entirely by our teacher and I didn't modify it at all which was why I was really confused why it was giving me problems.