[SOLVED] Trouble with out of range vector iterator

[summersab]

Okay, so I'm not really a C++ noob at all, but I am a little rusty at the moment. Still, I CANNOT figure out what is wrong with the following code. I'm using Visual Studio 2010.

#include <iostream>
#include <fstream>
#include <vector>
#include <string>

using namespace std;

struct student {
	string studentID;
	vector<string> term;
	vector<vector<string>> courses;
};

int main() {

	vector<student> recordVec; 
	student record;
	vector<string> termVec;
	vector<vector<string>> classVec;

	string studentData;

        string name1 = "datain";
	ifstream infile;
	infile.open(name1.c_str());
	if (infile.fail())
	{
		cout << "Error opening " << name1 << endl;
		return 1;
	}

	string linein;
	while (getline(infile, linein))
	{
		int j = 0;
		if (studentData != record.studentID) {
			// Get class data
			studentData.clear();
			int test = linein.size();
***			for (j; j < linein.size(); ++j)
					studentData.push_back(linein[j]);
			classVec[classVec.size()].push_back(studentData);

			record.courses = classVec;
			record.term = termVec;
			recordVec.push_back(record);
		}
         }
}

I THINK I got all of the pertinent code. Anyway, it fails at the *** line. I CANNOT figure out why. If I modify it to be linein.size()-30, it STILL gives me an error. That makes zero sense.

Anyone? Thanks . . .

[Cabhan]

What is the exact error that you are getting?

Also, the line that you mentioned has no vectors in it, so I don't know what you mean by "vector iterator".

[summersab]

I guess my use of terms was somewhat flawed. I'm not using an iteration type, it, but the for loop iterates through the string linein. Also, I should not have referred to linein as a vector since it is a string, but it was late, and the error I get on that line is

Assertion error: vector subscript out of range.

I'm paraphrasing because I'm mobile, so I can't quote verbatim. The error is a runtime error, not compile time.

It really doesn't make sense. The line is 90 characters. I set a temp variable to track linen.size(), and as the for loop hits 89, the program fails. if I subtract even 30 from the condition in the for loop, the loop still throws an error. I don't get it.

I'll try to get the exact error when I get home.

[summersab]

:P I figured out my problem. I had my breakpoints set wrong, and the error was actually on the next line:

classVec[classVec.size()].push_back(studentData);

Since classVec is a multidimmentional vector, I had to create a temporary vector of strings to push onto classVec. You can't push onto a an internal vector if the parent vector is empty.

Guess I was too tired last night. Stupid mistake. Thanks, though!