Definition File Problems

The complaint is 'Unexpected end of file when looking for precompiled header directive'. This message is given in all 3 of my .cpp files. Here is one of them:

Student_info.cpp

Code:

---

#include "Student_info.h"

using namespace std;

bool compare(const Student_info& x, const Student_info y)
{
        return x.name < y.name;
}

istream& read(istream& is, Student_info s)
{
        is >> s.name >> s.midterm >> s.final;

        read_hw(is, s.homework);
        return is;
}

istream& read_hw(istream& in, vector<double>& hw)
{
        if(in) {
                //get rid of previous contents
                hw.clear();

                double x;
                while(in >> x)
                        hw.push_back(x);
                in.clear();
        }
        return in;
}

---

Do you know what the error means? Actually here is the header file as well.

Student_info.h

Code:

---

#ifndef GUARD_Student_info
#define GUARD_Student_info

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

struct Student_info{
        std::string name;
        double midterm, final;
        std::vector<double> homework;
};

bool compare(const Student_info&, const Student_info&);
std::istream& read(std::istream&, Student_info&);
std::istream& read_hw(std::istream&, std::vector<double>&);
#endif

---

Okay I got it all to work out. There were a couple of syntax errors in my program and also I had to use this line of code at the beginning of all my .cpp files:

Code:

---

#include "StdAfx.h"

---

I only had that in my main source (.cpp) file to start with.