Error C2143: syntax error: missing ';' before the namespace

I am VERY new to C ++ and Open GL, and I am trying to display 3D objects in a scene. it worked fine with one, but when I tried changing my code to add a second, my code regarding the HUD text showing the location of the camera started to give errors. The above error is shown and appears to be in the sstream (#include) file. I tried looking and asking for help, but I don’t understand anything. When I comment out the #include line and the code that uses it, I get a similar statement: "error C2143: syntax error: missing"; before "use" in my main.cpp file.

I am running Visual Studio 2010, and I even tried disabling it all again and copying the code to a new project. Help would be greatly appreciated.

#include <Windows.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "glut.h"
#include "SceneObject.h"
#include <fstream>
#include <sstream>
#include <iostream>
#include <string>
//#include <cmath>
//#include <limits>
//#include <cstdlib>

using namespace std;

...

stringstream ss;
ss << "Camera (" << cam.pos.x << ", " << cam.pos.y << ", " << cam.pos.z << ")";
glClear(GL_DEPTH_BUFFER_BIT);
outputText(-1.0, 0.5, ss.str());

...

#ifndef SCENEOBJECT_H
#define SCENEOBJECT_H
#include <string>
#include <iostream>
#include <fstream>

using namespace std;

struct point3D {
    float x;
    float y;
    float z;
};

struct colour{
    float r;
    float g;
    float b;
};

struct tri {
    int a;
    int b;
    int c;
};

class SceneObject {
private:
    int NUM_VERTS;
    int NUM_COL;
    int NUM_TRI;
    point3D  * vertices;
    colour * colours;
    tri  * indices;
    void drawTriangle(int a, int b, int c);
public:
    SceneObject(const string fName) {
        read_file(fName);
    }
    void drawShape()
    {
        // DO SOMETHING HERE
    }
    int read_file (const string fileName)
    {
    ifstream inFile;
    inFile.open(fileName);

    if (!inFile.good())
    {
        cerr  << "Can't open file" << endl;
        NUM_TRI = 0;
        return 1;
    }

    //inFile >> shapeID;

    inFile >> NUM_VERTS;
    vertices = new point3D[NUM_VERTS];

    for (int i=0; i < NUM_VERTS; i++)
    {   
        inFile >> vertices[i].x;
        inFile >> vertices[i].y;
        inFile >> vertices[i].z;
    }

    inFile >> NUM_COL;
    //inFile >> randomCol;
    colours = new colour[NUM_COL];
    /*if (randomCol == 'y')
    {
        for (int i=0; i < NUM_COL; i++)
        {
            colours[i].r = ((float) rand() / (RAND_MAX+1));
            colours[i].g = ((float) rand() / (RAND_MAX+1));
            colours[i].b = ((float) rand() / (RAND_MAX+1));
        }
    }
    else if (randomCol == 'n')
    {*/
        for (int i=0; i < NUM_COL; i++)
        {   
            inFile >> colours[i].r;
            inFile >> colours[i].g;
            inFile >> colours[i].b;
        }
    //}

    inFile >> NUM_TRI;
    indices = new tri[NUM_TRI];

    for (int i=0; i < NUM_TRI; i++)
    {   
        inFile >> indices[i].a;
        inFile >> indices[i].b;
        inFile >> indices[i].c;
    }

    inFile.close();
    return 0;
}
}
#endif

I have not changed the code and, as far as I know, there are half-columns where they should be. Even my friend, who had been programming for 5 years, could not solve this. If necessary, I will include any other specific code. And when I said new for C ++ and OpenGL, I really did a lot of VERY new. This is even my first post. I will get there in the end.