Hi again! It's me and my second post 
Anyways, I would Like some help to resolve a little problem, Infact It's a bug not an error.
See the problem is that my code can compile/build and run but no 3D Blender object is shown.
#include "stdafx.h" //VC++ Must have this ELSE error.
#include <stdarg.h>
#include <math.h>
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
#include <GL/glut.h>
using namespace std;
void display();
void specialKeys();
float stringToDouble(string& s);
vector<string> explode(const string& str,const char& ch);
double rotate_y=0;
double rotate_x=0;
void display(){
float x,y,z;
string v;
string a,b,c;
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
/**perform object rotation using keyboard arrows in specialKeys function**/
glRotatef( rotate_x, 1.0, 0.0, 0.0 );
glRotatef( rotate_y, 0.0, 1.0, 0.0 );
ifstream myfile("test.obj"); // open file
if (myfile.is_open())
{
while ( myfile.good())
{
string line;
getline (myfile,line); // get current line
vector<string> subs;
subs=explode(line,' '); //explode line by space
v=subs[0];
if (v == "v") { // This = True
/***draw polygon***/
glBegin(GL_POLYGON);
a=subs[1];
b=subs[2];
c=subs[3];
x=stringToDouble(a);
y=stringToDouble(b);
z=stringToDouble(c);
/****draw 3D vertex*****/
glVertex3f(x,y,z);
glEnd();
}
}
}
myfile.close(); //close file
glFlush();
glutSwapBuffers();
}
/**** special key***/
void specialKeys( int key, int x, int y ) {
if (key == GLUT_KEY_RIGHT)
rotate_y += 5;
else if (key == GLUT_KEY_LEFT)
rotate_y -= 5;
else if (key == GLUT_KEY_UP)
rotate_x += 5;
else if (key == GLUT_KEY_DOWN)
rotate_x -= 5;
glutPostRedisplay();
}
/*** main***/
int main(int argc, char* argv[]){
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutCreateWindow("Object");
glEnable(GL_DEPTH_TEST);
glutDisplayFunc(display);
glutSpecialFunc(specialKeys);
glutMainLoop();
return 0;
}
/**converts string to double***/
float stringToDouble(string& s )
{
std::istringstream i(s);
float x;
if (!(i >> x))
return 0;
return x;
}
/***Explode : exploding strings***/
vector<string> explode(const string& str, const char& ch) {
string next;
vector<string> result;
// For each character in the string
for (string::const_iterator it = str.begin(); it != str.end(); it++) {
// If we've hit the terminal character
if (*it == ch) {
// If we have some characters accumulated
if (!next.empty()) {
// Add them to the result vector
result.push_back(next);
next.clear();
}
} else {
next += *it;
}
}
if (!next.empty())
result.push_back(next);
return result;
}
By the way I think this test.obj file is important too...
(I'm not quite sure how to use it 
) ... Here it is.....
# Blender v2.71 (sub 0) OBJ File: 'untitled.blend'
# www.blender.org
mtllib test.mtl
o Cube
v 1.000000 -1.000000 -1.000000
v 1.000000 -1.000000 1.000000
v -1.000000 -1.000000 1.000000
v -1.000000 -1.000000 -1.000000
v 1.000000 1.000000 -0.999999
v 0.999999 1.000000 1.000001
v -1.000000 1.000000 1.000000
v -1.000000 1.000000 -1.000000
usemtl Material
s off
f 1 2 3 4
f 5 8 7 6
f 1 5 6 2
f 2 6 7 3
f 3 7 8 4
f 5 1 4 8
Maby you can see that it is a simple cube 
.
Anyways, I hope you can help, thanks!
). But, it can be confusing at first if you're getting your information from multiple sources that seem to contradict each other.
