This is starter code for OpenGL 4.0 in C++ using FreeGlut

OpenGL Starter Code

/*
    g++ main.cpp -lglut -lGL -lGLU
*/

#include "GL/freeglut.h"
#include "GL/gl.h"

char title[] = "OpenGL Window";

void initGL() {
    glClearColor(0.93f, 0.93f, 0.93f, 1.0f);
    glClearDepth(1.0f);
    
    glEnable(GL_DEPTH_TEST); // Enable for z-culling
    glDepthFunc(GL_LEQUAL);
    glShadeModel(GL_SMOOTH);
    
    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}

void display() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glMatrixMode(GL_MODELVIEW);
    
    glLoadIdentity();
    
    /*
        Insert Code Here
    */
    
    glutSwapBuffers();
}

void reshape(GLsizei width, GLsizei height) {
    if(height == 0) {
        height = 1; // Avoids divide by zero error
    }   
    
    GLFloat aspect = (GLfloat) width / (Glfloat) height;
    glViewport(0, 0, width, height);
    
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    
    gluPerspective(45.0f, aspect, 0.1f, 100.0f);
}

int main(int argc, char **argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE);
    
    glutInitWindowSize(640, 480);
    glutInitWindowPosition(50, 50);
    
    glutCreateWindow(title);
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    
    initGL();
    glutMainLoop();
    
    return 0;
}