C / C++ / MFC

//a very simplified vector of doubles
class  vector{
    int sz;         // the size
    double* elem;       //a pointer to the elements
public:
      vector(int s)       //constructor
      :sz(s),           //"initialize sz", <big>I have no idea what does it mean that writting</big>?
      elem(new double[s])       //initialize elem, and the same as above
      {
          for(int i=0; i < s;i++)  elem[i]=0;   //initialize elements
      }      
      int size()  const {return sz;}  //the current size
};

<br />
#include "stdafx.h"<br />
#include "glaux.h"<br />
#include "glut.h"<br />

<br />
GLuint    texture[6];<br />

<br />
int LoadGLTextures()<br />
{<br />
    int Status=FALSE;                                    // Status Indicator<br />
<br />
    AUX_RGBImageRec *TextureImage[1];                    // Create Storage Space For The Texture<br />
<br />
    memset(TextureImage,0,sizeof(void *)*2);               // Set The Pointer To NULL<br />
<br />
    // Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit<br />
    if (TextureImage[0]=LoadBMP("apple.bmp"))<br />
    {<br />
        Status=TRUE;                                    // Set The Status To TRUE<br />
<br />
        glGenTextures(3, &texture[0]);      // Create Three Textures<br />
        // Create Nearest Filtered Texture<br />
        glBindTexture(GL_TEXTURE_2D, texture[0]);<br />
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST); // ( NEW )<br />
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST); // ( NEW )<br />
        glTexImage2D(GL_TEXTURE_2D, 0, 3, <br />
        TextureImage[0]->sizeX, TextureImage[0]->sizeY,0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);<br />
<br />
        // Create Linear Filtered Texture<br />
        glBindTexture(GL_TEXTURE_2D, texture[1]);<br />
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);<br />
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);<br />
        glTexImage2D(GL_TEXTURE_2D, 0, 3, <br />
        TextureImage[0]->sizeX, TextureImage[0]->sizeY,0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);<br />
<br />
        // Create MipMapped Texture<br />
        glBindTexture(GL_TEXTURE_2D, texture[2]);<br />
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);  // ( NEW )<br />
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);<br />
        gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TextureImage[0]->sizeX,TextureImage[0]->sizeY, GL_RGB, GL_UNSIGNED_BYTE,TextureImage[0]->data);               // ( NEW )<br />
<br />
<br />
        if (TextureImage[0])                            // If Texture Exists<br />
        {<br />
            if (TextureImage[0]->data)            // If Texture Image Exists<br />
            {<br />
                free(TextureImage[0]->data);    // Free The Texture Image Memory<br />
            }<br />
            free(TextureImage[0]);                // Free The Image Structure<br />
        }<br />
    }<br />
<br />
    return Status;   <br />
}<br />
//-----------------------------------------------------------------------------<br />
AUX_RGBImageRec * LoadBMP(char *Filename)<br />
{<br />
    FILE *File=NULL;                                    // File Handle<br />
<br />
    if (!Filename)                                        // Make Sure A Filename Was Given<br />
    {<br />
        return NULL;                                    // If Not Return NULL<br />
    }<br />
<br />
    File=fopen(Filename,"r");                            // Check To See If The File Exists<br />
<br />
    if (File)                                            // Does The File Exist?<br />
    {<br />
        fclose(File);                                    // Close The Handle<br />
        return auxDIBImageLoad(Filename);                // Load The Bitmap And Return A Pointer<br />
    }<br />
<br />
    return NULL;   <br />
}<br />