savoir quel case d'un tableau bidimensionel est lié au clic de la souris

#include <cstdlib>
#include <stdlib.h>
#include <SDL/SDL.h>
#include <SDL.h>
#include <iostream>

using namespace std;

bool Initialisation();
void Plateau(int, int);
void Pause();
void Affichage();
void Probleme();
void Souris();
void Tours();



int i,j;
int const largeur = 600;
int const hauteur = 600;
int plateau[3][3];
SDL_Surface *fd, *X, *O, *screen;
SDL_Event event;
SDL_Rect r={0,0,0,0};

int main ( int argc, char** argv )
{
    SDL_Init( SDL_INIT_VIDEO);
    int done =0;


    // initialize SDL video
    if ( SDL_Init( SDL_INIT_VIDEO ) < 0 )
    {
        cout << "Probleme d initialisation" << SDL_GetError() << endl;
        Probleme();
    }

    // create a new window
    screen = SDL_SetVideoMode(largeur,hauteur, 16,SDL_HWSURFACE|SDL_DOUBLEBUF);
    SDL_WM_SetCaption("Morpion Version 1.0", NULL);

    Initialisation();

    Affichage();

    	//Boucle generale
	while(!done)
	{
		//Traiter les evenements
		while(SDL_PollEvent(&event))
		{
			switch(event.type)
			{
				case SDL_QUIT:
					done=1;
					break;
				case SDL_KEYUP:
					if(event.key.keysym.sym==SDLK_a)
						done=1;
					break;
					case SDL_MOUSEBUTTONUP:
                    Plateau(event.button.x,event.button.y);
					break;
				default:
					break;
			}
		}

        // finally, update the screen :)

        SDL_Flip(screen);
    } // end main loop

    // free loaded bitmap
    SDL_FreeSurface(screen);

    // all is well ;)
    printf("Exited cleanly\n");
    SDL_Quit();
    return 0;
}

bool Initialisation()
{
   fd = NULL;
   X = NULL;
   O = NULL;

   //pour fd
   if( (!fd == NULL) || (!X == NULL) || (!O == NULL) )
   {
       SDL_FreeSurface(fd), fd= NULL;
       SDL_FreeSurface(X), X= NULL;
       SDL_FreeSurface(O), O = NULL;
       cout<< "Probleme d initialisation des images" << endl;
       Probleme();
   }

   if( (fd == NULL) || (X == NULL) || (O == NULL) )
   {
       cout<< "Probleme de chargement de fd, x et o" << endl;
       Probleme();
   }

   X = SDL_LoadBMP("x.bmp");
   O = SDL_LoadBMP("o.bmp");
   fd = SDL_LoadBMP("fd.bmp");




}

void Pause()
{
    int continuer = 1;
    SDL_Event event;

    while (continuer)
    {
        SDL_WaitEvent(&event);
        switch(event.type)
        {
            case SDL_QUIT:
                continuer = 0;
        }
    }
}

void Affichage()
{
    SDL_Rect r = {0};
    SDL_BlitSurface(fd,NULL,screen,&r);
}

void Probleme()
{
    char choix;
    cout<< " Vous avez un probleme\n "<<endl;
    cout<< " Voules vous quitter? Oui ou Non :\n "<<endl;

    switch(choix)
    {
        case 'oui':
        EXIT_SUCCESS;
        break;

        case 'non':
        EXIT_FAILURE;
        break;
    }

}

void Plateau(int x, int y )
{
   int h,l,w,a,b;
   for(i=0; i<3; i++)
   for(j=0;j<3;j++)
   plateau[i][j]=0;

   //calcul de la case associé:
   i=x/(largeur/3);
   j=y/(hauteur/3);

   if(plateau[i][j]==0)
   {
   {
    //pour les x:
    if(x<200)
    {
    x=0;
    }
    else if(x<400)
    {
    x=200;
    }
    else
    {
    x=400;
    }
    //pour les y :
    if(y<200)
    {
    y=0;
    }
    else if(y<400)
    {
    y=200;
    }
    else
    {
    y=400;
    }
    r.x=x;
    r.y=y;
    }
   SDL_BlitSurface(X,NULL,screen,&r);
   }

   else if(plateau[i][j]==2)
   {
   {
    //pour les x:
    if(x<200)
    {
    x=0;
    }
    else if(x<400)
    {
    x=200;
    }
    else
    {
    x=400;
    }
    //pour les y :
    if(y<200)
    {
    y=0;
    }
    else if(y<400)
    {
    y=200;
    }
    else
    {
    y=400;
    }
    r.x=x;
    r.y=y;
    }
   SDL_BlitSurface(O,NULL,screen,&r);
   }

}