============================= board.hpp =======================================
extern SDL_Surface* screen;
class board {
private:
	int brd[3][3]; /* brd contains the blocks. 0 is empty, 1s are Xs and 2s are Os */
	int brdLocs[3][3][2];
	/* brdLocs stores the positions where the marks ( X or O ) are drawn. */
	SDL_Surface* brdImg;
	SDL_Surface* XImg;
	SDL_Surface* OImg;
	
public:
	board(void);
	void assignBlock(int x, int y, int type);
	void drawBoard(void);
	void drawBlocks(void);
};

board::board(){
	brdImg = SDL_DisplayFormat(IMG_Load("board.png"));
	XImg = SDL_DisplayFormat(IMG_Load("x.png"));
	OImg = SDL_DisplayFormat(IMG_Load("o.png"));
	brdLocs =  { { {28,32}, {112,33}, {220,51} }, { {20,122}, {115,131}, {222,144 } }, { {13,210}, {111,221}, {227,238} } };
	if( brdImg == NULL or XImg == NULL or OImg == NULL){
		fprintf(stderr,"Failed to load one or more GFX files. Please make sure they are all in the same folder as this executable\n");
	}
}

void board::assignBlock(int x, int y, int type){
	if ( brd[x-1][y-1] == 0){
		brd[x-1][y-1] = type;
	//	return true;
	} //else {
		//return false;
	//}
}

void board::drawBoard(void){
	
}

void board::drawBlocks(void){
	
}
============================ End board.hpp ==========================================



============================ main.cpp ================================================
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include "board.hpp"

SDL_Surface* screen;

SDL_Event event;

int player;

void player_change (){
	if (player == 1) {
		player = 2;
	} else if (player == 2) {
		player = 1;
	} else {
	 player = 1; // This should never happen.. really!
	}
}

int main(void){
	SDL_Init(SDL_INIT_EVERYTHING);
	screen = SDL_SetVideoMode( 320, 320, 32, SDL_SWSURFACE );
	board brd;
	int mousex;
	int mousey;
	bool gameRunning = true;
	while(gameRunning){
		while(SDL_PollEvent(&event)){
			if(event.type == SDL_MOUSEBUTTONDOWN){
				SDL_GetMouseState( &mousex, &mousey );
				if(mousex <= 106){
					if (mousey <= 106) {
						brd.assignBlock(1,1,player);
						player_change();
					} else if ( mousey > 106 && mousey <= 212 ){
						brd.assignBlock(1,2,player);
						player_change();
					} else if ( mousey > 106 && mousey <= 320 ){
						brd.assignBlock(1,3,player);
						player_change();
					}
				} else if ( mousex > 106 && mousex <= 212 ){
					if (mousey <= 106) {
						brd.assignBlock(2,1,player);
						player_change();
					} else if ( mousey > 106 && mousey <= 212 ){
						brd.assignBlock(2,2,player);
						player_change();
					} else if ( mousey > 106 && mousey <= 320 ){
						brd.assignBlock(2,3,player);
						player_change();
					}
				} else if ( mousex > 212 && mousex <= 320 ){
					if (mousey <= 106) {
						brd.assignBlock(3,1,player);
						player_change();
					} else if ( mousey > 106 && mousey <= 212 ){
						brd.assignBlock(3,2,player);
						player_change();
					} else if ( mousey > 106 && mousey <= 320 ){
						brd.assignBlock(3,3,player);
						player_change();
					}
				}
			} else if (event.type == SDL_QUIT) {
				gameRunning = false;
			}
		}
		
		SDL_Flip( screen );
	}
	SDL_Quit();
	return 0;
}
==================================== end main.cpp =========================================