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//
// connect4.c
//
//
// Created by Tony Snow on 4/12/13.
//
//
#include <stdio.h>
#include "SDL/SDL.h" // import SimpleDirect media Layer library
/*
Tic-tac-toe
To compile:
gcc tic-tac-toe.c -o connect4.exe -lmingw32 -lSDLmain -lSDL
Or:
gcc tictactoe.c -o tictactoe.exe $(sdl-config --cflags --libs)
*/
// Global variable
SDL_Surface *screen = NULL;
void init() {
// Start SDL
SDL_Init(SDL_INIT_EVERYTHING);
// Quit SDL when it's time
atexit(SDL_Quit);
// Set the caption
SDL_WM_SetCaption("Connect 4!", NULL);
// Set up the screen
screen = SDL_SetVideoMode(98*7, 98*7, 32, SDL_SWSURFACE);
}
typedef enum { O, X, _ } Cell;
/* Show a single cell. */
int lookup (char c) {
if (c == 'O') return 0;
else if (c == 'X') return 1;
else return 2;
}
/* Show the game board using a loop within a loop. */
void show (Cell board[6][7]) {
int i, j;
SDL_Surface *cell[] = {
SDL_LoadBMP("redsquare.bmp"), // Load the O
SDL_LoadBMP("yellowsquare.bmp"), // Load the X
SDL_LoadBMP("emptysquare.bmp") };
SDL_Rect location;
for (i = 0; i < 7; i++) {
for (j = 0; j < 6; j++) {
location.x = i * 98;
location.y = j * 98;
SDL_BlitSurface (cell[board[i][j]], NULL,
screen, &location);
}
}
SDL_Flip(screen); // updates the screen
SDL_FreeSurface(cell[0]);
SDL_FreeSurface(cell[1]);
SDL_FreeSurface(cell[2]);
SDL_FreeSurface(cell[3]);
SDL_FreeSurface(cell[4]);
SDL_FreeSurface(cell[5]);
}
/* Return whether number is between 0 and 6 */
int valid (int number) {
return number >= 0 && number < 6;
}
/* Ask the player to make a move. */
void play_turn (Cell board[6][7], Cell player) {
int row, col;
SDL_Event event;
SDL_Rect location;
while (SDL_WaitEvent(&event)) {
switch (event.type) {
case SDL_MOUSEBUTTONDOWN:// if event.type = mousebuttondown
row = event.button.x / 160;
col = event.button.y / 160;
if (valid(row) && valid(col)
&& board [row] [col] == _) {
board[row][col] = player;
return;
}
else {
break;
case SDL_QUIT:
exit(0);
return;
}
}
board[row][col] = player;
}
}
/*
Return the new player, given the old player
When we talk about pointers, this would be a void function with Cell *oldPlayer parameter
*/
Cell switch_player (Cell oldPlayer) {
// Feel free to also show the ternary expression thing
// return (player == O) ? X : O;
if (oldPlayer == O) {
return X;
} else {
return O;
}
}
/* Initialize the game board and describe tic-tac-toe at a high level */
int main (int argc, char ** argv) {
Cell board[6][7] = { { _, _, _, _, _, _, _}, { _, _, _, _, _, _, _}, { _, _, _, _, _, _, _}, { _, _, _, _, _, _, _},{ _, _, _, _, _, _, _}, { _, _, _, _, _, _, _} };
Cell player = O;
init(); // Call that SDL initialization stuff
/* Decide when the game is over */
int game_over (Cell board[6][7]) {
int i, j;
for (i=0; i<6; i++)
{
for(j=0; j<7; j++)
{
if(Cell board[i][j]==O&&
Cell board[i][j+1]==O
&&Cell board[i][j+2]==O
&&Cell board[i][j+3]==O||
Cell board[i][j]==O
&&Cell board[i+1][j]==O
&&Cell board[i+2][j]==O
&&Cell board[i+3][j]==O||
Cell board[i][j]==O
&&Cell board[i+1][j+1]==O
&&Cell board[i+2][j+2]==O
&&Cell board[i+3][j+3]==O||
Cell board[i][j]==O
&&Cell board[i+1][j-1]==O
&&Cell board[i+2][j-2]==O
&&Cell board[i+3][j-3]==O)
{
printf("red wins!");
}
else if (
Cell board[i][j]==X
&&Cell board[i][j+1]==X
&&Cell board[i][j+2]==X
&&Cell board[i][j+3]==X||
Cell board[i][j]==X
&&Cell board[i+1][j]==X
&&Cell board[i+2][j]==X
&&Cell board[i+3][j]==X||
Cell board[i][j]==X
&&Cell board[i+1][j+1]==X
&&Cell board[i+2][j+2]==X
&&Cell board[i+3][j+3]==X||
Cell board[i][j]==X
&&Cell board[i+1][j-1]==X
&&Cell board[i+2][j-2]==X
&&Cell board[i+3][j-3]==X)
{
printf("yellow wins!");
}
}
}
return 0; // Exercise for the students :-)
}
while (!game_over (board)) {
show (board);
play_turn (board, player);
player = switch_player (player);
}
}
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