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#include <stdio.h>
#include <stdlib.h>
void draw_board(int boardState[3][3]) {
for(int r = 0; r < 3; r++) {
char* line = calloc(3, 1);
for(int c = 0; c < 3; c++) {
if(boardState[c][r] == 0) {
line[c] = '-';
}
else if(boardState[c][r] == 1) {
line[c] = 'x';
}
else if(boardState[c][r] == 2) {
line[c] = 'o';
}
else {
line[c] = 'E';
}
}
printf(line);
printf("\n");
free(line);
}
}
int check_dir(int sx, int sy, int dx, int dy, int boardState[3][3]) {
int sv = boardState[sx][sy];
if(sv != 0) {
for(int i = 0; i < 2; i++) {
sx += dx;
sy += dy;
if(boardState[sx][sy] != sv) {
return 0;
}
}
return sv;
}
return 0;
}
//return 0 if no win, 1 if x win, 2 if o win
int check_win(int boardState[3][3]) {
if(boardState[1][1] != 0) {
int c = check_dir(1, 0, 0, 1, boardState);
if(c != 0) {
return c;
}
c = check_dir(0, 0, 1, 1, boardState);
if(c != 0) {
return c;
}
c = check_dir(0, 1, 1, 0, boardState);
if(c != 0) {
return c;
}
c = check_dir(0, 2, 1, -1, boardState);
if(c != 0) {
return c;
}
}
if(boardState[0][0] != 0) {
int c = check_dir(0, 0, 1, 0, boardState);
if(c != 0) {
return c;
}
c = check_dir(0, 0, 0, 1, boardState);
if(c != 0) {
return c;
}
}
if(boardState[2][2] != 0) {
int c = check_dir(2, 2, -1, 0, boardState);
if(c != 0) {
return c;
}
c = check_dir(2, 2, 0, -1, boardState);
if(c != 0) {
return c;
}
}
return 0;
}
int is_full(int boardState[3][3]) {
//if all squares full, return 1
//else return 0
for(int r = 0; r < 3; r++) {
for(int c = 0; c < 3; c++) {
if(boardState[c][r] == 0) {
return 0;
}
}
}
return 1;
}
int get_game_state(int boardState[3][3]) {
//0 if game in progress, 1 if x win, 2 if o win, 3 if drawn
int w = check_win(boardState);
if(w == 1 || w == 2) {
return w;
}
else if(is_full(boardState)) {
return 3;
}
else {
return 0;
}
}
int* user_input_pos() {
int* ip = malloc(2 * sizeof(int));
printf("Enter X coordinate");
scanf("%d", &ip[0]);
printf("Enter Y coordinate");
scanf("%d", &ip[1]);
return ip;
}
void clear_screen()
{
system("@cls||clear");
}
int main() {
int board[3][3] = { { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } };
int turn = 0;
while(1) {
clear_screen();
draw_board(board);
int* tl = user_input_pos();
board[tl[0] - 1][3 - tl[1]] = turn + 1;
free(tl);
int s = get_game_state(board);
if(s == 1 || s == 2) {
clear_screen();
draw_board(board);
printf("Someone won!");
printf("\n");
break;
}
if(s == 3) {
printf("Game is drawn!");
printf("\n");
break;
}
turn = !turn;
}
return 0;
}
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