feat: show chessboard

main.c

@@ -0,0 +1,59 @@
+#include <stdio.h>
+#define BOT_SYMBOL 1
+#define OPPONENT_SYMBOL 2
+
+void reset(short* board){
+/*
+	Reset the game, clear the chessboard.
+	
+	Args:
+		
+*/
+	for (short i=0; i<9; i++)
+		board[i] = 0;
+}
+
+void show(short *board){
+	short loc;
+	printf("┼───┼───┼───┼\n");
+	for (short i=0; i<3; i++){
+		printf("│ ");
+		for (short j=0; j<3; j++){
+			loc = 3*i+j;
+			if (board[loc] == 0)
+				printf("  │ ");
+			else if (board[loc] == BOT_SYMBOL)
+				printf("○ │ ");
+			else
+				printf("✕ │ ");
+		}
+		printf("\n");
+		printf("┼───┼───┼───┼\n");
+	}
+	printf("\n\n");
+}
+
+void get_available_actions(short *board, short *result, short *length){
+	short index = 0;	
+	for (int i=0; i<9; i++)
+		if (board[i] == 0)
+			result[index++] = i;
+	*length = (index-1);
+}
+
+int main(){
+	short board[9]= {0};			// tic tac toe's chessboard
+	short available_actions[9];
+	short available_actions_length;
+	
+	board[0] = 1;
+	board[2] = 2;
+	show(board);
+	get_available_actions(board, available_actions, &available_actions_length);
+	for (short i=0; i<available_actions_length; i++){
+		printf("%d ", available_actions[i]);
+	}
+	printf("\n");
+	// reset(board);
+	// show(board);
+}