bioinf-2023-2024-introduction-cpp/ex0-tictactoe/tictactoe.c

/*
 ============================================================================
 Name        : tictactoe.c
 Author      : 
 Version     :
 Copyright   : Your copyright notice
 Description : Hello World in C, Ansi-style
 ============================================================================
 */

#include <stdio.h>
#include <stdlib.h>

/*
 * 0 - nobody wins
 * 1 - circles win
 * 2 - crosses win
 */
int testForWin(int* board) {
	// TODO make the code clean

	// circles horizontal
	if (board[0] == 1 && board[1] == 1 && board[2] == 1)
		return 1; // circles in 1st line
	if (board[3] == 1 && board[4] == 1 && board[5] == 1)
		return 1; // circles in 2nd line
	if (board[6] == 1 && board[7] == 1 && board[8] == 1)
		return 1; // circles in 3rd line

	// circle vertical
	if (board[0] == 1 && board[3] == 1 && board[6] == 1)
		return 1; // circles in 1st line
	if (board[1] == 1 && board[4] == 1 && board[7] == 1)
		return 1; // circles in 2nd line
	if (board[2] == 1 && board[5] == 1 && board[8] == 1)
		return 1; // circles in 3rd line

	// circle diagonal
	if (board[0] == 1 && board[4] == 1 && board[8] == 1)
		return 1; // circles in 1st line
	if (board[2] == 1 && board[4] == 1 && board[6] == 1)
		return 1; // circles in 2nd line

	// crosses horizontal
	if (board[0] == 2 && board[1] == 2 && board[2] == 2)
		return 2; // crosses in 1st line
	if (board[3] == 2 && board[4] == 2 && board[5] == 2)
		return 2; // crosses in 2nd line
	if (board[6] == 2 && board[7] == 2 && board[8] == 2)
		return 2; // crosses in 3rd line

	// crosses vertical
	if (board[0] == 2 && board[3] == 2 && board[6] == 2)
		return 2; // crosses in 1st line
	if (board[1] == 2 && board[4] == 2 && board[7] == 2)
		return 2; // crosses in 2nd line
	if (board[2] == 2 && board[5] == 2 && board[8] == 2)
		return 2; // crosses in 3rd line

	// crosses diagonal
	if (board[0] == 2 && board[4] == 2 && board[8] == 2)
		return 2; // crosses in 1st line
	if (board[2] == 2 && board[4] == 2 && board[6] == 2)
		return 2; // crosses in 2nd line
	return 0;
}

void printBoard(int* board) {
	// TODO make this function smaller, and clean
	printf("%c | %c | %c\n",
			board[0] == 1 ? 'O' : (board[0] == 2 ? 'X' : ' '),
			board[1] == 1 ? 'O' : (board[1] == 2 ? 'X' : ' '),
			board[2] == 1 ? 'O' : (board[2] == 2 ? 'X' : ' '));
	printf("------------\n");
	printf("%c | %c | %c\n",
			board[3] == 1 ? 'O' : (board[3] == 2 ? 'X' : ' '),
			board[4] == 1 ? 'O' : (board[4] == 2 ? 'X' : ' '),
			board[5] == 1 ? 'O' : (board[5] == 2 ? 'X' : ' '));
	printf("------------\n");
	printf("%c | %c | %c\n",
			board[6] == 1 ? 'O' : (board[6] == 2 ? 'X' : ' '),
			board[7] == 1 ? 'O' : (board[7] == 2 ? 'X' : ' '),
			board[8] == 1 ? 'O' : (board[8] == 2 ? 'X' : ' '));
}

int main(void) {
	int board[9];
	for (int i = 0; i < 9; i++)
		board[i] = 0;

	board[0] = 1;
	board[4] = 1;
	board[8] = 1;

	// clean board
	printBoard(board);

	// logic
	while (1) {
		// TODO REMARK, if there is no reading an input
		//      from the user there will be here inf loop

		// 1. TODO ask user for the move
		//		TODO validate the move (field has to be empty)
		//		TODO check if user wins, then print and exit
		//           the loop

		// 2. TODO computer makes the move
		//      TODO the computer's move does not have to
		//           clever, but it has to be correct

		// 3. TODO print the board

		// 4. check if there is a winner, if there is a
		//         winner then exit the loop
		int result = testForWin(board);
		if (result != 0) {
			printf("%s WINS!\n", result == 1 ? "circles" : "crosses");
			break;
		}
	}

	puts("TicTacToe finished");
	return EXIT_SUCCESS;
}