Simple AI Caro - NDDCoder

#include <iostream>
#include <stdio.h>
#include <conio.h>
#include <windows.h>
using namespace std;

char myTurn;
char board[15][15];
int score[15][15];

void printBoard(int board[15][15]) {
	for (int i = 0; i < 15; i++) {
		for (int j = 0; j < 15; j++) {
			if (j > 0) {
				cout << "," << board[i][j];
			} else {
				cout << board[i][j];
			}
		}
		cout << endl;
	}
}

void writeBoard() {
	FILE* f = fopen("board", "w");
	for (int i = 0; i < 15; i++) {
		for (int j = 0; j < 15; j++) {
			if (j == 14) {
				fprintf(f, "%c\n", board[i][j]);
			} else {
				fprintf(f, "%c,", board[i][j]);
			}
		}
	}
	
	fclose(f);
}

void readBoard()
{
	FILE* f = fopen("board", "r");
	for (int i = 0; i < 15; i++) {
		for (int j = 0; j < 15; j++) {
			if (j == 14) {
				fscanf(f, "%c\n", &board[i][j]);
			} else {
				fscanf(f, "%c,", &board[i][j]);
			}
		}
	}
	fclose(f);
}

bool checkTurn()
{
	FILE* f = fopen("turn", "r");
	char turn;
	fscanf(f, "%c", &turn);
	fclose(f);
	return myTurn == turn;
}

void swapTurn()
{
	FILE* f = fopen("turn", "w");
	fprintf(f, "%c", myTurn == 'x' ? 'o' : 'x');
	fclose(f);
}

void eval(char board[15][15], int score[15][15]) {
	
	for (int row = 0; row < 15; row++) {
		for (int col = 0; col < 15; col++) {
			score[row][col] = 0;
		}
	}
	
	for (int row = 0; row < 15; row++) {
		for (int col = 0; col < 15; col++) {
			if (board[row][col] != '-') {
				continue;
			}
			int memory[10][2];
			int base = 4;
			for (int i = max(row - 1, 0); i <= min(row + 1, 14); i++) {
				for (int j = max(col - 1, 0); j <= min(col + 1, 14); j++) {
					score[row][col] += board[i][j] != '-';
				}	
			}
			//ngang 4
			int i, j = col - 1, k = base;
			while(j > 0 && board[row][j] != '-') {
				if (board[row][j] == board[row][j - 1]) {
					score[row][col] += ++k;
				} else {
					break;
				}
				j--;
			}
			//ngang 6
			j = col + 1;
			if (col - 1 >= 0 && col + 1 <= 14 && board[row][col - 1] != board[row][col + 1]) {
				k = base;
			}
			while(j < 14 && board[row][j] != '-') {
				if (board[row][j] == board[row][j + 1]) {
					score[row][col] += ++k;	
				} else {
					break;
				}
				j++;
			}
			//doc 8
			i = row - 1;
			k = base;
			while(i > 0 && board[i][col] != '-') {
				if (board[i][col] == board[i - 1][col]) {
					score[row][col] += ++k;	
				} else {
					break;
				}
				i--;
			}
			//doc 2
			i = row + 1;
			if (row - 1 >= 0 && row + 1 <= 14 && board[row - 1][col] != board[row + 1][col]) {
				k = base;
			}
			k = base;
			while(i < 14 && board[i][col] != '-') {
				if (board[i][col] == board[i + 1][col]) {
					score[row][col] += ++k;	
				} else {
					break;
				}
				i++;
			}
			//cheo 7
			i = row - 1;
			j = col - 1;
			k = base;
			while(i > 0 && j > 0 && board[i][j] != '-') {
				if (board[i][j] == board[i - 1][j - 1]) {
					score[row][col] += ++k;	
				} else {
					break;
				}
				i--;
				j--;
			}
			//cheo 3
			i = row + 1;
			j = col + 1;
			if (row - 1 >= 0 && col - 1 >= 0 
				&& row + 1 <= 14 && col + 1 <= 14 
				&& board[row - 1][col - 1] != board[row + 1][col + 1]) {
				k = base;
			}
			while(i < 14 && j < 14 && board[i][j] != '-') {
				if (board[i][j] == board[i + 1][j + 1]) {
					score[row][col] += ++k;	
				} else {
					break;
				}
				i++;
				j++;
			}
			//cheo 9
			i = row - 1;
			j = col + 1;
			k = base;
			while(i > 0 && j < 14 && board[i][j] != '-') {
				if (board[i][j] == board[i - 1][j + 1]) {
					score[row][col] += ++k;	
				} else {
					break;
				}
				i--;
				j++;
			}
			//cheo 1
			i = row + 1;
			j = col - 1;
			if (row - 1 >= 0 && col + 1 <= 14 
				&& row + 1 <= 14 && col - 1 >= 0
				&& board[row - 1][col + 1] != board[row + 1][col - 1]) {
				k = base;
			}
			while(i < 14 && j > 0 && board[i][j] != '-') {
				if (board[i][j] == board[i + 1][j - 1]) {
					score[row][col] += ++k;	
				} else {
					break;
				}
				i++;
				j--;
			}
//			cout << row << " " << col << " " << score[row][col] << endl;
		}
	}
}

void maxScore(int &i, int &j) {
	int max = 0;
	for (int row = 0; row < 15; row++) {
		for (int col = 0; col < 15; col++) {
			if (score[row][col] > max) {
				max = score[row][col];
				i = row;
				j = col;
			}
		}
	}
	if (max == 0) {
		i = 7;
		j = 7;
		while (board[i][j] != '-' && j <= 14) {
			j++;
		}
	}
}

int main() {
	int t;
	cout << "Vui long nhap quan (x/o):";
	cin >> myTurn;
	while (true) {
		Sleep(3000);
		if (! checkTurn()) {
			continue;
		}
//		system("cls");
//		cout << "Press any key to play:";getch();
		readBoard();
		eval(board, score);
		int row, col;
		maxScore(row, col);
		board[row][col] = myTurn;
		cout << row << " " << col << endl;
//		printBoard(score);
		writeBoard();
		swapTurn();	
		
	}
}