一、遊戲步驟

三子棋的實現其實很簡單，只要思路理清，然後按照步驟一步一步的用程式碼實現就可以了。具體步驟如下：

1、遊戲開始。（列印一個遊戲選單）

2、列印遊戲棋盤。

3、玩家走棋，判斷該座標是否有效，無效，提示重新輸入。有效，列印棋盤；然後判贏，贏，遊戲結束；

4、電腦走棋，列印棋盤，並且判贏。贏，遊戲結束；

步驟如圖：

二、程式碼實現：

1、主要實現：game.c

程式碼如下：

#pragma once
#include"Game.h"

void Game()
{
	char a='w';
	int count = 0;
	char board[ROW][COL];
	InitBoard(board,ROW,COL);
	stampGame(board, ROW, COL);

	while (1)
	{
		PlayerRemove(board, ROW, COL);
		count++;
		stampGame(board, ROW, COL);
		a=IsWinGame(board, ROW, COL);
		if (a != ' ')
		{
			find_win(a);
			break;
		}
		computerRemove(board, ROW, COL);
		count++;
		stampGame(board, ROW, COL);
		a = IsWinGame(board, ROW, COL);
		if (a != ' ')
		{
			find_win(a);
			break;
		}

	}
}

void InitBoard(char board[ROW][COL], int row, int col)
{
	memset(board, ' ', sizeof(board[0][0])*row*col);
}

void stampGame(char board[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;

	for (i = 0; i < row; i++)
	{
		for (j = 0; j < col; j++)
		{
			printf(" %c ",board[i][j]);
			if (j < col - 1)
				printf("|");
		}
		printf("\n");
		
		if (i<row-1)
		{
			for (j = 0; j < row; j++)
			{
				printf("---");
				if (j < row-1)
					printf("|");
			}
		}
		printf("\n");

	}
}

void PlayerRemove(char board[ROW][COL], int row, int col)
{
	int x = -1, y = -1;
    printf("玩家走：\n");
	while (1)
	{		
		scanf("%d %d", &x, &y);
		if (x <= row && y <= col && x > 0 && y > 0)
		{
			if (board[x-1][y-1] == ' ')
			{
				board[x - 1][y - 1] = 'O';
				return;
			}
			else
			{
				printf("此位被佔了請重新輸入：\n");
			}
		}
		else
		{
			printf("垃圾輸入錯誤：\n");
		}
	}
	
}

void computerRemove(char board[ROW][COL], int row, int col)
{
	int x = -1, y = -1;
	printf("電腦走：\n");


	while (1)
	{
		x = rand() % row;
		y = rand() % col;

		if (board[x][y] == ' ')
		{
			board[x][y] = 'X';
			return;
		}
	}
}
char IsWinGame(char board[ROW][COL], int row, int col)
{
	int i = 0;
	for (i = 0; i < row; i++) // 判斷每一行是否相等
	{
		int j = 0;
		for (j = 0; j < col - 1; j++)
		{
			if (board[i][j] != board[i][j + 1])
				break;
		}
		if (j == col - 1)
			return board[i][0];
	}
	for (i = 0; i < col; i++) // 判斷每一列是否相等
	{
		int j = 0;
		for (j = 0; j < row - 1; j++)
		{
			if (board[j][i] != board[j + 1][i])
				break;
		}
		if (j == row - 1)
			return board[0][i];
		
	}

	for (i = 0; i < row - 1; i++) // 判斷每對角線是否相等
	{
		if (board[i][i] != board[i + 1][i + 1])
			break;
	}
	if (i == row - 1)
		return board[0][0];

	for (i = 0; i < row - 1; i++) // 判斷每對角線是否相等
	{
		if (board[i][row - 1 - i] != board[i + 1][row - 1 - i - 1])
			break;
	}
	if (i == row - 1)
		return board[row - 1][0];
	for (i = 0; i < row; i++) // 如果相等，判斷內容是什麼
	{
		int j = 0;
		for (j = 0; j < col; j++)
		{
			if (board[i][j] == ' ')
				return ' ';
		}
	}
	return 'Q';
}
void find_win(char win)
{
	if (win == 'O')
		printf("玩家贏\n");
	else if (win == 'X')
		printf("電腦贏\n");
	else
		printf("平局\n");
}
 

2、標頭檔案 game.h

程式碼如下：

#pragma once
#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<Windows.h>
#include<string.h>
#include<time.h>


#define ROW 3
#define COL 3

void Game(); 
void stampGame(char board[ROW][COL], int row, int col); // 列印棋盤
void InitBoard(char board[ROW][COL], int row, int col); // 初始化
void PlayerRemove(char board[ROW][COL], int row, int col); // 玩家走棋
void computerRemove(char board[ROW][COL], int row, int col); // 電腦走棋
char IsWinGame(char board[ROW][COL], int row, int col); // 判贏
void find_win(char win); // 判贏條件


 

3、具體實現原始檔：game.c

程式碼如下：

#pragma once
#include"Game.h"

void menu()
{
	printf("=============================\n");
	printf("======== 1.play =============\n");
	printf("======== 0.exit =============\n");
	printf("=============================\n");
}

int main()
{
	int input;
	srand((unsigned int) time(NULL));
	do
	{
		menu();
		printf("請選擇<1,0>: ");
		scanf("%d", &input);
		switch (input)
		{
		case 1:
			Game();
			break;
		case 0:
			break;
		default:
			printf("輸入錯誤：\n");
			fflush(stdin);//清空輸入緩衝區，避免輸入字元型資料而死迴圈
			break;
		}
	} while (input);

	system("pause");
	return 0;
}