C語言實現一個大家小時候都玩過的小遊戲的進階版本，不止是三子棋，可以根據玩家需要設定棋盤大小。的可讀性，我將原始碼分為了三個部分，分別是原始檔test.c、game.c、game.h。

test.c部分是遊戲進入、開始、結束的骨幹程式碼。

game.c是遊戲的具體如何實現的程式碼。

game.h是所有自定義函式以及庫函式的標頭檔案包含、函式宣告以及巨集定義。

可以根據需要自行設定ROW和COL的值達到改變棋盤大小以及勝利條件。

標頭檔案

game.h

#pragma once
#include<stdio.h>
#include<time.h>
#include<stdlib.h>
#include<Windows.h>

#define ROW 3   //棋盤的行數
#define COL 3	//棋盤的列數
//game函式
void game();
//列印簡易遊戲選單
void menu();
//初始化棋盤
void init_board(char board[ROW][COL], int row, int col);
//列印棋盤
void print_board(char board[ROW][COL], int row, int col);
//電腦下棋
void computer_chess(char board[ROW][COL], int row, int col);
//玩家下棋
void player_playing_chess(char board[ROW][COL], int row, int col);
//判斷是否有一方獲勝
char judge_wins(char board[ROW][COL], int row, int col);
//判斷是否已經平局
int is_full(char board[ROW][COL], int row, int col);
 

主函式

test.c

#include"game.h"

int main()
{
    //播種由函式 rand 使用的隨機數發生器
	srand((unsigned int)time(NULL));
    menu();
	int input = 0;
	do
	{
		printf("請輸入->\n");
		scanf("%d", &input);
		switch (input)
		{
		case 1:
			game();
			break;
		case 0:
			printf("退出遊戲\n");
			break;
		default:
			printf("輸入錯誤：\n");
			break;
		}
	} while(input);
	return 0;
}
 

具體實現遊戲的函式

game.c

#include"game.h"
void game()
{
	char board[ROW][COL] = { 0 };
	init_board(board, ROW, COL);
	print_board(board, ROW, COL);
	char ret = 0;
	while (1)
	{
		computer_chess(board, ROW, COL);
        //判斷是否結束
		ret = judge_wins(board, ROW, COL);
		print_board(board, ROW, COL);
		if (ret)
			break;
		player_playing_chess(board, ROW, COL);
        //判斷是否結束
		 ret = judge_wins(board, ROW, COL);
		 print_board(board, ROW, COL);
		if (ret)
			break;		
	}
    //結束後列印棋盤
    print_board(board, ROW, COL);
    //根據返回值ret判斷勝利的一方
	if (ret == '#')
		printf("玩家勝利！\n");
	else if (ret == '*')
		printf("電腦勝利！\n");
	else if (ret == 'Y')
		printf("平局\n");
}
//選單
void menu()
{
	printf("***************************\n");
	printf("*   ****** MENU *******   *\n");
	printf("*   ******1.play*******   *\n");
	printf("*   ******0.exit*******   *\n");
	printf("*   *******************   *\n");
	printf("***************************\n");
}
//初始化棋盤
void init_board(char board[ROW][COL],int row,int col)
{
	int i = 0;
	for (i = 0; i < row; ++i)
	{
		int j = 0;
		for (j = 0; j < col; ++j)
		{
			board[i][j] = ' ';
		}
	}
}
//列印棋盤
void print_board(char board[ROW][COL], int row, int col)
{
	int i = 0;
	for (i = 0; i < row; i++)
	{
		int j = 0;
		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 < col; j++)
			{
				printf("---");
				if (j < col - 1)
					printf("|");
			}
			printf("\n");
		}
	}
}
//玩家下棋，玩家下棋記為 #
void player_playing_chess(char board[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;
	printf("玩家下棋\n");
	printf("請輸入座標\n");
	while (1)
	{
		scanf("%d %d", &i, &j);
		if (i > 0 && i <= row && j > 0 && j <= col && board[i - 1][j - 1] == ' ')
		{
			board[i - 1][j - 1] = '#';
			break;
		}
		else
			printf("座標非法，請重新輸入：\n");
	}
}
//電腦下棋，記為 *
void computer_chess(char board[ROW][COL], int row, int col)
{
	printf("電腦下棋\n");
	while (1)
	{
		int i = rand() % row;//滿足棋盤的座標
		int j = rand() % col;
		if (board[i][j] == ' ')
		{
			board[i][j] = '*';
			break;
		}
	}
}
//判斷是否有一方已經贏下對局
char judge_wins(char board[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;
	char ret = 0;
	//檢查行
	for (i = 0; i < row; ++i)
	{
		ret = 1;
		for (j = 0; j < col - 1; ++j)
		{
			if (board[i][j] == board[i][j + 1] && board[i][j] != ' ' )
				;
			else
			{
				ret = 0;
				break;
			}			
		}
		if (ret)
			return board[i][j];
	}
	//檢查列
	for (j = 0; j < col; j++)
	{
		ret = 1;
		for (i = 0; i < row - 1; i++)
		{
			if (board[i][j] == board[i + 1][j] && board[i][j] != ' ')
				;
			else
			{
				ret = 0;
				break;
			}			
		}
		if (ret)
			return board[i][j];
	}
	//檢查對角線
	ret = 1;
	for (i = 0,j = 0; i < row - 1 && j < col -1; i++,j++)
	{
		if (board[i][i] == board[i + 1][i + 1] && board[i][i] != ' ')
			;
		else
		{
			ret = 0;
			break;
		}
	}
	if (ret)
		return board[i][i];
	//檢查對角線
	ret = 1;
	for (i = 0,j = col - 1; i < row - 1 && j > 0; i++,j--)
	{
		if (board[i][j] == board[i + 1][j - 1] && board[i][j] != ' ')
			;
		else
		{
			ret = 0;
			break;
		}
	}
	if (ret)
		return board[i][j];
	//檢查是否平局
	if (is_full(board, row, col))
		return 'Y';
	//繼續
	return 0;
}
//檢查是否棋盤是否已滿
int is_full(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++)
		{
			if (board[i][j] == ' ')
				return 0;
		}
	}
	return 1;
}