一、游戏步骤

三子棋的实现其实很简单，只要思路理清，然后按照步骤一步一步的用代码实现就可以了。具体步骤如下：

1、游戏开始。（打印一个游戏菜单）

2、打印游戏棋盘。

3、玩家走棋，判断该坐标是否有效，无效，提示重新输入。有效，打印棋盘；然后判赢，赢，游戏结束；

4、电脑走棋，打印棋盘，并且判赢。赢，游戏结束；

步骤如图：

二、代码实现：

1、主要实现：game.c

代码如下：

[code]#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("此位被占了请重新输入：\n");
}
}
else
{
printf("垃圾输入错误：\n");
}
}

}

void computerRemove(char board[ROW][COL], int row, int col)
{
int x = -1, y = -1;
printf("电脑走：\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++) // 判断每一行是否相等
{
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++) // 判断每一列是否相等
{
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++) // 判断每对角线是否相等
{
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++) // 判断每对角线是否相等
{
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，判断内容是什么
{
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("玩家赢\n");
else if (win == 'X')
printf("电脑赢\n");
else
printf("平局\n");
}

2、头文件 game.h

代码如下：

[code]#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); // 打印棋盘
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); // 电脑走棋
char IsWinGame(char board[ROW][COL], int row, int col); // 判赢
void find_win(char win); // 判赢条件

3、具体实现源文件：game.c

代码如下：

[code]#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("请选择<1,0>: ");
scanf("%d", &input);
switch (input)
{
case 1:
Game();
break;
case 0:
break;
default:
printf("输入错误：\n");
fflush(stdin);//清空输入缓冲区，避免输入字符型数据而死循环
break;
}
} while (input);

system("pause");
return 0;
}