井字棋小游戏实现

根据http://www.guokr.com/article/4754/上的一篇文章策略实现。因为玩家最多是平局，所以效果还是达到了。

下面是源代码 

#include 
#include "stdlib.h"
#include "time.h"
#include      
#include 
#define MAN 1 
#define COM -1
#define MAN_WIN 100
#define COM_WIN -100
#define DRAW 0 //平局 
#define NONE 0  
#define POSITION 9
#define STEP 9
#define random(x) (rand()%(x)) //产生随机数

int board[10];//棋盘 初始默认值为0
int win_place_sum;
int angle[4] = { 1,3,7,9 };
int edge[4] = { 2,4,6,8 };

//是否赢了 
int isWin(int player)
{
if (board[1] == player && board[1] == board[2] && board[2] == board[3]) return(player);
if (board[4] == player && board[4] == board[5] && board[5] == board[6]) return(player);
if (board[7] == player && board[7] == board[8] && board[8] == board[9]) return(player);
if (board[1] == player && board[1] == board[4] && board[4] == board[7]) return(player);
if (board[2] == player && board[2] == board[5] && board[5] == board[8]) return(player);
if (board[3] == player && board[3] == board[6] && board[6] == board[9]) return(player);
if (board[1] == player && board[1] == board[5] && board[5] == board[9]) return(player);
if (board[3] == player && board[3] == board[5] && board[5] == board[7]) return(player);
//没人赢返回0
return NONE;
}
int isAngle(int position)
{
if (position == 1 || position == 3 || position == 7 || position == 9)
return position;
return 0;
}

int isEdge(int position)
{
if (position == 2 || position == 4 || position == 6 || position == 8)
return position;
return 0;
}

//两子成线，返回一个必须要下的位置 
int checkWinning(int player) {
int i;
int win_place = 10;
win_place_sum = 0;


for (i = 1; i < 10; i++) {
if (board[i] == NONE) {
board[i] = player; //先假设该处有子进行判断 
if (isWin(player) == player) {
board[i] = 0;
win_place = i;
win_place_sum++;
}
board[i] = 0;
}
}
return win_place;//返回下棋的位置
}


//电脑哥们进行下棋
int com_play(int step , int lastPosition)
{
int i;

//随机数
int ranNumber; 


//设置随机数种子
srand((unsigned int)time(NULL));


//第一步电脑走的位置
int lastComPosition = 0;


//能赢的地方
int win_place = 10;



int max_win_times = 0;
//如果第一步，那么电脑先占角
if ( ( step == 1 ) && (lastPosition == 0 )) {
ranNumber = random(4);
board[angle[ranNumber]] = COM;
return angle[ranNumber];
}
else if (step == 3)
{

//第二步玩家走角
if (isAngle(lastPosition) > 0)
{
for (i = 0; i < 4; i++)
{
if (board[angle[i]] == COM)
{
lastComPosition = angle[i];
// printf("第一步电脑走的是%d", lastComPosition);
break; 
}
}
//如果走的是靠近边的角,就占对角
if ((lastPosition + lastComPosition) != 10)
{
if (board[10 - lastComPosition] == NONE)
{
board[10 - lastComPosition] = COM;
return 10 - lastComPosition;
}
else
{
printf("出错了——1");
return 0;
}
}
//如果走的是对角,那么就占其他的角
else
{
while (true)
{
ranNumber = random(4);
if (board[angle[ranNumber]] == NONE)
{
board[angle[ranNumber]] = COM;
return angle[ranNumber];
}
}
}
}


//第二步玩家走的是边
else if( isEdge(lastPosition) > 0 ) 
{
if(board[5] == NONE)
{
board[5] = COM;
return 5; 
}
else
{
printf("中间5被占用了 ...");
return 0; 
}


}
//如果走的是正中间 ，那么电脑走对角
else if(lastPosition == 5 )
{
for (i = 0; i < 4; i++)
{
if (board[angle[i]] == COM)
{
lastComPosition = angle[i];
// printf("第一步电脑走的是%d", lastComPosition);
break;
}
}
if (board[10 - lastComPosition] == NONE)
{
board[10 - lastComPosition] = COM;
return 10 - lastComPosition;
}
else
{
printf("出错了——2");
return 0;
}
}

}


else if (step == 5)
{
win_place = checkWinning(COM);//电脑两子成线
if (win_place < 10)
{
board[win_place] = COM;
return win_place;
}


win_place = checkWinning(MAN); //玩家的棋两子成线
if (win_place < 10)
{
board[win_place] = COM;
return win_place;
}
//如果没有能赢的地方,则占角
else
{
for (i = 0; i < 4; i++)
{
if (board[angle[i]] == NONE)
{
board[angle[i]] = COM;

if (checkWinning(COM) < 10 && max_win_times < win_place_sum)
{
max_win_times = win_place_sum; //能赢的次数
win_place = angle[i];
}


board[angle[i]] = NONE;
}
}

board[win_place] = COM;
}


}
else if(step == 2 )
{
if (board[5] == NONE)
{
board[5] = COM;
return 5;
}


else
while (true)
{
ranNumber = random(4);
if (board[angle[ranNumber]] == NONE )
{
board[angle[ranNumber]] = COM;
return angle[ranNumber];
}
}
}


else
{
win_place = checkWinning(COM);//电脑两子成线
if (win_place < 10)
{
board[win_place] = COM;
return win_place;
}


win_place = checkWinning(MAN); //玩家的棋两子成线
if (win_place < 10)
{
board[win_place] = COM;
return win_place;
}


for (i = 1; i <= 9; i++) {
if (board[i] == NONE)
{
board[i] = COM;
printf("最后一步？？");
return i;
}
}


}
printf("COM-error");
return 10;
}






//玩家进行下棋
int person_play()
{
int row;
int col;
int index;


do
{
printf("亲~轮到你走一步了!!!请输入行坐标和列坐标 如  1 1 为左上角第一个点  2 2 为正中间的点   （1和1之间有个空格，否则错误）");
scanf("%d", &row);
scanf("%d", &col);
index = (row - 1) * 3 + col;




if (board[index] == NONE)
{
board[index] = MAN;
return index;
}
printf("输入的下标不合法 ，越界或者此处已经有棋子存在 !!!! 请重新输入下标 ：）");


} while (true);


printf("MAN-error");
return 10;
}


//画棋盘
void display()
{
char board_dis[10] = { "" };
int i;
for (i = 1; i < 10; i++)
{
if (board[i] == COM) {
board_dis[i] = 'X';
}
if (board[i] == MAN) {
board_dis[i] = 'O';
}


}
for (i = 0; i < 10; i++) {
printf("-");
}
printf("\n|");
for (i = 1; i <= 3; i++) {
printf("%c |", board_dis[i]);
}
printf("\n");
for (i = 0; i < 10; i++) {
printf("-");
}
printf("\n|");
for (i = 4; i <= 6; i++) {
printf("%c |", board_dis[i]);
}
printf("\n");
for (i = 0; i < 10; i++) {
printf("-");
}
printf("\n|");
for (i = 7; i <= 9; i++) {
printf("%c |", board_dis[i]);
}
printf("\n");
for (i = 0; i < 10; i++) {
printf("-");
}
printf("\n");
}

void main()
{
char c;
int i;
int step = 1; 
int lastPosition = 0;


for (i = 0; i<30; i++)
printf("*");
printf("\n*hello,welcome to this game!!*\n");
for (i = 0; i<30; i++)
printf("*");
printf("\nDo you want to play first? y -你先走  , n-电脑先走");
for (c = getche(); c != 'Y'&&c != 'y'&&c != 'N'&&c != 'n'; c = getche());
if (c == 'Y' || c == 'y') 
{ 
display();
for (step = 1; step <= STEP; )
{
lastPosition = person_play();
display();
if (MAN == isWin(MAN))
{
printf("恭喜您 ， 您获胜了 ");
break;
}
step++;
if (step == 10) {
break;
}
lastPosition = com_play(step,lastPosition);
display();


if (COM == isWin(COM))
{
printf("很遗憾 ，电脑获胜了 ");
break;
}
step++;
}
if (isWin(COM) == NONE && isWin(MAN) == NONE && step == 10)
{
printf("平局");
}


}


else if (c == 'N' || c == 'n')
{
for (step = 1; step <= STEP; )
{


lastPosition = com_play(step, lastPosition);
display();


if (COM == isWin(COM))
{
printf("很遗憾 ，电脑获胜了 ");
break;
}
step++;


if (step == 10) {
break;
}
lastPosition = person_play();

if (MAN == isWin(MAN))
{
printf("恭喜您 ， 您获胜了 ");
break;
}
step++;

}
if (isWin(COM) == NONE && isWin(MAN) == NONE && step == 10)
{
printf("平局");
}


}


getch();
}