1.菜單

我們先進行菜單打印的實現，如下：

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

菜單要求我們進行輸出1/0，但是我們要考慮玩家可能輸錯的情況所以我們用switch語句來對玩家的輸入進行一個反饋，如下：

int input = 0;do{menu();printf("請輸入(1/0):");scanf("%d", &input);switch (input){case 1:printf("開始游戲\n");game();break;case 0:printf("退出游戲\n");break;default:printf("輸入錯誤，請重新輸入\n");break;}} while (input);

上面這段代碼是在主函數中實現的，當然你也可將其打包到一個函數中，這里就不做展示了。

當玩家輸入1時，進入游戲，下面我們來實現game里的內容。

2.初始化棋盤與打印棋盤

玩家要想玩三子棋首先肯定要有一個棋盤，三子棋的棋盤一共有9個空位，玩家將在這些空位上下棋，在游戲的過程中，我們是需要對玩家和電腦的下棋情況進行收錄的，所以我們先創建一個數組，在里面全部初始化為 空格 ，實現如下：

void InitBoard(char board[ROW][COL], int row, int col)//初始化棋盤 {int i, j;for (i = 0; i < row; i++){for (j = 0; j < col; j++){board[i][j] = ' ';}} } void game() {int ret = 1;int n = 0;char board[ROW][COL] = { 0 };InitBoard(board, ROW, COL);DisplayBoard(board, ROW, COL); }

這里要說明一下，ROW代表的是行，COL代表的是列，這是提前用define設置好的，后面會提到，row和col也是一樣的意思，傳過來是為了方便。

之后是打印棋盤，思路其實還是蠻簡單的，循環加判斷，相信大家都是可以理解的，就不細說明了，實現如下：

void DisplayBoard(char board[ROW][COL], int row, int col)//打印棋盤 {int i, j;for (i = 0; i < row; i++){for (j = 0; j < col; j++){printf(" %c ", board[i][j]);if (j < col - 1){printf("|");} //“ |”這是一次循環} //當打印最后一次時不打印“|”//打印出來是 | | printf("\n");if (i < row - 1){for (j = 0; j < col; j++){printf("---");if (j < col - 1){printf("|");//“---|”是一次循環} //打印最后一次時不打印“|”} //打印出來是---|---|---}printf("\n");// 上面的兩行加一起是一次循環} //最后一次循環不打印---| }//打印出來是這樣的效果 // | | //---|---|--- // | | //---|---|--- // | |

而設置ROW和COL的目的就是將棋盤的打印變得可控，可以操控棋盤的大小。

3.玩家下棋和電腦下棋

玩家下棋很簡單，玩家輸入坐標（1~3）（1~3）后判斷此位置是否有棋子，如果有則讓其在輸入一次，如果沒有則記錄下來，放到之前創建的數組board里。

void PlayMove(char board[ROW][COL], int row, int col)//玩家下棋 {int x, y;printf("玩家輸入\n");while (1){printf("請輸入坐標:");scanf("%d %d", &x, &y);if (x > 0 && x <= row && y > 0 && y <= col&&board[x - 1][y - 1] == ' '){board[x - 1][y - 1] = '*';break;}else if (x <= 0 || x > row || y <= 0 || y > col){printf("坐標非法，請重新輸入\n");}else if (board[x - 1][y - 1] != ' '){printf("該坐標已被占用，請選擇其他坐標\n");}} }

電腦下棋我們將簡單模式設置為隨機下棋，下面是實現：

void ComputerMove0(char board[ROW][COL], int row, int col) {Sleep(200);printf("電腦下棋\n");int x, y;while (1){x = rand() % row + 1;y = rand() % col + 1;if (board[x][y] == ' '){board[x][y] = '#';break;}} }

隨機數的概念在《猜數字游戲》這篇博客里有說，這里就不細說明了。

簡單的人機肯定不是我們想要的，那么復雜的人機該怎么實現呢？

很簡單，三子棋玩的好的小伙伴們都知道，如果雙方都是高手在不出失誤的情況下是只能平局的，實現起來也好辦，把情況都列舉出來就好了，但是這樣不僅玩家沒有良好的游戲體驗，代碼也繁重，所以我們僅讓電腦判斷：

（下面是按照優先序排列的）

1）如果己方（電腦）在橫排、豎排、斜排已有兩個棋子，如果剩下的位置沒有棋子，則下在此處

2）如果對方（玩家）在橫排、豎排、斜排已有兩個棋子，如果剩下的位置沒有棋子，則下在此處

3）如果以上情況都沒有那么中間優先下，沒有則下四角，如果都沒有空位，那么隨機下。

下面是實現：

int ComputerMove1(char board[ROW][COL], int row, int col) {int i = 0, j = 0, m = 1,n = 1;printf("電腦輸入\n");while(i < row)//判斷電腦是否有兩個{if (board[i][0] == '#' && board[i][1] == '#' && board[i][2] == ' '){board[i][2] = '#';return 1;}if (board[i][0] == '#' && board[i][2] == '#' && board[i][1] == ' '){board[i][1] = '#';return 1;}if (board[i][1] == '#' && board[i][2] == '#' && board[i][0] == ' '){board[i][0] = '#';return 1;}if (board[0][j] == '#' && board[1][j] == '#' && board[2][j] == ' '){board[2][j] = '#';return 1;}if (board[0][j] == '#' && board[2][j] == '#' && board[1][j] == ' '){board[1][j] = '#';return 1;}if (board[1][j] == '#' && board[2][j] == '#' && board[0][j] == ' '){board[0][j] = '#';return 1;}i++;j++;}i = 0;j = 0;while (i < col)//判斷玩家是否有兩個{if (board[i][0] == '*' && board[i][1] == '*' && board[i][2] == ' '){board[i][2] = '#';return 1;}if (board[i][0] == '*' && board[i][2] == '*' && board[i][1] == ' '){board[i][1] = '#';return 1;}if (board[i][1] == '*' && board[i][2] == '*' && board[i][0] == ' '){board[i][0] = '#';return 1;}if (board[0][j] == '*' && board[1][j] == '*' && board[2][j] == ' '){board[2][j] = '#';return 1;}if (board[0][j] == '*' && board[2][j] == '*' && board[1][j] == ' '){board[1][j] = '#';return 1;}if (board[1][j] == '*' && board[2][j] == '*' && board[0][j] == ' '){board[0][j] = '#';return 1;}i++;j++;}if (board[1][1] == ' ')//中間{board[1][1] = '#';return 1;}else if (board[1][1] != ' ')//四角{if (board[0][0] == ' '){board[0][0] = '#';return 1;}else if (board[0][2] == ' '){board[0][2] = '#';return 1;}else if (board[2][0] == ' '){board[2][0] = '#';return 1;}else if (board[2][2] == ' '){board[2][2] = '#';return 1;}}else//隨機{int x, y;while (1){x = rand() % row + 1;y = rand() % col + 1;if (board[x][y] == ' '){board[x][y] = '#';break;}}return 1;} }

這樣一個困難的電腦就產生了。

4.判斷輸贏

我們需要在每次下棋（玩家或電腦）后進行判斷輸贏，如果玩家有三顆棋子連在一起，則玩家贏，如果電腦有三顆連在一起則電腦贏，如果棋盤滿了也沒有輸贏則平局。

如果贏了或者平局則返回0，在game里判斷是否返回0，如果是則結束本場游戲

下面是實現：

InitBoard(board, ROW, COL);//初始化棋盤 DisplayBoard(board, ROW, COL);//打印棋盤 while (1) {PlayMove(board, ROW, COL);//玩家下棋DisplayBoard(board, ROW, COL);//打印棋盤ret = who_win(board, ROW, COL);//判斷輸贏if (ret == 0)break;ComputerMove0(board, ROW, COL);//電腦下棋DisplayBoard(board, ROW, COL);//打印棋盤ret = who_win(board, ROW, COL);//判斷輸贏if (ret == 0)break; } int who_win(char board[ROW][COL],int row, int col) {int i, j, count = 0;for (i = 0; i < row; i++){if (board[i][0] == '*' && board[i][1] == '*' && board[i][2] == '*'){printf("玩家贏\n");Sleep(2000);system("cls");return 0;}if (board[i][0] == '#' && board[i][1] == '#' && board[i][2] == '#'){printf("電腦贏\n");Sleep(2000);system("cls");return 0;}}for (i = 0; i < col; i++){if (board[0][i] == '*' && board[1][i] == '*' && board[2][i] == '*'){printf("玩家贏\n");Sleep(2000);system("cls");return 0;}if (board[0][i] == '#' && board[1][i] == '#' && board[2][i] == '#'){printf("電腦贏\n");Sleep(2000);system("cls");return 0;}}if ((board[0][0] == '*' && board[1][1] == '*' && board[2][2] == '*') || (board[0][2] == '*' && board[1][1] == '*' && board[2][0] == '*')){printf("玩家贏\n");Sleep(2000);system("cls");return 0;}if ((board[0][0] == '#' && board[1][1] == '#' && board[2][2] == '#') || (board[0][2] == '#' && board[1][1] == '#' && board[2][0] == '#')){printf("電腦贏\n");Sleep(2000);system("cls");return 0;}for (i = 0; i < row; i++){for (j = 0; j < col; j++){if (board[i][j] != ' '){count++;}}}if (count == row * col){printf("平局了\n");Sleep(2000);system("cls");return 0;}return 1; }

還有難度的選擇，判斷即可，下面是源代碼（我是分文件寫的）：

主文件：

#define _CRT_SECURE_NO_WARNINGS #include "game.h" void menu() {printf("**********************************************\n");printf("************ 1.play ************\n");printf("************ 0.exit ************\n");printf("**********************************************\n"); }void game() {int ret = 1;int n = 0;char board[ROW][COL] = { 0 };printf("請選擇難度(0.簡單/1.困難):");scanf("%d", &n);if (n == 0){InitBoard(board, ROW, COL);//初始化棋盤DisplayBoard(board, ROW, COL);//打印棋盤while (1){PlayMove(board, ROW, COL);//玩家下棋DisplayBoard(board, ROW, COL);//棋盤ret = who_win(board, ROW, COL);//判斷輸贏if (ret == 0)break;ComputerMove0(board, ROW, COL);//電腦下棋DisplayBoard(board, ROW, COL);//棋盤ret = who_win(board, ROW, COL);//判斷輸贏if (ret == 0)break;}}else if (n == 1){InitBoard(board, ROW, COL);DisplayBoard(board, ROW, COL);while (1){PlayMove(board, ROW, COL);DisplayBoard(board, ROW, COL);ret = who_win(board, ROW, COL);if (ret == 0)break;ComputerMove1(board, ROW, COL);DisplayBoard(board, ROW, COL);ret = who_win(board, ROW, COL);if (ret == 0)break;}}else{printf("輸入錯誤，默認選簡單\n");InitBoard(board, ROW, COL);DisplayBoard(board, ROW, COL);while (1){PlayMove(board, ROW, COL);DisplayBoard(board, ROW, COL);ret = who_win(board, ROW, COL);if (ret == 0)break;ComputerMove0(board, ROW, COL);DisplayBoard(board, ROW, COL);ret = who_win(board, ROW, COL);if (ret == 0)break;}} } int main() {srand((unsigned int)time(NULL));int input = 0;do{menu();printf("請輸入(1/0):");scanf("%d", &input);switch (input){case 1:printf("開始游戲\n");game();break;case 0:printf("退出游戲\n");break;default:printf("輸入錯誤，請重新輸入\n");break;}} while (input);return 0; }

game.h頭文件：

#pragma once #define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <time.h> #include <windows.h>#define ROW 3 #define COL 3void InitBoard(char board[ROW][COL], int row, int col); void DisplayBoard(char board[ROW][COL], int row, int col); void PlayMove(char board[ROW][COL], int row, int col); void ComputerMove0(char board[ROW][COL], int row, int col); int ComputerMove1(char board[ROW][COL], int row, int col); int who_win(char board[ROW][COL], int row, int col);

game.cpp存放函數實現的文件：

#include "game.h"void InitBoard(char board[ROW][COL], int row, int col)//初始化棋盤 {int i, j;for (i = 0; i < row; i++){for (j = 0; j < col; j++){board[i][j] = ' ';}} }void DisplayBoard(char board[ROW][COL], int row, int col)//打印棋盤 {int i, j;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 < col; j++){printf("---");if (j < col - 1){printf("|");}}}printf("\n");} }void PlayMove(char board[ROW][COL], int row, int col)//玩家下棋 {int x, y;printf("玩家輸入\n");while (1){printf("請輸入坐標:");scanf("%d %d", &x, &y);if (x > 0 && x <= row && y > 0 && y <= col&&board[x - 1][y - 1] == ' '){board[x - 1][y - 1] = '*';break;}else if (x <= 0 || x > row || y <= 0 || y > col){printf("坐標非法，請重新輸入\n");}else if (board[x - 1][y - 1] != ' '){printf("該坐標已被占用，請選擇其他坐標\n");}} }void ComputerMove0(char board[ROW][COL], int row, int col)//簡單電腦 {Sleep(200);printf("電腦下棋\n");int x, y;while (1){x = rand() % row + 1;y = rand() % col + 1;if (board[x][y] == ' '){board[x][y] = '#';break;}} }int ComputerMove1(char board[ROW][COL], int row, int col)//困難電腦 {int i = 0, j = 0, m = 1,n = 1;printf("電腦輸入\n");while(i < row){if (board[i][0] == '#' && board[i][1] == '#' && board[i][2] == ' '){board[i][2] = '#';return 1;}if (board[i][0] == '#' && board[i][2] == '#' && board[i][1] == ' '){board[i][1] = '#';return 1;}if (board[i][1] == '#' && board[i][2] == '#' && board[i][0] == ' '){board[i][0] = '#';return 1;}if (board[0][j] == '#' && board[1][j] == '#' && board[2][j] == ' '){board[2][j] = '#';return 1;}if (board[0][j] == '#' && board[2][j] == '#' && board[1][j] == ' '){board[1][j] = '#';return 1;}if (board[1][j] == '#' && board[2][j] == '#' && board[0][j] == ' '){board[0][j] = '#';return 1;}i++;j++;}i = 0;j = 0;while (i < col){if (board[i][0] == '*' && board[i][1] == '*' && board[i][2] == ' '){board[i][2] = '#';return 1;}if (board[i][0] == '*' && board[i][2] == '*' && board[i][1] == ' '){board[i][1] = '#';return 1;}if (board[i][1] == '*' && board[i][2] == '*' && board[i][0] == ' '){board[i][0] = '#';return 1;}if (board[0][j] == '*' && board[1][j] == '*' && board[2][j] == ' '){board[2][j] = '#';return 1;}if (board[0][j] == '*' && board[2][j] == '*' && board[1][j] == ' '){board[1][j] = '#';return 1;}if (board[1][j] == '*' && board[2][j] == '*' && board[0][j] == ' '){board[0][j] = '#';return 1;}i++;j++;}if (board[1][1] == ' '){board[1][1] = '#';return 1;}else if (board[1][1] != ' '){if (board[0][0] == ' '){board[0][0] = '#';return 1;}else if (board[0][2] == ' '){board[0][2] = '#';return 1;}else if (board[2][0] == ' '){board[2][0] = '#';return 1;}else if (board[2][2] == ' '){board[2][2] = '#';return 1;}}else{int x, y;while (1){x = rand() % row + 1;y = rand() % col + 1;if (board[x][y] == ' '){board[x][y] = '#';break;}}return 1;} }int who_win(char board[ROW][COL],int row, int col)//判斷輸贏 {int i, j, count = 0;for (i = 0; i < row; i++){if (board[i][0] == '*' && board[i][1] == '*' && board[i][2] == '*'){printf("玩家贏\n");Sleep(2000);system("cls");return 0;}if (board[i][0] == '#' && board[i][1] == '#' && board[i][2] == '#'){printf("電腦贏\n");Sleep(2000);system("cls");return 0;}}for (i = 0; i < col; i++){if (board[0][i] == '*' && board[1][i] == '*' && board[2][i] == '*'){printf("玩家贏\n");Sleep(2000);system("cls");return 0;}if (board[0][i] == '#' && board[1][i] == '#' && board[2][i] == '#'){printf("電腦贏\n");Sleep(2000);system("cls");return 0;}}if ((board[0][0] == '*' && board[1][1] == '*' && board[2][2] == '*') || (board[0][2] == '*' && board[1][1] == '*' && board[2][0] == '*')){printf("玩家贏\n");Sleep(2000);system("cls");return 0;}if ((board[0][0] == '#' && board[1][1] == '#' && board[2][2] == '#') || (board[0][2] == '#' && board[1][1] == '#' && board[2][0] == '#')){printf("電腦贏\n");Sleep(2000);system("cls");return 0;}for (i = 0; i < row; i++){for (j = 0; j < col; j++){if (board[i][j] != ' '){count++;}}}if (count == row * col){printf("平局了\n");Sleep(2000);system("cls");return 0;}return 1; }

以上就是三子棋的全部內容了。

總結

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