C语言代码实现：三子棋小游戏

//game.h
#pragma once

#include<stdio.h>
#include<stdlib.h>
#include<time.h>

#define ROW 3
#define COL 3

//初始化棋盘
void InitBoard(char board[ROW][COL], int row, int col);//声明
//打印棋盘
void DisplayBoard(char board[ROW][COL], int row, int col);

//玩家下棋
void PlayerMove(char board[ROW][COL], int row, int col);
//电脑下棋
void ComputerMove(char board[ROW][COL], int row, int col);

//判断输赢
char IsWin(char board[ROW][COL], int row, int col);
/*返回4种状态*/

//game.c
#define _CRT_SECURE_NO_WARNINGS 1
#include"game.h"

//初始化棋盘
void InitBoard(char board[ROW][COL], int row, int col)//定义
{
	int i = 0;
	int j = 0;
	for (i = 0; i < ROW; i++)
	{
		for (j = 0; j < COL; j++)
			board[i][j] = ' ';
	}
}


//打印棋盘
void DisplayBoard(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++)
		{
			//1.打印一行的数据
			printf(" %c ", board[i][j]);
			if (j < col - 1)
				printf("|");
		}
		printf("\n");
			//2.打印分割行
		if (i < row - 1)
		{
			for (j = 0; j < col; j++)
			{
				printf("---");
				if (j < col - 1)
					printf("|");
			}
			printf("\n");
		}
	}
}


//玩家下棋
void PlayerMove(char board[ROW][COL], int row, int col)
{
	int x = 0;
	int y = 0;
	printf("玩家走:>\n");
	
	while (1)
	{
		printf("请输入要下的坐标:>");
		scanf("%d%d", &x, &y);

		//判断x，y的合法性
		if (x >= 1 && x <= ROW && y >= 1 && y <= COL)
		{
			if (board[x - 1][y - 1] == ' ')
			{
				board[x - 1][y - 1] = '*'; 
				break;
			}
			else
				printf("该坐标已被占用！\n");
		}
		else
			printf("坐标非法，请重新输入！\n");
	}
	
}


//电脑下棋
void ComputerMove(char board[ROW][COL], int row, int col)
{
	int x = 0;
	int y = 0;
	printf("电脑走:>\n");

	while (1) 
	{
		x = rand() % row;
		y = rand() % col;
		if (board[x - 1][y - 1] == ' ')
		{
			board[x - 1][y - 1] = '#';
			break;
		}
		//不合法就会重新生成
	}
}


//判断输赢
/*返回4种状态*/
int IsFull(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;
}
char IsWin(char board[ROW][COL], int row, int col)
{
	int i = 0;
	for (i = 0; i < row; i++)
	{
		if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][0] != ' ')
			return board[i][0];
	}
	for (i = 0; i < col; i++)
	{
		if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[0][i] != ' ')
			return board[0][i];
	}

	if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[0][0] != ' ')
		return board[0][0];
	if (board[2][0] == board[1][1] && board[1][1] == board[0][2] && board[1][1] != ' ')
		return board[1][1];
	if (1 == IsFull(board, ROW, COL))
		return 'Q';//平局
	
	return 'C';//继续

}

//test.c
#define _CRT_SECURE_NO_WARNINGS 1

#include "game.h"

//三子棋项目
//test.c

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

void game()
{
	char ret = 0;
	char board[ROW][COL] = { 0 };

	//初始化棋盘
	InitBoard(board, ROW, COL);//调用
	//打印棋盘
	DisplayBoard(board, ROW, COL);
	//下棋+判断输赢
	while (1)
	{
		//玩家下棋
		PlayerMove(board, ROW, COL);
		DisplayBoard(board, ROW, COL);
			//判断玩家是否赢
		ret = IsWin(board, ROW, COL);
		if (ret != 'C')
			break;
		//电脑下棋
		ComputerMove(board, ROW, COL);
		DisplayBoard(board, ROW, COL);
			//判断电脑是否赢
		ret = IsWin(board, ROW, COL);
		if (ret != 'C')
			break;
	}

	if (ret == '*')
		printf("玩家赢！\n");
	else if (ret == '#')
		printf("电脑赢！\n");
	else
		printf("平局。\n");
	
}

void test()//测试函数
{
	srand((unsigned int)time(NULL));
	int input = 0;
	do {
		menu();
		printf("请选择:>");
		scanf("%d", &input);

		switch (input)
		{
		case 1:
			game();
			break;
		case 0:
			printf("退出游戏！\n");
			break;
		default:
			printf("选择错误，请重新选择！\n");
			break;
		}
	} while (input);
	/*当input != 0的时候，do...while循环一直进行，当input = 0时，循环终止*/
}

int main()
{
	test();
	return 0;
}