21.三子棋

首先我们应该创建三个项目:
第一个是：用来测试三子棋游戏，main主函数写在这里

第二个是：用作函数定义，用来执行游戏

第三个是：用作函数声明

给大家展示代码：

首先是test.c模块的：

#define _CRT_SECURE_NO_WARINGS 1
#include "chessboard.h"
#include<stdio.h>
void menu()
{
	printf("------------1.play\n");
	printf("------------0.exit\n");
}
void game()
{
	//创建棋盘
	char chessboard[ROW][COL] = { 0 };//
	Initchessboard(chessboard, ROW, COL);//初始化棋盘
	Displaychessboard(chessboard, ROW, COL);//打印棋盘
	char ret;//接收
	while (1)
	{
		peoplemove(chessboard, ROW, COL);//玩家走
		Displaychessboard(chessboard, ROW, COL);//打印棋盘
		ret = iswin(chessboard,ROW,COL);
			if (ret != 'C')
			{
				break;
			}
		computermove(chessboard, ROW, COL);//电脑走
		Displaychessboard(chessboard, ROW, COL);//打印棋盘
		ret = iswin(chessboard,ROW,COL);
		if (ret != 'C')
		{
			break;
		}
	}
	if (ret == '*')
	{
		printf("玩家赢\n");
	}
	else if (ret == '#')
	{
		printf("电脑赢\n");
	}
	else if(ret=='M')
	{
		printf("平局\n");
	}
}
void test()
{
	int input = 0;
	do
	{
		menu();
		printf("请输入选项:\n");
		scanf("%d", &input);
		switch (input)
		{
		case 1:
			game();
			break;
		case 0:
			printf("退出游戏\n");
			break;
		default:
			printf("非法输入\n");
			break;
		}

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

chessboard游戏执行模块：

#define _CRT_SECURE_NO_WARINGS 1
#include "chessboard.h"
void Initchessboard(char chessboard[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;
	for (i = 0; i < row; i++)
	{
		for (j = 0; j < col; j++)
		{
			chessboard[i][j] = ' ';
		}
	}
}
void Displaychessboard(char chessboard[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 ", chessboard[i][j]);
			if (j < col - 1)
			{
				printf("|");
			}
		}
		printf("\n");
		if (i < row - 1)
		{
			for (j = 0; j < col; j++)
			{
				printf("----");
			}
			printf("\n");
		}
	}
}

//玩家下棋
void peoplemove(char chessboard[ROW][COL], int row, int col)
{
	int x = 0;
	int y = 0;
	printf("请输入你要下的坐标\n");
	scanf("%d %d", &x, &y);
	if (x >= 1 && x <= row && y >= 1 && y <= col)
	{
		chessboard[x - 1][y - 1] = '*';
	}
}

//电脑下棋
void computermove(char chessboard[ROW][COL], int row, int col)
{
	int x = 0;
	int y = 0;
	printf("电脑走\n");
	while (1)
	{
		x = rand() % 3;//0 1 2
		y = rand() % 3;//0 1 2
		if (chessboard[x][y] == ' ')
		{
			chessboard[x][y] = '#';
			break;
		}
	}
}
//判断平局的情况
char isfull(char chessboard[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 (chessboard[i][j] == ' ')
			{
				return 0;
			}
		}
	}
	return 1;
}
//判断赢的情况
char iswin(char chessboard[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;
	for (i = 0; i < row; i++)
	{
		if (chessboard[i][0] == chessboard[i][1] && chessboard[i][1] == chessboard[i][2] && chessboard[i][1] != ' ')
		{
			return chessboard[i][1];
			break;
		}
		if (chessboard[0][i] == chessboard[1][i] && chessboard[1][i] == chessboard[2][i] && chessboard[1][i] != ' ')
		{
			return chessboard[i][1];
			break;
		}
	}
	if (chessboard[0][0] == chessboard[1][1] && chessboard[1][1] == chessboard[2][2] && chessboard[1][1] != ' ')
	{
		return chessboard[1][1];
	}
	if (chessboard[0][2] == chessboard[1][1] && chessboard[1][1] == chessboard[2][0] && chessboard[1][1] != ' ')
	{
		return chessboard[1][1];
	}
	//判断是否平局
	if (1 == isfull(chessboard, ROW, COL))
	{
		return 'M';
	}
	return 'C';
}

 chessboard.h函数声明模块：

#define ROW 3
#define COL 3
#include<stdio.h>
//初始化棋盘
void Initchessboard(char chessboard[ROW][COL], int row, int col);
//打印棋盘
void Displaychessboard(char chessboard[ROW][COL], int row, int col);
//玩家下棋
void peoplemove(char chessboard[ROW][COL], int row, int col);
void computermove(char chessboard[ROW][COL], int row, int col);

//判断输赢
//赢  *
//输  #
//平局 M
//继续 C
char iswin(char chessboard[ROW][COL],int row,int col);
//判断棋盘满了平局

char isfull(char chessboard[ROW][COL], int row, int col);

如有错误，请大佬指出！