[C++知识库]C语言实现井字棋

??我们设计一个二维数组去储存当前的棋盘状态，然后利用Displayboard函数来打印起来，这里打印的要点是打印一行数据行，打印一行分割行，如果到了最后一行，就不打印分割行，打印数据行时，一次打印一个 " %c “，如果不是最后一个元素，就再打印一个”|"，打印分割行时，一次打印一个"—“如果不是最后一个元素，就再打印一个"|"。
??我们游戏的逻辑是初始化棋盘，打印棋盘，人下棋，打印棋盘，判断是否游戏结束，电脑下棋，打印棋盘，判断是否游戏结束，然后回到人下棋过程，结束游戏后，根据iswin函数的返回值来判断谁赢谁输还是平局。
??判断输赢的逻辑是遍历行，遍历列，遍历主对角线，遍历反对角线，如果都判断不出输赢，那么就返回C表示游戏继续。

//game.h
#pragma once

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <Windows.h>
#define ROW 3
#define COL 3

void InitBoard(char arr[ROW][COL], int row, int col);

void Displayboard(char arr[ROW][COL], int row, int col);

void Playermove(char arr[ROW][COL], int row, int col);

void Computermove(char board[ROW][COL], int row, int col);


char iswin(char board[ROW][COL],int row,int col);
//要能返回四种状态
//玩家赢 *
//电脑赢 #
//平局 Q
//继续 C

void game();

//game.c

#include "game.h"

void game()
{
	//棋盘数组
	char board[ROW][COL];
	//初始化棋盘
	InitBoard(board, ROW, COL);
	//打印棋盘
	Displayboard(board, ROW, COL);
	//玩家下棋
	char ret;
		while (1)
	{
		Playermove(board, ROW, COL);
		Displayboard(board, ROW, COL);
		ret = iswin(board, ROW, COL);
		if (ret != 'C')
		{
			break;
		}
		Computermove(board, ROW, COL);
		Sleep(1000);
		Displayboard(board, ROW, COL);
		ret = iswin(board, ROW, COL);
		if (ret != 'C')
		{
			break;
		}
		Sleep(1000);
	}
		if (ret != 'C')
		{
			break;
		}
	}
	if (ret == '*')
	{
		printf("恭喜玩家获胜!\n");
	}
	if (ret == '#')
	{
		printf("恭喜电脑获胜\n");
	}
	if (ret == 'Q')
	{
		printf("旗鼓相当的对手\n");
	}
}

void InitBoard(char arr[ROW][COL], int row, int col)
{
	for (int i = 0; i < row; i++)
	{
		for (int j = 0; j < col; j++)
		{
			arr[i][j] = ' ';
		}
	}
}

void Displayboard(char arr[ROW][COL], int row, int col)
{
	for (int i = 0; i < row; i++)
	{
		//打印数据行
		for (int j = 0; j < col; j++)
		{
			printf(" %c ", arr[i][j]);
			if (j < col - 1)
			{
				printf("|");
			}
		}
		printf("\n");
		//打印分割行
		if (i < row - 1)
		{
			for (int j = 0; j < col; j++)
			{
				printf("---");
				if (j < col - 1)
				{
					printf("|");
				}
			}
		}
		printf("\n");
	}
}

void Playermove(char board[ROW][COL], int row, int col)
{
	printf("玩家走->");
	int x;
	int y;
	while (1)
	{
		printf("请输入坐标->");
		scanf("%d %d", &x, &y);
		if (x <= ROW && x >= 1 && y <= COL && y >= 1)
		{
			if (board[x - 1][y - 1] == ' ')
			{
				board[x - 1][y - 1] = '*';
				break;
			}
			else
			{
				printf("坐标被占用，请重新输入\n");
			}
		}
		else
		{
			printf("坐标非法，请重新输入\n");
		}
	}
}

void Computermove(char board[ROW][COL], int row, int col)
{
	int x = 0;
	int y = 0;
	while (1)
	{
		x = rand() % row;
		y = rand() % col;
		if (board[x][y] == ' ')
		{
			printf("电脑走->\n");
			board[x][y] = '#';
			break;
		}
	}
}


char iswin(char board[ROW][COL], int row, int col)
{
	//判断输赢
	//行
	
	for (int i = 0; i < row; i++)
	{
		int countrow = 0;
		for (int j = 0; j < col-1; j++)
		{
			if (board[i][j] == board[i][j + 1] && board[i][j]!=' ')
			{
				countrow++;
			}
		}
		if (countrow == col - 1)
		{
			if (board[i][0] == '*')
			{
				return '*';
			}
			if (board[i][0] == '#')
			{
				return '#';
			}
		}
	}
	//列
	
	for (int j = 0; j < col; j++)
	{
		int countcol = 0;
		for (int i = 0; i < row - 1; i++)
		{
			if (board[i][j] == board[i + 1][j] && board[i][j]!=' ')
			{
				countcol++;
			}
		}
		if (countcol == row - 1)
		{
			if (board[0][j] == '*')
			{
				return '*';
			}
			if (board[0][j] == '#')
			{
				return '#';
			}
		}
	}
	//主对角线
	int count1 = 0;
	for (int i = 0; i < row-1; i++)
	{
		if (board[i][i] == board[i + 1][i+1] && board[i][i]!=' ')
		{
			count1++;
		}
	}
	if (count1 == col - 1)
	{
		if (board[0][0] == '*')
		{
			return '*';
		}
		if (board[0][0] == '#')
		{
			return '#';
		}
	}
	//斜对角线
	int count2 = 0;
	for (int i = 0; i < row - 1; i++)
	{
		if (board[i][row - 1 - i] == board[i + 1][row - i - 2] && board[i][row-1-i]!=' ')
		{
			count2++;
		}
	}
	if (count2 == col - 1)
	{
		if (board[0][col-1] == '*')
		{
			return '*';
		}
		if (board[0][col-1] == '#')
		{
			return '#';
		}
	}
	for (int i = 0; i < row; i++)
	{
		for (int j = 0; j < col; j++)
		{
			if (board[i][j] == ' ')
			{
				return 'C';
			}
		}
	}
	return 'Q';
}


//sanziqi.c

#include "game.h"
void menu()
{
	printf("*********************************\n");
	printf("*********************************\n");
	printf("*************1. play*************\n");
	printf("*************0. exit*************\n");
	printf("*********************************\n");
	printf("*********************************\n");
}
int main()
{
	srand((unsigned int)time(NULL));
	int input = 0;
	do
	{
		menu();
		printf("请选择\n");
		scanf("%d", &input);
		switch (input)
		{
		case 0:
			printf("游戏结束\n");
			break;
		case 1:
			system("cls");
			game();
			break;
		default:
			printf("选择错误，请重新输入\n");
			break;
		}
	} while (input!=0);

}