C语言实现三子棋

通过二维数组与循环这两个简单的知识来实现三子棋

一共有两个源文件和一个头文件，将三个文件放在一个工程里

test.c

#define _CRT_SECURE_NO_WARNINGS 1
#include "game.h"

//菜单
void Menu()
{
	printf("********************************\n");
	printf("*********     0.Exit     *******\n");
	printf("*********     1.Play     *******\n");
	printf("********************************\n");
}

void game()
{
	char board[ROW][COL] = { 0 };
	//初始化棋盘
	InitBoard(board, ROW, COL);
	//打印棋盘
	DisplayBoard(board, ROW, COL);
	//下棋, 重复下棋再判断输赢的操作，直到得到结果(玩家赢/电脑赢/平局)，退出循环
	char ret = 0;
	while (1)
	{
		//玩家下棋
		PlayerMove(board, ROW, COL);
		//判断玩家输赢
		ret = Iswin(board, ROW, COL);
		//如果返回的不是C(继续),就退出循环
		if (ret != 'C')
			break;
		//打印棋盘(给玩家看到自己下到哪个位置)
		DisplayBoard(board, ROW, COL);
		
		//电脑下棋
		ComputerMove(board, ROW, COL);
		//判断电脑输赢
		ret = Iswin(board, ROW, COL);
		//如果返回的不是C(继续),就退出循环
		if (ret != 'C')
			break;
		//打印棋盘(给玩家看到电脑下到哪个位置)
		DisplayBoard(board, ROW, COL);
	}
	//判断最终结果
	if (ret == '*')
		printf("玩家赢\n");
	else if (ret == '#')
		printf("电脑赢\n");
	else
		printf("平局\n");
	DisplayBoard(board, ROW, COL);
}

int main()
{
	//在程序的入口设置一次随机数的生成起点
	srand((unsigned int)time(NULL));

	int input = 0;
	do//先进入一次循环
	{
		Menu();
		printf("请选择:>");
		scanf("%d", &input);
		//判断输入
		switch (input)
		{
		case 1:
			game();
			break;
		case 0:
			printf("退出游戏\n");
			break;
		default:
			printf("输入错误，请重新输入\n");
		}
	} while (input);//输入0不再次进入循环，输入非零的数进入
	return 0;
}

game.c

#define _CRT_SECURE_NO_WARNINGS 1
#include "game.h"
//初始化
void InitBoard(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++)
		{
			board[i][j] = ' ';
		}
	}
}
//打印棋盘
void DisplayBoard(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++)
		{
			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");
		}
	}
}

//玩家下棋
void PlayerMove(char board[ROW][COL], int row, int col)
{
	int x = 0;
	int y = 0;
	printf("玩家下棋\n");

	//下棋并判断坐标合法性
	while (1)
	{
		printf("请输入坐标位置:>");
		scanf("%d%d", &x, &y);
		if (x >= 1 && x <= ROW && y >= 1 && y <= COL)
		{
			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");
		}
	}
}

//电脑下棋
void ComputerMove(char board[ROW][COL], int row, int col)
{
	printf("电脑下棋\n");
	int x = 0;
	int y = 0;
	while (1)
	{
		x = rand() % 3;
		y = rand() % 3;//将生成的随机数模上3，可以将随机数生成范围缩减至0~2
		if (board[x][y] == ' ')
		{
			board[x][y] = '#';
			break;
		}
	}
}
//判断棋盘状态，没满就返回C，满了就返回Q
char 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 'C';
		}
	}
	return 'Q';
}

//判断输赢
char Iswin(char board[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;

	//判断每一行是否能得出结果
	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];
		}
	}

	//判断每一列是否能得出结果
	for (j = 0; j < col; j++)
	{
		if (board[0][j] == board[1][j] && board[1][j] == board[2][j] && board[0][j] != ' ')
		{
			return board[0][j];
		}
	}
	//判断两条对角线是否能得出结果
	if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[0][0] != ' ')
	{
		return board[0][0];
	}
	else if (board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[0][2] != ' ')
	{
		return board[0][2];
	}

	//判断棋盘是否满了(会返回C或者Q)
	return Isfull(board, row, col);

	//
	//返回值：
	//*      玩家赢
	//#      电脑赢
	//Q      平局
	//C      继续
	//
}

game.h

#pragma once
#define ROW 3
#define COL 3
//头文件
#include <stdio.h>
#include<time.h>
#include<stdlib.h>

//初始化棋盘
void InitBoard(char board[ROW][COL], int row, int col);
//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，寻找没有下过的坐标随机生成
void ComputerMove(char board[ROW][COL], int row, int col);
//判断输赢
char Iswin(char board[ROW][COL], int row, int col);
//判断棋盘状态(有没有下满)
char Isfull(char board[ROW][COL], int row, int col);