C语言——实现三子棋游戏

        更大程度地感受到每一个bug调试成功之后的喜悦。众所周知，写代码并不难，往往难点就在于找bug。当然，在遇到bug时我们也不慌不怕。在完成代码量较多的程序时，我们必须掌握一定的调试技巧，比如监视、逐过程、逐语句、断点（了解调试技巧 请点击这里）。

         那么，完成三子棋游戏的重难点仍旧在于二维数组，其次便是函数的调用及其定义。在整个项目中，首先应该建立整体框架，其次再去实现所需要的功能。

          此项目在后续会完成部分功能的优化，了解更多请关注博主dawn_xumujie。

//game.h
#ifndef __GAME_H__
#define __GAME_H__

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

#define ROW 3
#define COL 3

void game();
void InitBoard(char board[ROW][COL], int row, int col);
void DisplayBoard(char board[ROW][COL], int row, int col);
void PlayerMove(char board[ROW][COL], int row, int col);
void ComputerMove(char board[ROW][COL], int row, int col);
int IsFull(char board[ROW][COL], int row, int col);
char IsWin(char aboard[ROW][COL], int row, int col);

#endif

//test.c
#define _CRT_SECURE_NO_WARNINGS 
#include <stdio.h>
#include "game.h"

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

int main()
{
	int input = 0;
	do
	{
		srand((unsigned int)time(NULL));//确保每次生成随机数
		mune();
		printf("请选择：");
		scanf("%d", &input);
		switch(input)
		{
			case 1:
				game();
				break;
			case 0:
				printf("退出游戏!");
				break;
			default:
				printf("选择错误，请重新输入\n");
		}

	} 
	while (input);
	return 0;
}

//game.c
#define _CRT_SECURE_NO_WARNINGS 
#include <stdio.h>
#include "game.h"

//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<row; j++)
		{
			printf("  |");
		}
		printf("\n");
		for (j=0; j<=col; j++)
		{
			if (i == row)
			{
				break;
			}
			else if (j < col)
			{
				printf("--%c", board[i][j]);
			}
			else if (j == col)
			{
				printf("--");
			}
		}
		printf("\n");
	}
}

//初始化棋盘
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] = ' ';
		}
	}
}

//玩家走
void PlayerMove(char board[ROW][COL], int row, int col)
{
	int x = 0;
	int y = 0;
	while (1)
	{
		printf("请输入坐标:");
		scanf("%d%d", &x, &y);
		if (x>0 && x<=row && y>0 && y<=col)
		{
			if (' ' == board[x-1][y-1])
			{
				board[x-1][y-1] = '0';
				break;
			}
			else
				printf("坐标已被占用，请重新输入\n");
		}
		else
			printf("输入不合法，请重新输入\n");
	}
}

//电脑走
void ComputerMove(char board[ROW][COL], int row, int col)
{
	while (1)
	{
		int x = rand() % 3;
		int y = rand() % 3;
		if (' ' == board[x][y])
		{
			board[x][y] = 'X';
			break;
		}
	}
}

//判断期盼是否已满
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;
}

//判断输赢
char IsWin(char board[ROW][COL], int row, int col)
{
	int i = 0;
	if (i=IsFull(board, row, col) == 1)
	{
		return 'd';
	}

	for (i=0; i<row; i++)
	{
		if ((board[i][0]==board[i][1]) && (board[i][1]==board[i][2]))
		{
			return board[i][0];
		}
	}

	for (i=0; i<col; i++)
	{
		if ((board[0][i]==board[1][i]) && (board[1][i]==board[2][i]))
		{
			return board[1][i];
		}
	}

	if ((board[0][0]==board[1][1]) && (board[1][1]==board[2][2]))
	{
		return board[0][0];
	}

	if ((board[0][2]==board[1][1]) && (board[1][1]==board[2][0]))
	{
		return board[0][2];
	}
	return ' ';
}

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

	InitBoard(board, ROW, COL);
	DisplayBoard(board, ROW, COL);

	do
	{
		printf("电脑走：\n");
		ComputerMove(board, ROW, COL);
		DisplayBoard(board, ROW, COL);
		
		if (IsWin(board, ROW, COL) != ' ')
		{
			break;
		}

		printf("玩家走：\n");
		PlayerMove(board, ROW, COL);
		DisplayBoard(board, ROW, COL);
		
		ret = IsWin(board, ROW, COL);

	} while (ret == ' ');
	if (IsWin(board, ROW, COL) == 'd')
	{
		printf("平局！\n");
	}
	else if (IsWin(board, ROW, COL) == '0')
	{
		printf("恭喜玩家赢！\n");
	}
	else if (IsWin(board, ROW, COL) == 'X')
	{
		printf("恭喜电脑赢！\n");
	}

}

运行结果如图：