C语言小游戏：三子棋

这个小游戏的程序由三部分代码组成，分别是头文件，游戏代码和测试代码。

头文件：game.h

#ifndef __GAME_H__
#define __GAME_H__

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

#define ROW 3
#define COL 3

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

#endif //__GAME_H__

测试代码：test.c

#define _CRT_SECURE_NO_WARNINGS 1

#include "game.h"

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

void game()
{
	int ret = 0;//返回值
	int num = 0;
	char board[ROW][COL] = {0};
	InitBoard(board, ROW, COL);
    printf("1.玩家先走  2.电脑先走\n");
	printf("请选择;>");
    scanf("%d",&num);
    switch(num)
	{
    case 1://选择玩家先走
		{
			while(1)
	{
		DisplayBoard(board, ROW, COL);
		PlayerMove(board,ROW,COL);
		ret = IsWin(board,ROW,COL);
		if(ret != ' ')//棋盘已经走满，进行判断
		{
			break;
		}
		DisplayBoard(board, ROW, COL);
		ComputerMove(board,ROW,COL);
		ret = IsWin(board,ROW,COL);
		if(ret != ' ')
		{
			break;
		}
		DisplayBoard(board, ROW, COL);
	}
		}
    case 2://选择电脑先走
		{
			while(1)
	{
		ComputerMove(board,ROW,COL);
		ret = IsWin(board,ROW,COL);
		if(ret != ' ')
		{
			break;
		}
		DisplayBoard(board, ROW, COL);
		PlayerMove(board,ROW,COL);
		ret = IsWin(board,ROW,COL);
		if(ret != ' ')
		{
			break;
		}
		DisplayBoard(board, ROW, COL);
	}
		}
		default:
	printf("选择错误！\n");
    }
	DisplayBoard(board, ROW, COL);
	//判断
	if(ret == 'X')
		printf("电脑赢！\n");
	else if(ret == 'O')
		printf("玩家赢！\n");
	else if(ret == 'P')
		printf("平局！\n");
}

void test()
{
	int input = 0;
	srand((unsigned int)time(NULL));
	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！\n");
		}
	}while(input);
}

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

游戏代码：game.c

#define _CRT_SECURE_NO_WARNINGS 1

#include "game.h"

void InitBoard(char board[ROW][COL], int row, int col)//初始化数组
{
	int i = 0;
	int j = 0;
    memset(board,' ',row*col*sizeof(board[0][0]));
}

void DisplayBoard(char board[ROW][COL], int row, int col)//打印棋盘
{
	int i = 0;
	for(i=0; i<row; i++)
	{
		int j = 0;
		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");
	}
}

void ComputerMove(char board[ROW][COL], int row, int col)//电脑走
{
	int x = 0;
	int y = 0;
	printf("电脑走\n");
	while(1)
	{
		x = rand()%row;//随意值
	    y = rand()%col;
	if(board[x][y]==' ')
	{
		board[x][y] = 'X';//电脑走的话输入X
		break;
	}
	}
}

void PlayerMove(char board[ROW][COL], int row, int col)//玩家走
{
	int x = 0;
	int y = 0;
	printf("玩家走\n");
	while(1)
	{
		printf("请输入坐标:>");
	scanf("%d %d",&x,&y);
	if((x>=1 && x<=3) && (y>=1 && y<=3))
	{
		if(board[x-1][y-1] == ' ')
		{
			board[x-1][y-1] = 'O';
			break;
		}
		else
		{
			printf("该坐标已被占用！\n");
		}
	}
	else
	{
		printf("坐标非法!\n");
	}
	}
}

char IsWin(char board[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;
	//判断电脑和玩家的输赢
	for(i=0; i<row; i++)
	{
		if((board[i][0]==board[i][1]) && (board[i][0]==board[i][2]) && board[i][0]!=' ')
			return board[i][0];
	}
	for(j=0; j<col; j++)
	{
		if((board[0][j]==board[1][j]) && (board[0][j]==board[2][j]) && board[0][j]!=' ')
			return board[0][j];
	}
	if((board[0][0]==board[1][1]) && (board[1][1]==board[2][2]) && board[1][1]!=' ')
		return board[0][0];
	if((board[0][2]==board[1][1]) && (board[1][1]==board[2][0]) && board[1][1]!=' ')
		return board[1][1];
	//判断平局
	if(IsFull(board, ROW, COL))
	{
		return 'P';
	}
	//游戏继续
	return ' ';
}

static int IsFull(char board[ROW][COL], int row, int col)//此函数只在game.c内部使用
{
	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;
}

结果展示：