一、rand随机函数的使用

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

//随机洗牌程序
int main()
{
    int i = 0;
    int arr[54] = { 0 };
    int mark[55] = { 0 };
    srand((unsigned int)time(NULL));
    while (i < 54) {
        int x = rand() % 54 + 1;
        if (mark[x] == 1) {
            continue;
        }
        arr[i] = x;
        mark[x] = 1;
        printf("%d\t", arr[i]);
        i++;
    }

    return 0;
}

三子棋游戏实现

test.c

//三子棋游戏
#include "game.h"
void game()
{
    int flag = 1;//标记输赢
    char board[ROW][COL] = { '0' };
    //初始化棋盘
    InitBoard(board);
    //展示棋盘
    DisplayBoard(board, ROW, COL);
    //下棋
    while (1) {
        //电脑下棋
        ComputerMove(board, ROW, COL);
        //棋盘展示
        DisplayBoard(board, ROW, COL);
        //判断电脑是否赢
        flag = isWin(board, ROW, COL);
        if (flag == 1) {
            printf("电脑赢！\n");
            break;
        }
        else if (flag == 0) {
            printf("平局！\n");
            break;
        }

        //玩家下棋
        PlayMove(board);
        //棋盘展示
        DisplayBoard(board, ROW, COL);
        //判断玩家是否赢
        flag = isWin(board, ROW, COL);
        if (flag == 1) {
            printf("玩家赢！\n");
            break;
        }
        else if (flag == 0) {
            printf("平局！\n");
            break;
        }
    }

}

//进入游戏
void Begin() 
{
    int input = 0;
    do {
        printf("*****************************\n");
        printf("****  1、play   0、exit  ****\n");
        printf("*****************************\n");
        printf("请输入您的选择：>");
        scanf("%d", &input);
        switch (input) {
        case 1:
            game();
            break;
        case 0:
            printf("游戏结束,欢迎下次再来!\n");
            break;
        default:
            printf("您的输入有误，请重新输入！");
            break;
        }
    } while (input);

}

int main()
{
    Begin();

    return 0;
}

game.h

#pragma once

#define ROW 4
#define COL 4
#include <stdio.h>
#include <time.h>
#include <stdlib.h>

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

game.c

#define _CRT_SECURE_NO_WARNINGS 1
#include "game.h"

//初始化棋盘函数
void InitBoard(char board[ROW][COL])
{
    for (int i = 0; i < ROW; i++) {
        for (int j = 0; j < COL; j++) {
            board[i][j] = ' ';
        }
    }
}

//显示棋盘信息函数
void DisplayBoard(char board[ROW][COL], int row, int col)
{
    for (int i = 0; i < row; i++) {
        //打印一行
        for (int j = 0; j < col; j++) {
            if (i == 0) {
                printf(" %d ", j);
                if (j < col - 1) {
                    printf("|");
                }
            }
            else if (j == 0) {
                printf(" %d ", i);
                if (j < col - 1) {
                    printf("|");
                }
            }
            else {
                printf(" %c ", board[i][j]);
                if (j < col - 1) {
                    printf("|");
                }
            }
        }
        printf("\n");

        if (i < row - 1) {
            for (int j = 0; j < col; j++) {
                printf("---");
                if (j < col - 1) {
                    printf("|");
                }
            }
            printf("\n");
        }
    }
}

//玩家下棋函数
void PlayMove(char board[ROW][COL])
{
    int x, y;
    printf("玩家下棋\n");
    printf("玩家请输入下棋坐标：");
    while (1) {
        scanf("%d%d", &x, &y);
        if (x >= 1 && x <= ROW-1 && y >= 1 && y <= COL-1) {
            if (board[x][y] == ' ') {
                board[x][y] = '*';
                break;
            }
            else {
                printf("您输入的位置已被占用，请重新输入: >");
            }
        }
        else {
            printf("您输入的坐标超过棋盘范围，请重新输入：>");
        }
    }
}

//电脑下棋函数
void ComputerMove(char board[ROW][COL], int row, int col)
{
    int x, y;
    printf("电脑下棋\n");
    srand((unsigned int)time(NULL));
    while (1) {
        x = rand() % (row - 1) + 1;
        y = rand() % (col - 1) + 1;

        if (board[x][y] == ' ') {
            board[x][y] = '#';
            break;
        }
    }
}

//判断是否平局
int isPing(char board[ROW][COL], int row, int col)
{
    for (int i = 1; i < row; i++) {
        for (int j = 1; j < col; j++) {
            if (board[i][j] == ' ') {
                return 2;
            }
        }
    }
    return 0;
}

//判断输赢
int isWin(char board[ROW][COL], int row, int col)
{
    for (int i = 1; i < row; i++) {
        //行
        if ((board[i][1] == board[i][2] && board[i][2] == board[i][3] && board[i][1] != ' ')) {
            return 1;
        }
        //列
        if ((board[1][i] == board[2][i] && board[2][i] == board[3][i]) && board[1][i] != ' ') {
            return 1;
        }
        //斜着
        if ((board[1][1] == board[2][2] && board[2][2] == board[3][3] && board[1][1] != ' ')||(board[1][3] == board[2][2] && board[2][2] == board[3][1]) && board[1][3] != ' ') {
            return 1;
        }       
    }

    return isPing(board, ROW, COL); 
}