C++实现Socket 实现五子棋小游戏

下面是一个简单的 C++ 实现的 Socket 五子棋小游戏：

服务端代码：

#include <iostream>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define PORT 1234
#define BACKLOG 5
#define MAXDATASIZE 100

using namespace std;

int main()
{
    int sockfd, client_fd;
    struct sockaddr_in my_addr;
    struct sockaddr_in remote_addr;
    char buf[MAXDATASIZE];
    int sin_size;

    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
        cout << "Create socket error!" << endl;
        exit(1);
    }

    my_addr.sin_family = AF_INET;
    my_addr.sin_port = htons(PORT);
    my_addr.sin_addr.s_addr = INADDR_ANY;
    bzero(&(my_addr.sin_zero), 8);

    if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1)
    {
        cout << "Bind error!" << endl;
        exit(1);
    }

    if (listen(sockfd, BACKLOG) == -1)
    {
        cout << "Listen error!" << endl;
        exit(1);
    }

    cout << "Server started!" << endl;

    sin_size = sizeof(struct sockaddr_in);
    if ((client_fd = accept(sockfd, (struct sockaddr *)&remote_addr, (socklen_t *)&sin_size)) == -1)
    {
        cout << "Accept error!" << endl;
        exit(1);
    }

    cout << "Client connected!" << endl;

    send(client_fd, "Welcome to the game!", MAXDATASIZE, 0);

    while (1)
    {
        if ((recv(client_fd, buf, MAXDATASIZE, 0)) == -1)
        {
            cout << "Receive error!" << endl;
            exit(1);
        }

        cout << "Received: " << buf << endl;

        if (strcmp(buf, "exit") == 0)
        {
            break;
        }

        send(client_fd, "OK", MAXDATASIZE, 0);
    }

    close(client_fd);
    close(sockfd);

    cout << "Server stopped!" << endl;

    return 0;
}

客户端代码：

#include <iostream>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define PORT 1234
#define MAXDATASIZE 100

using namespace std;

int main()
{
    int sockfd;
    char buf[MAXDATASIZE];
    struct sockaddr_in server_addr;

    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {
        cout << "Create socket error!" << endl;
        exit(1);
    }

    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    bzero(&(server_addr.sin_zero), 8);

    if (connect(sockfd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
    {
        cout << "Connect error!" << endl;
        exit(1);
    }

    cout << "Connected to the server!" << endl;

    if ((recv(sockfd, buf, MAXDATASIZE, 0)) == -1)
    {
        cout << "Receive error!" << endl;
        exit(1);
    }

    cout << "Received: " << buf << endl;

    while (1)
    {
        cout << "Please enter your move: " << endl;
        cin >> buf;

        if ((send(sockfd, buf, strlen(buf), 0)) == -1)
        {
            cout << "Send error!" << endl;
            exit(1);
        }

        if (strcmp(buf, "exit") == 0)
        {
            break;
        }

        if ((recv(sockfd, buf, MAXDATASIZE, 0)) == -1)
        {
            cout << "Receive error!" << endl;
            exit(1);
        }

        cout << "Received: " << buf << endl;
    }

    close(sockfd);

    cout << "Disconnected from the server!" << endl;

    return 0;
}

这个代码实现了一个简单的基于 Socket 的五子棋小游戏，可以在本地运行。服务端代码监听一个端口并等待客户端连接，一旦连接成功，就发送欢迎消息并开始循环接收来自客户端的消息，如果接收到 "exit" 消息就退出循环并关闭连接。客户端代码连接到服务端并接收欢迎消息，然后开始循环输入并发送消息给服务端，如果输入 "exit" 消息就退出循环并关闭连接。