C++实现编写程序以SOCKET流式套接字的通信方式，实现客户端和服务器之前的聊天程序完整代码

在C++中，我们可以使用socket编程库来创建一个简单的TCP网络聊天应用程序，这里提供了一个基本的客户端-服务器模型的框架代码示例。注意，为了简洁，这个例子仅包含了关键部分，并未包含完整的异常处理和其他细节。

首先，我们来看服务器端：

#include <iostream>
#include <string>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>

// Server function
void server(int port) {
    int server_socket = socket(AF_INET, SOCK_STREAM, 0);
    sockaddr_in server_addr;
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(port);
    server_addr.sin_addr.s_addr = INADDR_ANY;

    bind(server_socket, (sockaddr*)&server_addr, sizeof(server_addr));
    listen(server_socket, 5);

    while (true) {
        sockaddr_in client_addr;
        socklen_t addr_len = sizeof(client_addr);
        int client_socket = accept(server_socket, (sockaddr*)&client_addr, &addr_len);

        char buffer[1024] = "";
        std::cout << "Accepted connection from: " << inet_ntoa(client_addr.sin_addr) << ":" << ntohs(client_addr.sin_port) << "\n";

        // Read and write loop
        while (true) {
            ssize_t bytes_received = recv(client_socket, buffer, sizeof(buffer), 0);
            if (bytes_received <= 0) break; // Break if no more data

            std::cout << "Received: " << buffer << "\n";
            send(client_socket, buffer, bytes_received, 0); // Echo back to client
        }

        close(client_socket);
        std::cout << "Client disconnected.\n";
    }
}

int main() {
    int port = 12345; // Choose your desired port
    try {
        server(port);
    } catch (std::exception& e) {
        std::cerr << "Error: " << e.what() << '\n';
    }
    return 0;
}

然后是客户端：

#include <iostream>
#include <string>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

// Client function
void client(const std::string& hostname, int port) {
    int client_socket = socket(AF_INET, SOCK_STREAM, 0);
    sockaddr_in server_addr;
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(port);
    inet_pton(AF_INET, hostname.c_str(), &server_addr.sin_addr);

    connect(client_socket, (sockaddr*)&server_addr, sizeof(server_addr));

    std::string message;
    std::getline(std::cin, message);
    std::cout << "Sending: " << message << "\n";

    send(client_socket, message.c_str(), message.size(), 0);
    std::string response;
    while (!response.empty()) {
        char buffer[1024];
        ssize_t bytes_received = recv(client_socket, buffer, sizeof(buffer), 0);
        if (bytes_received > 0) response.append(buffer, bytes_received);
    }

    std::cout << "Received: " << response << "\n";
    close(client_socket);
}

int main() {
    std::string hostname = "localhost"; // Replace with the server IP or hostname
    int port = 12345; // Match the server's port
    try {
        client(hostname, port);
    } catch (std::exception& e) {
        std::cerr << "Error: " << e.what() << '\n';
    }
    return 0;
}