C++에서 네트워크 프로그래밍 기능을 사용하는 방법은 무엇입니까?

int socket(int domain, int type, int protocol);

#include <iostream>
#include <sys/socket.h>

int main() {
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        std::cout << "Failed to create socket" << std::endl;
        return 1;
    }
    
    std::cout << "Socket created successfully" << std::endl;
    
    // 后续可以继续在该套接字上进行数据通信操作
    
    return 0;
}

int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>

int main() {
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        std::cout << "Failed to create socket" << std::endl;
        return 1;
    }
    
    struct sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(8080); // 使用端口号8080
    addr.sin_addr.s_addr = INADDR_ANY; // 使用本地的IP地址
    
    if (bind(sockfd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
        std::cout << "Failed to bind socket" << std::endl;
        return 2;
    }
    
    std::cout << "Socket bound successfully" << std::endl;
    
    // 后续可以继续在该套接字上进行数据通信操作
    
    return 0;
}

int listen(int sockfd, int backlog);

int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen);

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>

int main() {
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        std::cout << "Failed to create socket" << std::endl;
        return 1;
    }
    
    struct sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(8080); // 使用端口号8080
    addr.sin_addr.s_addr = INADDR_ANY; // 使用本地的IP地址
    
    if (bind(sockfd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
        std::cout << "Failed to bind socket" << std::endl;
        return 2;
    }
    
    if (listen(sockfd, 5) == -1) {
        std::cout << "Failed to listen on socket" << std::endl;
        return 3;
    }
    
    std::cout << "Waiting for incoming connections..." << std::endl;
    
    struct sockaddr_in client_addr;
    socklen_t client_addrlen = sizeof(client_addr);
    
    int client_sockfd = accept(sockfd, (struct sockaddr*)&client_addr, &client_addrlen);
    if (client_sockfd == -1) {
        std::cout << "Failed to accept client connection" << std::endl;
        return 4;
    }
    
    std::cout << "Client connected successfully" << std::endl;
    
    // 后续可以继续在该客户端套接字上进行数据通信操作
    
    return 0;
}