server.cpp

#include <iostream>
#include <string>
#include <winsock2.h>
#include <ws2tcpip.h>

#pragma comment(lib, "Ws2_32.lib")

#define PORT 8080

int main() {
    WSADATA wsaData;
    int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
    if (iResult != 0) {
        std::cerr << "WSAStartup failed: " << iResult << std::endl;
        return 1;
    }

    int server_fd, new_socket;
    struct sockaddr_in address;
    int addrlen = sizeof(address);
    char buffer[1024] = {0};

    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
        std::cerr << "Socket creation error" << std::endl;
        WSACleanup();
        return 1;
    }

    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);

    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) == SOCKET_ERROR) {
        std::cerr << "Bind failed" << std::endl;
        closesocket(server_fd);
        WSACleanup();
        return 1;
    }

    if (listen(server_fd, 3) == SOCKET_ERROR) {
        std::cerr << "Listen failed" << std::endl;
        closesocket(server_fd);
        WSACleanup();
        return 1;
    }

    std::cout << "Waiting for connections..." << std::endl;

    if ((new_socket = accept(server_fd, (struct sockaddr *)&address, &addrlen)) == INVALID_SOCKET) {
        std::cerr << "Accept failed" << std::endl;
        closesocket(server_fd);
        WSACleanup();
        return 1;
    }

    while (true) {
        memset(buffer, 0, sizeof(buffer));
        int valread = recv(new_socket, buffer, 1024, 0);
        if (valread > 0) {
            std::cout << "Client: " << buffer << std::endl;
            std::string message;
            std::cout << "Server: ";
            std::getline(std::cin, message);
            send(new_socket, message.c_str(), message.size(), 0);
        }
    }

    closesocket(new_socket);
    closesocket(server_fd);
    WSACleanup();
    return 0;
}