using select from berkeley socket API to make a client/server with timeout

server.cpp

/*This is for a stackoverflow answear: 
http://pt.stackoverflow.com/questions/144150/como-implementar-timeout-no-recv-em-socket-h/164440#164440
the code was compiled with mingw g++ using codeblocks, in order to compile this code you must link it to the ws2_32.lib on windows
*/
#include <iostream>
#include <string>
#include <algorithm>
#include <winsock2.h>

int main(){
    UINT fd, client;
    struct sockaddr_in sock_addr, client_addr;
    int client_addr_size = sizeof(struct sockaddr_in);

    struct fd_set m_fdset;
    struct timeval timeout = {10, 0};

    WSADATA wsaData;
    if(WSAStartup(MAKEWORD(2, 2), &wsaData) < 0){
        std::cout << "wsastartup error!!" << std::endl;
        return 0;
    }

    if((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
        std::cout << "socket error!!" << std::endl;
        return 0;
    }

    sock_addr.sin_family = AF_INET;
    sock_addr.sin_addr.s_addr = INADDR_ANY;
    sock_addr.sin_port = htons(80);
    memset(&(sock_addr.sin_zero), 0x00, sizeof(sock_addr.sin_zero));

    if(bind(fd, (struct sockaddr*)&sock_addr, sizeof(sockaddr_in)) < 0){
        std::cout << "binding error!\n";
        return -1;
    }
    if(listen(fd, 1) < 0){
        std::cout << "listen error!\n";
        return -1;
    }

    FD_ZERO(&m_fdset);
    FD_SET(fd, &m_fdset);
    if(select(fd + 1, &m_fdset, NULL, NULL, &timeout) < 0){
        std::cout << "select error!\n";
        return -1;
    }

    if(FD_ISSET(fd, &m_fdset)){
        if((client = accept(fd, (struct sockaddr*)&client_addr, &client_addr_size)) == INVALID_SOCKET){
            std::cout << "accept error!\n";
            return -1;
        }else{
            std::string sendme;
            std::string str_addr(inet_ntoa(sock_addr.sin_addr));

            std::cout << "new connection from: " << str_addr << std::endl;
            std::cout << "write a message to send:\n";
            std::cin >> sendme;
            if(send(client, sendme.c_str(), std::min<unsigned int>(sendme.length(), 4096), 0) <= 0){
                std::cout << "send error or connection finished!\n";
                system("pause");
                return -1;
            }
        }
    }else{
        std::cout << "No connections!\n";
    }

    system("pause");

    return 0;
}