winsock: No such file or directory

#include <winsock>
#include <stdio.h>
#include <string>
#include <iostream>
//------------------------------------------------------------------------------
int main(int argc, char* argv[])
{
    WSADATA wsa_data;
    if (WSAStartup(0x101, &wsa_data) || wsa_data.wVersion != 0x101) return -1;
 
    SOCKET s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (s == INVALID_SOCKET) return -1;
 
    SOCKADDR_IN sa;
    sa.sin_family = AF_INET;
    sa.sin_port = htons(2000);
    sa.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
 
    std::string message;
    printf("message=");
    getline(std::cin, message);
    if
    (
        sendto
        (
            s,
            message.c_str(), message.length() + 1,
            0,
            (SOCKADDR *)&sa, sizeof(sa)
        ) == SOCKET_ERROR
    )
        return -1;
 
    closesocket(s);
 
    WSACleanup();
 
    system("pause");
    return 0;
}

//------------------------------------------------------------------------------
#include <winsock>
#include <stdio.h>
//------------------------------------------------------------------------------
int main(int argc, char* argv[])
{
    WSADATA wsa_data;
    if (WSAStartup(0x101, &wsa_data) || wsa_data.wVersion != 0x101) return -1;
 
    SOCKET s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (s == INVALID_SOCKET) return -1;
 
    SOCKADDR_IN sa;
    sa.sin_family = AF_INET;
    sa.sin_port = htons(2000);
    sa.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
 
    if (bind(s, (SOCKADDR *)&sa, sizeof(sa)) == SOCKET_ERROR) return -1;
 
    SOCKADDR_IN nsa;
    int sizeof_nsa = sizeof(nsa);
 
    char buffer[1024];
    int buffer_size = sizeof(buffer);
    if
    (
        recvfrom(s, buffer, buffer_size, 0, (SOCKADDR *)&nsa, &sizeof_nsa) ==
            SOCKET_ERROR
    )
        return -1;
    printf("message=%s\n", buffer);
 
    closesocket(s);
 
    WSACleanup();
 
    system("pause");
    return 0;
}

#include <WinSock2.h>