Клиент-сервер по протоколу UDP/IP

#include "stdafx.h"
#pragma comment(lib, "ws2_32.lib")
#include <winsock2.h>
#include <iostream>
 
#pragma warning(disable: 4996)
 
int main(int argc, char* argv[]) {
    //WSAStartup
    WSAData wsaData;
    WORD DLLVersion = MAKEWORD(2, 1);
    if(WSAStartup(DLLVersion, &wsaData) != 0) {
        std::cout << "Error" << std::endl;
        exit(1);
    }
 
    SOCKADDR_IN addr;
    int sizeofaddr = sizeof(addr);
    addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    addr.sin_port = htons(1111);
    addr.sin_family = AF_INET;
 
    SOCKET sListen = socket(AF_INET, SOCK_STREAM, NULL);
    bind(sListen, (SOCKADDR*)&addr, sizeof(addr));
    listen(sListen, SOMAXCONN);
 
    SOCKET newConnection;
    newConnection = accept(sListen, (SOCKADDR*)&addr, &sizeofaddr);
 
    if(newConnection == 0) {
        std::cout << "Error #2\n";
    } else {
        std::cout << "Client Connected!\n";
        char msg[256] = "Hello. It`s my first network program!";
        send(newConnection, msg, sizeof(msg), NULL);
    }
 
 
    system("pause");
    return 0;

#include "stdafx.h"
#pragma comment(lib, "ws2_32.lib")
#include <winsock2.h>
#include <iostream>
 
#pragma warning(disable: 4996)
 
int main(int argc, char* argv[]) {
    //WSAStartup
    WSAData wsaData;
    WORD DLLVersion = MAKEWORD(2, 1);
    if(WSAStartup(DLLVersion, &wsaData) != 0) {
        std::cout << "Error" << std::endl;
        exit(1);
    }
 
    SOCKADDR_IN addr;
    int sizeofaddr = sizeof(addr);
    addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    addr.sin_port = htons(1111);
    addr.sin_family = AF_INET;
 
    SOCKET Connection = socket(AF_INET, SOCK_STREAM, NULL);
    if(connect(Connection, (SOCKADDR*)&addr, sizeof(addr)) != 0) {
        std::cout << "Error: failed connect to server.\n";
        return 1;
    }
    std::cout << "Connected!\n";
    char msg[256];
    recv(Connection, msg, sizeof(msg), NULL);
    std::cout << msg << std::endl;
 
    system("pause");
    return 0;
}