Client

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

int main(){
    WSADATA = wsaData;
    int result = WSAStartup(MAKEWORD(2, 2), &wsaData);
    if(NO_ERROR != result){
        std::cout<<"ERR: Initialization error. \n";
    }

    SOCKET mainSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(INVALID_SOCKET == mainSocket){
        std::cout<<"ERR: Creating socket failed. \n";
        WSACleanup();
        return 1;
    }

    sockaddr_in service;
    memset(&service, 0, sizeof(service));
    service.sin_family = AF_INET;
    service.sin_addr.s_addr = inet_addr("127.0.0.1");
    service.sin_port = htons(27015);

    if(SOCKET_ERROR == connect(mainSocket, (SOCKADDR*)&service, sizeof(service))){
        std::cout<<"ERR: Failed to connect. \n";
        WSACleanup();
        return 1;
    }
}