PWSS [UDP] Broadcast 50,100,150

// lab4.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <conio.h>
#include <WinSock2.h>

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


int _tmain(int argc, _TCHAR* argv[])
{
	WSADATA ws;
	SOCKET sock;
	int retcode=0;
	if(WSAStartup(MAKEWORD(2, 2), &ws)==NO_ERROR)
	{
		unsigned int res;
		sock=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
		if(sock==INVALID_SOCKET)
		{
			printf("Failed to open socket\n");
			retcode=2;
		}else{

			sockaddr_in address;
			address.sin_family=AF_INET;
			address.sin_addr.s_addr=INADDR_ANY;
			address.sin_port=htons(2000);
			if(bind(sock,(SOCKADDR*) &address,sizeof(address))==SOCKET_ERROR)
			{
				printf("bind failed with error id %d\n",WSAGetLastError());
				retcode=3;
			}else{
				address.sin_port=htons(3000);
				address.sin_addr.s_addr=inet_addr("192.168.0.67");
				const char sendarray[4]={50,100,150};
				do
				{
					printf("Init sequence sent\n");
					res=sendto(sock,sendarray,3,0,(SOCKADDR*)&address,sizeof(address));
					if(res==SOCKET_ERROR)
					{
						printf("sendto failed with error id %d\n",WSAGetLastError());
					}else{
						sockaddr_in Sender;
						int addrsize=sizeof(Sender);
						unsigned short bufor[100];
						res=recvfrom(sock,(char*) bufor , sizeof(bufor),0,(SOCKADDR*) &Sender,&addrsize);
						if(res==SOCKET_ERROR)
						{
							printf("recvfrom failed with error id %d\n",WSAGetLastError());
						}else{
							unsigned short suma=0;
							for(unsigned int i=0;i<res;i++)
							{
								printf("Received number %d = %d\n",i+1,bufor[i]);
								suma+=bufor[i];
							}
							printf("Calculated number %d\n",suma);
							res=sendto(sock,(char*) &suma,sizeof(unsigned short),0,(SOCKADDR*) &address,sizeof(address));
							if(res==SOCKET_ERROR)
							{
								printf("sendto(1) failed with error id %d\n",WSAGetLastError());

							}else{
								printf("Number successfully sent\n");
							}
						}
					}
					printf("Press any key to send, ESC to exit\n");
				}while(_getch()!=27);
			}
			res=closesocket(sock);
			if(res==SOCKET_ERROR)
			{
				printf("closesocket failed with error id %d",WSAGetLastError());
				retcode=5;
			}
		}
		res=WSACleanup();
		if(res==SOCKET_ERROR)
		{
			printf("WSACleanup failed with error id %d",WSAGetLastError());
			retcode=6;
		}
	}else{
		printf("Failed to initialize Winsock\n");
		retcode=1;
	}
	_getch();
	return retcode;
}