simple socket problem

#include <iostream>
#include <winsock.h>

using namespace std;
const unsigned short int port = 5432;
const int max_pending = 10;
const int max_len = 256;

int main() 
{
	WORD wVersionRequested;
	WSADATA wsaData;
	wVersionRequested = MAKEWORD( 1, 1 );
	WSAStartup( wVersionRequested, &wsaData );

	sockaddr_in address; //address
	sockaddr_in client_address; //client address
	char message[max_len];
	int s;
	int new_s;
	int len;
	//build address
	memset(&address, 0, sizeof(address));
	address.sin_family = AF_INET;
	address.sin_addr.s_addr = htonl(INADDR_ANY);
	address.sin_port = htons(port);
	//setup passive open
	if ((s=socket(PF_INET, SOCK_STREAM, 0)) < 0) {
		cout<<"error in socket";
		return 0;
	}
	//bind socket to address
	if (bind(s, (sockaddr *)&address, sizeof(address)) < 0) {
		cout<<"error in bind";
		return 0;
	}
	if (listen(s, max_pending) < 0) {
		cout<<"error in listen";
		return 0;
	}
	//wait for connection, then receive message
	socklen_t size;
	while (1) {
		if ((new_s = accept(s, (sockaddr *)&client_address, &size)) < 0) {
			cout<<"error in accept";
			return 0;
		}
		while (len = recv(new_s, message, sizeof(message), 0)) {
			cout<<message<<"\n";
		}
		close(new_s);
	}
}