NewbieContest

#include <stdio.h>
#include <winsock.h>
#include <string.h>

#ifndef SD_SEND
#define SD_SEND 1
#endif

bool init_winsock(void) {
   WSAData Data;
   int Code;

   if((Code=WSAStartup(MAKEWORD(1, 1),&Data)) != 0) {
      printf("erreur dans WSAStartup() : %d\n", Code);
      return false;
   }
   return true;
}

SOCKET etablir_connexion(u_long adresse_distante, u_short port) {
   sockaddr_in sinDistant;
   SOCKET sd = socket(AF_INET, SOCK_STREAM, 0);

   if(sd!=INVALID_SOCKET) {
       sinDistant.sin_family = AF_INET;
       sinDistant.sin_addr.s_addr = adresse_distante;
       sinDistant.sin_port = port;
       if(connect(sd,
         (sockaddr*)&sinDistant,
         sizeof(sockaddr_in))==SOCKET_ERROR)
             sd = INVALID_SOCKET;
  }
  return sd;
}

u_long resoudre_adresse(char* hote) {
   hostent* pHE;
   u_long adresse_distante = inet_addr(hote);

   if(adresse_distante == INADDR_NONE) {
      pHE = gethostbyname(hote);
      if(pHE == 0) return INADDR_NONE;
      adresse_distante = *((u_long*)pHE->h_addr_list[0]);
   }
   return adresse_distante;
}

int main(void) {
	char *Hote = "newbiecontest.free.fr";
	int Port = 80; 
    int req; 
    
	init_winsock();

	u_long adresse;
	SOCKET sd;
	char *requete;
	char tampon;

	// Trouver l'adresse de l'hôte
	printf("Recherche de l'hôte... [%s]\n", Hote);
	adresse = resoudre_adresse(Hote);
	if(adresse==INADDR_NONE) {
	   printf("Echec !\n");
	   return 3;
	}

	printf("Connexion en cours !\n");
	sd = etablir_connexion(adresse, htons(Port));
	if(sd!=INVALID_SOCKET) printf("Connecté !\n");

	// envoi de la requête
	requete="GET /ep15/index.php HTTP/1.1\r\nHost: newbiecontest.free.fr\r\nAccept: */*\r\n\r\n";
	req=send(sd, requete, strlen(requete)+1,0);

	// réception de la réponse
	while(recv(sd,&tampon,1,0)!=0) {
         printf("%c", tampon);
	}
	// quitter correctement winsock
	shutdown(sd, SD_SEND);
	closesocket(sd);
	WSACleanup();

    
    system("PAUSE");
}

Code Client (TCP - socket bloquante)

#include <stdio.h>    // printf
#include <conio.h>    // getch()
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")

void main()
{
	WSADATA WSAData;
	WSAStartup(MAKEWORD(2,0), &WSAData);

	SOCKET sock;
	SOCKADDR_IN sin;
	char buffer[255];

	sock = socket(AF_INET, SOCK_STREAM, 0);

	sin.sin_addr.s_addr = inet_addr("127.0.0.1");
	sin.sin_family	    = AF_INET;
	sin.sin_port	    = htons(4444);

	connect(sock, (SOCKADDR *)&sin, sizeof(sin));
   	memset(buffer,0,255);
	recv(sock, buffer, sizeof(buffer), 0);
   	printf("%s",buffer);
   	getch();
	closesocket(sock);
	WSACleanup();
}

Code Serveur (TCP - socket bloquante)

#include <stdio.h>    // printf
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")

void main()
{
	char buffer[255];

	WSADATA WSAData;
	WSAStartup(MAKEWORD(2,0), &WSAData);

	SOCKET sock;
	SOCKET csock;
	SOCKADDR_IN sin;
	SOCKADDR_IN csin;

	sock = socket(AF_INET, SOCK_STREAM, 0);

	sin.sin_addr.s_addr = INADDR_ANY;
	sin.sin_family	    = AF_INET;
	sin.sin_port	    = htons(4444);

	bind(sock, (SOCKADDR *)&sin, sizeof(sin));
	listen(sock, 0);

	while(1)
	{
	   int sinsize = sizeof(csin);
	   if((csock = accept(sock, (SOCKADDR *)&csin, &sinsize)) != INVALID_SOCKET)
	   {
      		 memset(buffer,0,255);
	         wsprintf(buffer,"Bienvenu sur mon serveur ;)");
	         send(csock,buffer,255,0);
	   }
	}
}

[phoenix@home tmp]$ gcc -o test test.c
test.c:3:2: warning: no newline at end of file
[phoenix@home tmp]$ echo -e '\n' >> test.c
[phoenix@home tmp]$ gcc -o test test.c
[phoenix@home tmp]$

Ce serait bien de voir ta 27eme ligne voire tout ton code

1>c:\documents and settings\********\mes documents\visual studio 2005\projects\o\o\o.cpp(4) : fatal error C1083: Impossible d'ouvrir le fichier include : 'winsock2.h' : No such file or directory

int main(int argc, char **argv)