#include <cstdlib>
#include <iostream>
#include <fstream>
#include <windows.h>
#include <winable.h>
#include <stdio.h> 
#include <conio.h> 
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <winsock.h>
#include <windows.h>
#include <stdio.h> 
#include <stdlib.h> 
#include <windows.h> 
using namespace std;
void copy (istream& is, ostream& os);
int start_winsock(); 
struct sockaddr_in me;
int main()
{

  char buf[1000];
long p;
long rc; 

SOCKET a;//accept Socket 
SOCKET c;//conncet Socket 
SOCKADDR_IN addr; 

rc=start_winsock(); 
if (rc==0) 
printf("Winsocket gestratet\n"); 
a= socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (a == INVALID_SOCKET)
{
WSACleanup();
printf("Error failed\n");
return(0);
}
else
printf("No error");
memset(&me, 0, sizeof(me));

// internet address family
me.sin_family = AF_INET;

// Port (change if you want)
me.sin_port = htons(10001);

me.sin_addr.s_addr=htonl(INADDR_ANY); 

p=bind(a, (struct sockaddr *) &me, sizeof(me));

if (p== SOCKET_ERROR)
{
printf("Error failed\n");

}
else
printf("No Fehler");

rc=listen(a,10); 
if(rc!=SOCKET_ERROR) 
printf("Kein Fehler ist listen"); 
c=accept(a,NULL,NULL);
if(c!=INVALID_SOCKET)
printf ("Verbunden\n");
ofstream o ("peter.txt");

rc=recv(c,buf,256,0);
printf(buf);

o.put(buf);
 o.close();
return 0;
}
int start_winsock() 
{ 
 WSADATA wsa; 
return(WSAStartup(MAKEWORD(2,0), &wsa));   
    }

Nun die Fehlermeldung:
76 C:\Dokumente und Einstellungen\?Desktop\main.cpp invalid conversion from `char*' to `char'
76 C:\Dokumente und Einstellungen\Frederik\Desktop\main.cpp initializing argument 1 of `std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::put(_CharT) [with _CharT = char, _Traits = std::char_traits<char>]'

C:\Dev-Cpp\Makefile.win [Build Error] ["../Dokumente und Einstellungen/Frederik/Desktop/main.o"] Error 1

http://www.cplusplus.com/reference/iostream/ostream/put/

if(c!=INVALID_SOCKET)
printf ("Verbunden\n");
ofstream outfile ("new.txt",ofstream::binary);
rc=recv(c,buf,256,0);
printf(buf);

 outfile.write (buf);
 outfile.close();
return 0;
}

ERROR: 75 C:\Dokumente und Einstellungen\Frederik\Desktop\main.cpp no matching function for call to `std::basic_ofstream<char, std::char_traits<char> >::write(char[1000])'
note C:\Dev-Cpp\include\c++\3.4.2\bits\ostream.tcc:360 candidates are: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::write(const _CharT*, std::streamsize) [with _CharT = char, _Traits = std::char_traits<char>]

hat einer ne Idee

3. Bei outfile.write(..) wird noch die länge des zu schreibenden buffers erwartet.

Bsp:

if(c!=INVALID_SOCKET)
{
   printf ("Verbunden\n");
   rc=recv(c,buf,256,0);
   if (0 == rc)
   {
       printf ("Getrennt\n");
   }
   else if (0 > rc)
   {
       printf ("Fehler\n");
   }
   else
   {
      buf[rc] = '\0';
      printf(buf);

      ofstream outfile("new.txt",ofstream::binary);
      outfile.write (buf, rc);
      outfile.close();
   }
}