#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
 
int sockfd, newsock;
 
int main (int argc, char *argv [])
{
	printf ("Code 0.1 - Dealer 2011\n");
	if (argc != 2) { printf ("Use: %s <port>\n\n", argv [0]); return 1; }
 
	int cont = 0;
	struct sockaddr_in client, host;
	char buffer [1024];
	int size=sizeof (client);
 
	sockfd=socket (2, 1 ,  0);
	host.sin_family=AF_INET;
	host.sin_port=htons (atoi (argv [1]));
	host.sin_addr.s_addr=0;
	bind (sockfd, (struct sockaddr*)&host, sizeof (struct sockaddr));
	listen (sockfd, 1);
 
	while (1)
	{
		newsock=accept (sockfd, (struct sockaddr*)&client, &size);
		printf ("Got connection from %s:%d\n", inet_ntoa (client.sin_addr), ntohs (client.sin_port));
 
		do
		{
			time_t now=time (0);
			struct tm *ahora;
			ahora=localtime ((const time_t*)&now);
			strftime (buffer, 1024, "%d/%m/%Y %H:%M:%S \n" , ahora);
			buffer [strlen (buffer)] = 0;
			cont=send (newsock, &buffer, strlen (buffer), 0);
			sleep (1);
		}	while (cont == strlen (buffer));
 
		printf ("Finishing connection from %s:%d\n\n", inet_ntoa (client.sin_addr), ntohs (client.sin_port));
		close (newsock);
	}
	close (sockfd);
	return 0;
}
 

#include <fcntl.h>
 
int main ()
{
	int origen=open ("./origen", O_RDONLY), destino=open ("./destino", O_RDWR|O_CREAT|O_TRUNC, 0777); char buffer [15];
	read (origen, buffer, 15); write (destino, &buffer, sizeof (buffer));
	close (origen); close (destino); return 0;
}
 

#include <stdio.h>
int main ()
{
printf ("1\n");
printf ("2\n");
lseek (stdin, 0, 0);
printf ("3\n");
return 0;
}
 

$ gcc -o code code.c
$./code
3
2
$

#include <stdio.h>
#include <string.h>
#define direcc "dicc.txt"
#define intentos 7
 
int main ()
{
	printf ("Ah0rcad0 0.2 : Sagrini 2011 : 28/12/2011\n");
	printf ("Intenta adivinar la palabra secreta. Animo, tienes 7 intentos!\n");
 
	FILE *fp = fopen (direcc, "r+"); char word [6]; char pista [50];
	if (fp == NULL) {	printf ("[!] El archivo %s no existe!\n\n", direcc); return 1;	}
	while (!feof (fp))
	{
		printf ("\n---\n");
		fgets (word, 6, fp); fgetc (fp);
		fgets (pista, 50, fp);
		printf ("PISTA: %s\n", pista);
		int len = strlen (word); char palabra [len], final [len]; char car; int cont; int aciertos = 0, tick;
		strncpy (palabra, word, len); memset (final, '-', len); final [len] = '\0'; palabra [len] = '\0';
 
		while (strcmp (final, palabra) != 0)
		{
			final [0] = palabra [0];
			printf ("Escribe una letra: "); car=getchar ();
			for (cont=0; cont<len; cont++)	if (car == palabra [cont]) { final [cont] = car; tick = 1; }
			if (tick != 1)	aciertos++;
			else 		tick = 0; while (getchar () != '\n');
			printf ("%s (%d fallos)\n", final, aciertos);
			if (aciertos >= intentos) break;
		}
 
		if (aciertos >= intentos)	printf ("\nMala suerte, otra vez sera!\n");
		else			printf ("\nFelicidades! ;) %d fallo/s!\n", aciertos);
	}
 
	fclose (fp); return 0;
}
 
 
 

while (getchar () != 0) car=getchar ();

#include <stdio.h>
#include <string.h>
 
int main ()
{
    char palabra [7], final [7], car; int cont; memset (final, '-', 6); final [6] = '\0';
    printf ("Escribe una palabra (lenght -7 chars): "); fgets (palabra, 7, stdin); palabra [6] = '\0';
 
    while (strcmp (palabra, final) != 0)
    {
            printf ("\nEscribe una letra: "); car=getchar (); // car = fgetc (stdin);
            for (cont=0; cont<6; cont++)    { if (car == palabra [cont]) final [cont] = car; }
            printf ("%s\n", final); car = 0;
    }
 
    printf ("Well done! ;)\n\n"); getchar (); return 0;
}
 

$ ./code
Escribe una palabra (lenght -7 chars): willix

Escribe una letra: ------

Escribe una letra: w
w-----

Escribe una letra: w-----

Escribe una letra: i
wi--i-

Escribe una letra: wi--i-

Escribe una letra: l
willi-

Escribe una letra: willi-

Escribe una letra: x
willix
Well done! ;)
$