#include <stdio.h>
 
int main ()
{
	int integer, i;
 
	printf ("Introduzca un numero (!0): ");
	scanf ("%d", &integer);
	if (integer == 0)
	{
		printf ("[!!!] El valor no puede ser cero.\n\n");
		return 1;
	}
	if (integer < 0) integer *= -1;
 
	if (integer % 2 == 0 && integer % 5 == 0)
		printf ("El valor introducido es multiplo de 2 y de 5.\n\n");
	else
		printf ("El valor introducido no es multiplo de 2 y de 5.\n\n");
 
	return 0;
}
 

#include <sys/socket.h>
#include <arpa/inet.h>
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
int main (int argc, char *argv [])
{
	printf ("SmallServ 2.0 - Sagrini 2010 - elhacker.NET\n");
 
	if (argc<2)
	{
		printf ("Use: %s <port>\n\n", argv [0]);
		return 1;
	}
 
	int sockfd, newsock;
	struct sockaddr_in client, host;
	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, 3);
 
	while (1)
	{
		newsock=accept (sockfd, (struct sockaddr*)&client, &size);
		printf ("Everything's OK from %s:%d!\n", inet_ntoa (client.sin_addr), ntohs (client.sin_port));
		send (newsock, "OK!\r\n", 5, 0);
		close (newsock);
	}
	close (sockfd);
	return 0;
}
 

#include <stdio.h>
#include <string.h>
 
int main (int argc, char *argv [])
{
	printf ("Code 0.1 : Sagrini 2011 : elhacker.NET\n");
	if (argc != 3)
	{
		printf ("[!!!] Use: %s <word> <number>\n\n", argv [0]);
		return 1;
	}
 
	if (atoi (argv [2]) > strlen (argv [1]))
	{
		printf ("[!!!] Number %d is too long.\n\n", atoi (argv [2]));
		return 1;
	}
 
	printf ("Leter number %d of %s: %c.\n\n", atoi (argv [2]), argv [1], argv [1][atoi (argv [2])-1]);
	return 0;
}
 

sagrini@sagrini:~/Escritorio$ gcc -o code code.c
sagrini@sagrini:~/Escritorio$ ./code
code 0.1 : Sagrini 2011 : elhacker.NET
[!!!] Use: ./code <word> <number>

sagrini@sagrini:~/Escritorio$ ./code word
code 0.1 : Sagrini 2011 : elhacker.NET
[!!!] Use: ./code <word> <number>

sagrini@sagrini:~/Escritorio$ ./code word 7
code 0.1 : Sagrini 2011 : elhacker.NET
[!!!] Number 7 is too long.

sagrini@sagrini:~/Escritorio$ ./code word 2
code 0.1 : Sagrini 2011 : elhacker.NET
Leter number 2 of word: o.

sagrini@sagrini:~/Escritorio$ 

#include <stdio.h>
#define PI 3.314
 
int main ()
{
int pi = PI;
printf ("%d", pi);
return 0;
}