#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));
 
		while (cont != -1)
		{
			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);
		}
 
		printf ("Finishing connection from %s:%d\n\n", inet_ntoa (client.sin_addr), ntohs (client.sin_port));
		close (newsock);
	}
	close (sockfd);
	return 0;
}
 

$ gcc -o serv serv.c
$ ./serv 31337
Code 0.1 - Dealer 2011
Got connection from 127.0.0.1:48677
$ 
$ gdb -q serv
Leyendo símbolos desde /home/juanra/Escritorio/serv...(no se encontraron símbolos de depuración)hecho.
(gdb) r 31337
Starting program: /home/juanra/Escritorio/serv 31337
Code 0.1 - Dealer 2011
Got connection from 127.0.0.1:48678

Program received signal SIGPIPE, Broken pipe.
0x0012d422 in __kernel_vsyscall ()
(gdb)

$ nc -vv 127.0.0.1 31337
Connection to 127.0.0.1 31337 port [tcp/*] succeeded!
22/12/2011 13:57:09 
22/12/2011 13:57:10 
22/12/2011 13:57:11 
22/12/2011 13:57:12 
22/12/2011 13:57:13 
^C
$ nc -vv 127.0.0.1 31337
Connection to 127.0.0.1 31337 port [tcp/*] succeeded!
22/12/2011 13:57:33 
22/12/2011 13:57:34 
22/12/2011 13:57:35 
22/12/2011 13:57:36 
^C
$ 

#include <stdio.h>
 
int main ()
{
	printf ("Introduzca un numero entero: ");
	float a; scanf ("%f", &a); a=a*1.18;
	printf ("El numero introducido +IVA es %f.\n\n", a);
	return 0;
}
 

$ gcc -o code code.c
$ ./code
Introduzca un numero entero: 12
El numero introducido +IVA es 14.1600000.

$

int fctrs (int n, int x [])
{
	int a = n, i=1, cont=0;
	x [cont] = 1; cont++;
 
	for (i=2; i < n; i++)
		while (a%i == 0) { a=a/i; x [cont] = i; cont++; }
	x [cont] = 0;
	return cont;
}