El weblog de Skatox

El primer año en la Universidad:

10 PRINT "HELLO WORLD"

20 END

El segundo año en la Universidad:

program Hello(input, output)

begin

writeln('Hello World')

end.

El Ultimo año en la Universidad:

(defun hello

(print

(cons 'Hello (list 'World))))

Recié graduado:

#include <stdio.h

void main(void)

{

char *message[] = {"Hello ", "World"}; int i;

for(i = 0; i < 2; ++i)

printf("%s", message[i]);

printf("\n");

}

Profesional con experiencia:

#include <iostream.h

#include <string.h

class string

{

private:

int size;

char *ptr;

public:

string() : size(0), ptr(new char('\0')) {}

string(const string &s) : size(s.size)

{

ptr = new char[size + 1];

strcpy(ptr, s.ptr);

}

~string()

{

delete [] ptr;

}

friend ostream &operator <<(ostream &, const string &);

string &operator=(const char *);

};

ostream &operator<<(ostream &stream, const string &s)

{

return(stream << s.ptr);

}

string &string::operator=(const char *chrs)

{

if (this != &chrs)

{

delete [] ptr;

size = strlen(chrs);

ptr = new char[size + 1];

strcpy(ptr, chrs);

}

return(*this);

}

int main()

{

string str;

str = "Hello World";

cout << str << endl;

return(0);

}

El aprendiz del Hacker

#!/usr/local/bin/perl

$msg="Hello, world.\n";

if ($#ARGV = 0) {

while(defined($arg=shift(@ARGV))) {

$outfilename = $arg;

open(FILE, "" . $outfilename) || die "Can't write $arg: $!\n"; print

(FILE $msg);

close(FILE) || die "Can't close $arg: $!\n";

}

} else {

print ($msg);

}1;

El Hacker con algo de experiencia:

#include <stdio.h

#define S "Hello, World\n"

main(){exit(printf(S) == strlen(S) ? 0 : 1);}

El Hacker maduro:

% cc -o a.out ~/src/misc/hw/hw.c

% a.out

Hacker "Gur"

% cat

Hello, world.

^D

El Nuevo Ejecutivo:

10 PRINT "HELLO WORLD"

20 END

El Manager de nivel intermedio:

mail -s "Hello, world." bob@b12

Bob, puedes escribirme un programa que diga "Hello, world."?

Lo necesito para mañana.

^D

El manager de nivel superior:

% zmail jim

Necesito un programa "Hello, world." para esta tarde.

El Presidente de la Compañía:

% letter

letter: Command not found.

% mail

To: ^X ^F ^C

% help mail

help: Command not found.

% maldicion!

!: Event unrecognized

% logout

EL Gran Maestro:

[

uuid(2573F8F4-CFEE-101A-9A9F-00AA00342820) ]

library LHello

{

// bring in the master library

importlib("actimp.tlb");

importlib("actexp.tlb");

// bring in my interfaces

#include "pshlo.idl"

[

uuid(2573F8F5-CFEE-101A-9A9F-00AA00342820) ]

cotype THello

{

interface IHello;

interface IPersistFile;

};

};

[

exe,

uuid(2573F890-CFEE-101A-9A9F-00AA00342820) ]

module CHelloLib

{

// some code related header files

importheader(<windows.h);

importheader(<ole2.h);

importheader(<except.hxx);

importheader("pshlo.h");

importheader("shlo.hxx");

importheader("mycls.hxx");

// needed typelibs

importlib("actimp.tlb");

importlib("actexp.tlb");

importlib("thlo.tlb");

[

uuid(2573F891-CFEE-101A-9A9F-00AA00342820), aggregatable

]

coclass CHello

{cotype THello;

};

};

#include "ipfix.hxx"

extern HANDLE hEvent;

class CHello : public CHelloBase

{

public:

IPFIX(CLSID_CHello);

CHello(IUnknown *pUnk);

~CHello();

HRESULT __stdcall PrintSz(LPWSTR pwszString);

private:

static int cObjRef;

};

int CHello::cObjRef = 0;

CHello::CHello(IUnknown *pUnk) : CHelloBase(pUnk)

{cObjRef++; return;

}

HRESULT __stdcall CHello::PrintSz(LPWSTR pwszString){

printf("%ws\n", pwszString);

return(ResultFromScode(S_OK));}

CHello::~CHello(void){

// when the object count goes to zero, stop the server

cObjRef--;

if( cObjRef == 0 )

PulseEvent(hEvent);

return;

}

#include <windows.h

#include <ole2.h

#include "pshlo.h"

#include "shlo.hxx"

#include "mycls.hxx"

HANDLE hEvent;

int _cdecl main(

int argc,

char * argv[]

) {

ULONG ulRef;

DWORD dwRegistration;

CHelloCF *pCF = new CHelloCF();

hEvent = CreateEvent(NULL, FALSE, FALSE, NULL); // Initialize the OLE

libraries

CoInitializeEx(NULL, COINIT_MULTITHREADED);

CoRegisterClassObject(CLSID_CHello, pCF,

CLSCTX_LOCAL_SERVER,

REGCLS_MULTIPLEUSE, &dwRegistration);

// wait on an event to stop

WaitForSingleObject(hEvent, INFINITE);

// revoke and release the class object

CoRevokeClassObject(dwRegistration); ulRef = pCF-Release();

// Tell OLE we are going away.

CoUninitialize();

return(0); }

extern CLSID CLSID_CHello;

extern UUID LIBID_CHelloLib;

CLSID CLSID_CHello = { /*

2573F891-CFEE-101A-9A9F-00AA00342820 */

0x2573F891,

0xCFEE,

0x101A,

{ 0x9A, 0x9F, 0x00, 0xAA, 0x00, 0x34, 0x28, 0x20 }

};

UUID LIBID_CHelloLib = { /*

2573F890-CFEE-101A-9A9F-00AA00342820 */

0x2573F890,

0xCFEE,

0x101A,

{ 0x9A, 0x9F, 0x00, 0xAA, 0x00, 0x34, 0x28, 0x20 }

};

#include <windows.h

#include <ole2.h

#include <stdlib.h

int _cdecl main(

int argc,

char * argv[]

) {

HRESULT hRslt;

IHello *pHello;

ULONG ulCnt;

IMoniker * pmk;

WCHAR wcsT[_MAX_PATH];

WCHAR wcsPath[2 * _MAX_PATH];

// get object path

wcsPath[0] = '\0';

wcsT[0] = '\0';

if( argc 1) {

mbstowcs(wcsPath, argv[1], strlen(argv[1]) + 1); wcsupr(wcsPath);

}

else {

fprintf(stderr, "Object path must be specified\n"); return(1);

}

// get print string

if(argc 2)

mbstowcs(wcsT, argv[2], strlen(argv[2]) + 1);

else

wcscpy(wcsT, L"Hello World");

printf("Linking to object %ws\n", wcsPath);

printf("Text String %ws\n", wcsT);

// Initialize the OLE libraries

hRslt = CoInitializeEx(NULL, COINIT_MULTITHREADED);

if(SUCCEEDED(hRslt)) {

hRslt = CreateFileMoniker(wcsPath, &pmk);

if(SUCCEEDED(hRslt))

hRslt = BindMoniker(pmk, 0, IID_IHello, (void **)&pHello);

if(SUCCEEDED(hRslt)) {

// print a string out

pHello-PrintSz(wcsT);

Sleep(2000);

ulCnt = pHello-Release();

}else

printf("Failure to connect, status: %lx", hRslt);

// Tell OLE we are going away.

CoUninitialize();

}return(0);

}