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Hello World

Dies sind "Hello World" Programme von Leuten in unterschiedlichen Stufen ihrer "Karriere".

High School / Jr. High
[code=basic]10 PRINT "HELLO WORLD"
20 END[/code]

First year in College
[code=pascal]program Hello(input, output)
  begin
    writeln('Hello World')
  end.[/code]

Senior year in College
[code=lisp](defun hello
  (print
    (cons 'Hello (list 'World))))[/code]

New professional
[code=c]#include <stdio.h>
void main(void)
{
  char *message[] = {"Hello ", "World"};
  int i;

  for(i = 0; i < 2; ++i)
    printf("%s", message[i]);
  printf("\n");
}[/code]

Seasoned professional
[code=cpp]#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 << end1;

  return(0);
}[/code]

Master Programmer
[code=cpp][
uuid(2573F8F4-CFEE-101A-9A9E-00AA00342820)
]
library LHello
{
  // bring in the master library
  importlib("actimp.tlb");
  importlib("actexp.tlb");

  // bring in my interfaces
  #include "pshlo.idl"

  [
  uuid(2573F8F4-CFEE-101A-9A9E-00AA00342820)
  ]
  cotype THello
{
interface IHello;
interface IPersistFile;
};
};

[
exe,
uuid(2573F8F4-CFEE-101A-9A9E-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;
};

#include <windows.h>
#include <ole2.h>
#include <stdio.h>
#include <stdlib.h>
#include "thlo.h"
#include "pshlo.h"
#include "shlo.hxx"
#include "mycls.hxx"

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 _cdec1 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>
#include <string.h>
#include <stdio.h>
#include "pshlo.h"
#include "shlo.hxx"
#include "clsid.h"

int _cdec1 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] = '&slash;0';
wcsT[0] = '&slash;0';
if(argc 1) {
  mbstowcs(wcsPath, argv[1], strlen(argv[1]) + 1);
  wcsupr(wcsPath);
  }
else {
  fprintf(strderr, "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.
  CoUnitialize();
  }

return(0);
}[/code]

Apprentice Hacker
[code=perl]#!/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;[/code]

Experienced Hacker
[code=c]#include <stdio.h>
#define S "Hello, World\n"
main(){exit(printf(S) == strlen(S) ? 0 : 1);}[/code]

Seasoned Hacker
[code=bash]% cc -o a.out ~/src/misc/hw/hw.c
% a.out[/code]

Guru Hacker
[code=bash]% cat
Hello, world.
^D[/code]

New Manager
[code=basic]10 PRINT "Hello world"
20 END[/code]

Middle Manager
[code=bash]% mail -s "Hello, world." bob@b12
Bob, could you please write me a program that prints "Hello, world."?
I need it by tomorrow.
^D[/code]

Senior Manager
[code=bash]% zmail jim
I need a "Hello, world." program by this afternoon.[/code]

Chief Executive
[code=bash]% letter
letter: Command not found.
% mail
To: ^X ^F ^C
% help mail
help: Command not found.
% damn!
: Event unrecognized
% logout[/code]