High School/Jr.High

10 PRINT "HELLO WORLD"
20 END

First year in College

program Hello(input, output)
  begin
    writeln('Hello World')
  end.

Senior year in College

(defun hello
print
(cons 'Hello (list 'World))))

New professional

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

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

Seasoned professional

#include <iostream.h>
#include <string.h>

class string
{
  private:
    int size;
    char *ptr;

  string() : size(0), ptr(new char[1]) { ptr[0] = 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);
}

Master Programmer

[
  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;
};

#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", 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>
#include <string.h>
#include <stdio.h>
#include "pshlo.h"
#include "shlo.hxx"
#include "clsid.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);
}

Apprentice 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;

Experienced Hacker

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

Seasoned Hacker

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

Guru Hacker

% echo "Hello, world."

New Manager

10 PRINT "HELLO WORLD"
20 END

Middle Manager

mail -s "Hello, world." bob@b12
Bob, could you please write me a program
that prints "Hello, world."?
I need it by tomorrow.
^D

Senior Manager

% zmail jim
I need a "Hello, world." program by this afternoon.

Chief Executive

% letter
letter: Command not found.
% mail
To: ^X ^F ^C
% help mail
help: Command not found.
% damn!
!: Event unrecognized
% logout

Source: Unknown