HELLO, WORLD.
                                        
    
      _________________________________________________________________
    
    These are "Hello, world." programs written by different people:
    (You may need a little UNIX background to understand "Chief
    Executive")
    
      * [1]High School/Jr.High
      * [2]First year in College
      * [3]Senior year in College
      * [4]New professional
      * [5]Seasoned professional
      * [6]Master Programmer
      * [7]Apprentice Hacker
      * [8]Experienced Hacker
      * [9]Seasoned Hacker
      * [10]Guru Hacker
      * [11]New Manager
      * [12]Middle Manager
      * [13]Senior Manager
      * [14]Chief Executive
        
    
      _________________________________________________________________
    
    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
  void main(void)
  {
    char *message[] = {"Hello ", "World"};
    int i;
 
    for(i = 0; i < 2; ++i)
      printf("%s", message[i]);
    printf("\n");
  }
 
    
      _________________________________________________________________
    
    Seasoned professional
 
  #include 
  #include 
 
  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);
  }
 
    
      _________________________________________________________________
    
    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();
      importheader();
      importheader();
      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 
  #include 
  #include 
  #include 
  #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 
  #include 
  #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 
  #include 
  #include 
  #include 
  #include 
  #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 
  #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
 
 
  % cat
  Hello, world.
  ^D
 
    
      _________________________________________________________________
    
    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