The Evolution of a Programmer

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 < windows.h>
   #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 < stdlib.h>
   #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

  % 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