The Evolution of a Programmer, from High School to CEO 

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