Evolution eines Programmierers



Nach einen Post von Andreas Wildberger


Informatikunterricht in der AHS

 10 PRINT "HELLO WORLD"
 20 END

Erstes Studienjahr

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

Späteres Studienjahr

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

Neuer Mitarbeiter

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

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

Älterer Mitarbeiter

 #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 << endl;

   return(0);
 }

Chefprogrammierer

 [
 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\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 _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
         CoUninitialize();
     }

 return(0);
 }

Unerfahrener 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;

Erfahrener Hacker

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

Älterer Hacker

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

Hackerguru

 % cat
 Hello, world.
 ^D

Neuer Manager

 10 PRINT "HELLO WORLD"
 20 END

Höherer Manager

 mail -s "Hello, world." vylmazal b12
 Frau Vylmazal, könnten Sie mir bitte ein Programm schreiben, das "Hello, world." ausgibt?
 Ich würde es schon morgen brauchen.
 ^D

Mitgleid der Geschäftsleitung

 % zmail czerny
 Ich brauche ein "Hello, world." Programm bis heute Nachmittag.

Geschäftsführer

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

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