10 PRINT "HELLO WORLD"
20 END

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

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

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

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

#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);
   }

[
   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
   CoInitiali, 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);
   }

#!/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;

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

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

% cat
Hello, world.
^D

10 PRINT "HELLO WORLD"
20 END

mail -s "Hello, world." sal@b12

Sal, could you please write me a program that prints
"Hello, world."? I need it by tomorrow.

^D

% zmail all

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

% message
   message: Command not found
% pm
   pm: Command not found
% letter
   letter: Command not found.
% mail
   To: ^X ^F ^C
    help mail
   help: Command not found.
   what
   what: Command not found
   need help
   need: Command not found
    damn!
   !: Event unrecognized
   exit
   exit: Unknown
   quit
%
% logout

   Bipppp!  Pat?  Please page Chris for me.  NOW!