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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 << end1;
 
  return(0);
}

[
uuid(2573F8F4-CFEE-101A-9A9E-00AA00342820)
]
library LHello
{
  // bring in the master library
  importlib("actimp.tlb");
  importlib("actexp.tlb");
 
  // bring in my interfaces
  #include "pshlo.idl"
 
  [
  uuid(2573F8F4-CFEE-101A-9A9E-00AA00342820)
  ]
  cotype THello
 {
 interface IHello;
 interface IPersistFile;
 };
};
 
[
exe,
uuid(2573F8F4-CFEE-101A-9A9E-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 _cdec1 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 _cdec1 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] = '&slash;0';
wcsT[0] = '&slash;0';
if(argc 1) {
  mbstowcs(wcsPath, argv[1], strlen(argv[1]) + 1);
  wcsupr(wcsPath);
  }
else {
  fprintf(strderr, "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.
  CoUnitialize();
  }
 
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." bob@b12
Bob, could you please write me a program that prints "Hello, world."?
I need it by tomorrow.
^D

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

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