Evolution of a Programmer

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();

    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 <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 for 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);

}