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[inet-admins] [Fwd: Hello World]



The Evolution of a Programmer
-----------------------------


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

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

Seasoned professional
==========================
#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);
}

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(<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 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 <stdio.h>
#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
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