L’évolution d’un programmeur

High School/Junior 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
void main(void)
{
char *message[] = {« Hello « , « World »};
int i;

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

Seasoned professional

#include
#include

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();
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
#include
#include
#include
#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
#include
#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, 0×00, 0xAA, 0×00, 0×34, 0×28, 0×20 }
};

UUID LIBID_CHelloLib = { /* 2573F890-CFEE-101A-9A9F-00AA00342820 */
0x2573F890,
0xCFEE,
0x101A,
{ 0x9A, 0x9F, 0×00, 0xAA, 0×00, 0×34, 0×28, 0×20 }
};

#include
#include
#include
#include
#include
#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
#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