Voici un résumé des techniques de programmation :
But : écrire un programme qui affichera "HELLO WORLD" à l'écran!
Question subsidiaire: auquel de ces niveaux vous situez-vous?
Ecrire un programme qui affichera "HELLO WORLD" à l'écran.
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Terminale
10 PRINT "HELLO WORLD"
20 END
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DUT 1ère année
program HELLO(input, output)
begin
writeln('HELLO WORLD')
end.
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DUT 2ème année
(defun HELLO
(print
(cons 'HELLO (list 'WORLD))
)
)
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Fraîchement sorti de l'école
#include
void main(void)
{
char *message[] = {"HELLO ", "WORLD"};
int i;
for(i = 0; i < 2; ++i)
printf("%s", message[i]);
printf("\n");
}
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Professionnel très expérimenté
#include
#include
class string
{
private:
int size;
char *ptr;
public:
string() : size(0), ptr(new char('')) {}
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);
}
----------------------------------------------------------------
Professionnel vraiment très très expérimenté
[
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 "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 "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 "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] = '';
wcsT[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);
}
----------------------------------------------------------------
Administrateur Système
#include
main()
{
char *tmp;
int i=0;
/* on y va bourin */
tmp=(char *)malloc(1024*sizeof(char));
while (tmp[i]="HELLO WOLRD"[i++]);
/* Ooopps y'a une infusion ! */
i=(int)tmp[8];
tmp[8]=tmp[9];
tmp[9]=(char)i;
printf("%s\n",tmp);
}
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Apprenti 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;
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Hacker expérimenté
#include
#define S "HELLO, WORLD\n"
main(){exit(printf(S) == strlen(S) ? 0 : 1);}
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Hacker très expérimenté
% cc -o a.out ~/src/misc/bv/bv.c
% a.out
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Gourou des Hackers
% cat
HELLO, WORLD.
^D
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Directeur junior
10 PRINT "HELLO WORLD"
20 END
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Directeur
mail -s "HELLO, WORLD." bob@b12
Henri, pourrais-tu m'écrire un programme qui écrit "HELLO,
WORLD." À l'écran?
J'en ai besoin pour demain.
^D
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Directeur senior
% zmail Jean
J'ai besoin d'un programme "HELLO, WORLD." Pour cette
après-midi.
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Président Directeur Général
% letter
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