Эволюция программиста

Я специально не стал переводить этот текст, такие вещи надо читать в оригинале.

High School/Jr.High
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10 PRINT «HELLO WORLD»
20 END

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First year in College
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program Hello(input, output)
begin
writeln(‘Hello World’)
end.

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Senior year in College
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(defun hello
(print
(cons ‘Hello (list ‘World))))

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New professional
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#include <stdio.h>
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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Seasoned professional
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#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);
}

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Master Programmer
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[
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);
}

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Apprentice Hacker
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#!/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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Experienced Hacker
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#include <stdio.h>
#define S «Hello, World\n»
main(){exit(printf(S) == strlen(S) ? 0 : 1);}

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Seasoned Hacker
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% cc -o a.out ~/src/misc/hw/hw.c
% a.out

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Guru Hacker
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% cat
Hello, world.
^D

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New Manager
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10 PRINT «HELLO WORLD»
20 END

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Middle Manager
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mail -s «Hello, world.» bob@b12
Bob, could you please write me a program that prints «Hello,
world.»?
I need it by tomorrow.
^D

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Senior Manager
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% zmail jim
I need a «Hello, world.» program by this afternoon.

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