一个程序员的成长

一个程序员的成长

中学：

10 PRINT \"HELLO WORLD\"

20 END

大学一年级：

program Hello(input, output)

begin

　writeln(\'Hello World\')

end.

大学高年级：

(defun hello

　(print

　　(cons \'Hello (list \'World))))

公司的程序员：

#include <stdio.h>

void main(void)

{

　char *message[] = {\"Hello \", \"World\"};

　int i;

　for(i = 0; i < 2; ++i) {

　　printf(\"%s\", message);

　　printf(\"\\n\");

　 }

经验丰富的专家：

#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);

}

公司的骨干：

[

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);

}

初级黑客：

#!/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;

经验丰富的黑客：

#include <stdio.h>

#define S \"Hello, World\\n\"

main(){exit(printf(S) == strlen(S) ? 0 : 1);}

老练的黑客：

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

% a.out

黑客导师：

% cat

Hello, world.

^D

初级管理者：

10 PRINT \"HELLO WORLD\"

20 END

中级管理者：

mail -s \"Hello, world.\" bob@b12

Bob, could you please write me a program that prints \"Hello, world.\"?

I need it by tomorrow.

^D

高级管理者：

% zmail jim

I need a \"Hello, world.\" program by this afternoon.

首席执行官：

% letter



letter: Command not found.

% mail

To: ^X ^F ^C

% help mail

help: Command not found.

% damn!

!: Event unrecognized

% logout

那我可是骨干程序员了 :D :D

有意思!

有意思!

还挺形象的

[quote]有意思!

还挺形象的 [/quote]