Macam-macam Pemrogram dalam Menulis "Hello, World!" dalam Bahasa C/C++

Ini mengingatkan saya pada lelucon lama ini:

Evolusi Programer

Jenjang SMA / SMP

10 PRINT "HELLO WORLD"
20 END

Tahun Pertama di Perguruan Tinggi

program Hello(input, output)
  begin
    writeln('Hello World')
  end.

Tingkat Akhir di Perguruan Tinggi

(defun hello
 (print
  (cons 'Hello (list 'World))))

Baru Bekerja sebagai profesional

#include
void main(void)
{
  char *message[] = {"Hello ", "World"};
  int i;
  for(i = 0; i < 2; ++i)
    printf("%s", message[i]);
  printf("\n");
}

Berpengalaman sebagai 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);
}

Programmer yang sudah Jago atau Menguasai

[
 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 
#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
 ", 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, 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 
#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);
} 

 

Evolusi seorang Hacker

Hacker yang sedang Magang

#!/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;

Hacker yang Sudah berpengalaman

#include 
#define S "Hello, World\n"
main(){exit(printf(S) == strlen(S) ? 0 : 1);} 

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

Hacker yang Sudah Jago Banget

% cat
Hello, world.
^D 

 

Evolusi seorang Manajer

Manajer Pemula

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

Manajer Berpengalaman

% zmail bill
I need a "Hello, world." program by this afternoon.

Ketua Pelaksana

C:\\% letter
letter: Command not found.
C:\\% mail
To: ^X ^F ^C
C:\\% help mail
help: Command not found.
C:\\% damn!
!: Event unrecognized
C:\\% jim come over here right now!

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translate : Richard Liu