初中/高中（注：Basic）
PRINT "HELLO WORLD"
END
 
大一（注：Pascal）
program Hallo(output);
begin
    writeln('Hello, world!')
end.
 
大三/大四
(defun hello
  (print
    (cons 'Hello (list 'World))))
 
入职第一年
#include <stdio.h>
void main(void)
{
  char *message[] = {"Hello ", "World"};
  int i;
 
  for(i = 0; i < 2; ++i)
    printf("%s", message[i]);
  printf("\n");
}
 
入职干了几年
#include <iostream.h>
#include <string.h>
 
class string
{
private:
  int size;
  char *ptr;
 
string() : size(0), ptr(new char[1]) { ptr[0] = 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: perator=(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);
}
 
大师程序员
  [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: rintSz(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 <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-> rintSz(wcsT);
 
   Sleep(2000);
   ulCnt = pHello->Release();
   }
      else
   printf("Failure to connect, status: %lx", hRslt);
 
      // Tell OLE we are going away.
      CoUninitialize();
      }
 
  return(0);
  }
 
新手黑客
#!/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;
 
有经验的黑客
#include <stdio.h>
#define S "Hello, World\n"
main(){exit(printf(S) == strlen(S) ? 0 : 1);}
 
入行干过好些年的黑客
% cc -o a.out ~/src/misc/hw/hw.c
% a.out
 
黑客大师
% echo "Hello, world."
 
新手经理
PRINT "HELLO WORLD"
END
中级经理
mail -s "Hello, world." bob@b12
鲍勃，你能帮我写个输出“Hello, world.”的程序么？
我明天就要。
谢谢~
 
高级经理
% zmail jim
Jim，我今天下午就要输出 “Hello, world.” 的程序！
 
CEO/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
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