High School/Jr.High

10 PRINT «HELLO WORLD» 
20 END

First year in College 

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

Senior year in College

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

New professional

#include  
void main(void) 
{ 
 char *message[] = {«Hello «, «World»}; 
 int i;

 for(i = 0; i < 2; ++i) 
 printf(«%s», message[i]); 
 printf(«\n»); 
}

Seasoned 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); 
}

Master Programmer

[ 
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  
#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\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  
#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); 
}

Apprentice 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;

Experienced Hacker

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

Seasoned Hacker

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

Guru Hacker

 % echo «Hello, world.»

New Manager

 10 PRINT «HELLO WORLD» 
 20 END

Middle Manager

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

Senior Manager

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

Chief Executive

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