Calm Hill My Random Thoughts

The Evolution of a Programmer

High School

10 PRINTHELLO 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(‘′)) {}

string(const string &amp;s) : size(s.size)

{ ptr = new char[size + 1]; strcpy(ptr, s.ptr); }

~string()

{ delete [] ptr; }

friend ostream &amp;operator <<(ostream &amp;, const string &amp;);

string &amp;operator=(const char *); };

ostream &amp;operator<<(ostream &amp;stream, const string &amp;s) {

return(stream << s.ptr); }

string &amp;string::operator=(const char *chrs) { if (this != &amp;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(“%wsn”, 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, &amp;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, 0×00, 0xAA, 0×00, 0×34, 0×28, 0×20 } };

UUID LIBID_CHelloLib = { / 2573F890-CFEE-101A-9A9F-00AA00342820 / 0x2573F890, 0xCFEE,

0x101A, { 0x9A, 0x9F, 0×00, 0xAA, 0×00, 0×34, 0×28, 0×20 } };

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] = ‘′; wcsT[0] = ‘′; if( argc > 1) {

mbstowcs(wcsPath, argv[1], strlen(argv[1]) + 1); wcsupr(wcsPath); } else { fprintf(stderr, “Object path must be specifiedn”);

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 %wsn”, wcsPath); printf(“Text String %wsn”, wcsT);

// Initialize the OLE libraries

hRslt = CoInitializeEx(NULL, COINIT_MULTITHREADED);

if(SUCCEEDED(hRslt)) {

hRslt = CreateFileMoniker(wcsPath, &amp;pmk); if(SUCCEEDED(hRslt))

hRslt = BindMoniker(pmk, 0, IID_IHello, (void **)&amp;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 (\(#ARGV &gt;= 0) { while(defined(\)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, Worldn”

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

Seasoned Hacker
% cc -o a.out ~/src/misc/hw/hw.c % a.out
Guru Hacker
% cat Hello, world. ^D
New Manager
10 PRINTHELLO 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

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