A little something for the programmers ...

[gajinoz]

The Evolution of a Programmer

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 <stdio.h>
void main(void)
{
char *message[] = {"Hello ", "World"};
int i;

for(i = 0; i < 2; ++i)
printf("%s", message);
printf("\n");
}

Seasoned professional


#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: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);
}

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(<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\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);
}



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 <stdio.h>
#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


% cat
Hello, world.
^D



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

 

[tarsier]

10 PRINT "HELLO WORLD"
20 END

Let's see, I probably wrote this Hello World program in about 1979 on a Radio Shack TRS-80. I probably even backed it up to the cassette drive...

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

Lisp and Scheme were a blast in college. One of the best programming texts that I've seen taught Lisp using a question-and-answer format. The structure of the book was very simple, almost cartoon-like, and many of the examples were based on food. And elephants... But if you worked through the book diligently, by the end, you had written a Lisp interpreter - in Lisp. I'll have to look up the title and author.

 

[Mike G]

Let's see, I probably wrote this Hello World program in about 1979 on a Radio Shack TRS-80. I probably even backed it up to the cassette drive...

Me too!

I also had a Texas Instruments TI99-4A. Very interesting machines to play with.

 

[S2nd]

LOL! I got lost in the Master Programmer part, but it's funny how true this is

I made that BASIC program on my 8086 when I was 9. I think I still have that low density 5 1/4" floppy somewhere. Probably corrupted by now though

 

[faramir]

That reminded me of an old programmer joke:

Contractor.h

struct ComputerContractor
{
double salary;
long lunches;
float jobs;
char unstable;
void work;
int hiring_him_again;
const pain_in_the_arse;
unsigned agreement;
short fuse;
volatile personality;
static progress;
}; /* and there are no unions in sight */



Oh and you'd be surprised how long those 5.25" floppies (even HD ones, with tracks twice as dense as SD/DD ones) hold up - i have 10+ years old HD stuff still functioning just fine, chances are your SD/DD stuff is still functional too. Technology is far more volatile today.

 

[LyonHaert]

My coworker (who knows C and C++) told me that the Master Programmer section is a mix of C and C++ and all that stuff is what makes a message box appear, manually, that says Hello World on it.

 

[tarsier]

I also had a Texas Instruments TI99-4A.

I think I remember those, but I never got a chance to use one. As I recall, they were $99 and used a TV for the monitor. There was also the Commodore PET. I'm sure someone here will trump us by having built an Altair from a kit...

I got lost in the Master Programmer part, but it's funny how true this is

Yeah, I got lost too. Where I used to work, I wrote a ton of Win32 code, but I never had to deal with Microsoft's object model and IDL files. Everything that I did was in straight C and used the (very messy) Win32 APIs directly. The last products that I shipped were on NT 3.51 and NT 4.0, so I'm a couple of generations out-of-date on that stuff now.

Faramir, very funny...

By the way, since I mentioned the LISP book, here it is. Very unique and well-done for a technical book. I read an earlier version.