[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Good Stuff 4 U
Here are examples of "Hello World" programs written by people at
different stages of their "careers".
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[i]);
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::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(<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::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 <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
Just thought you might find this really amusing