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Articles: Talents | The Evolution of a Programmer
- Ms. Nayana D
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--------------------------------------------------------------------------------
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
% cat
Hello, world.
^D
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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
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