High School/Jr. High
10 PRINT "HELLO WORLD"
20 END
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First Year in College
program Hello(input, output)
begin
writeln('Hello World')
end.
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Senior Year in College
(defun hello
(print
(cons 'Hello (list 'World))))
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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");
}
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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 dword typelibs chellocf(); code ulong some regcls_multipleuse, object "ipfix.hxx" waitforsingleobject(hevent, uuid(2573f890-cfee-101a-9a9f-00aa00342820) uuid(2573f891-cfee-101a-9a9f-00aa00342820), public chello importheader("mycls.hxx"); pcf, &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);
}
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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;
};
}; header main( &, const string &); private: if( *punk) {windows.h} {stdio.h} corevokeclassobject(dwregistration); files // coinitializeex(null, *pcf=new module chello::chello(iunknown &operator=(const char *); on class __stdcall ole cobjref++; argv[] the "thlo.h" int chello::~chello(void) chellobase(punk) event ulref; and coinit_multithreaded); to {stdlib.h} initialize pwszstring); chello::cobjref=0; infinite); handle printf("%ws\n", exe, ~chello(); } null); { cobjref--; static importheader("pshlo.h"); hevent; importlib("actexp.tlb"); ulref=pCF- revoke _cdecl "shlo.hxx" public: related "windows.h" {ole2.h} server false, pulseevent(hevent); return; ostream extern argc, ] when chellobase [ "mycls.hxx" importheader("shlo.hxx"); -- &dwregistration); thello; importlib("thlo.tlb"); coclass chellolib cotype importheader({windows.h}); goes count hresult char : hevent=CreateEvent(NULL, chello(iunknown coregisterclassobject(clsid_chello, chellocf aggregatable 0 libraries #include an string * ) *punk); pwszstring) importlib("actimp.tlb"); "pshlo.h" importheader("except.hxx"); clsctx_local_server, chello:
rintsz(lpwstr stop printsz(lpwstr cobjref; }; cobjref zero, release dwregistration; return(resultfromscode(s_ok)); ipfix(clsid_chello); importheader({ole2.h}); needed wait>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);
}
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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;
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Experienced Hacker
#include {stdio.h}
#define S "Hello, World\n"
main(){exit(printf(S) -- strlen(S) ? 0 : 1);}
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Seasoned Hacker
% cc -o a.out ~/src/misc/hw/hw.c
% a.out
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Guru Hacker
% cat
Hello, world.
^D
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New Manager
10 PRINT "HELLO WORLD"
20 END
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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
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Senior Manager
% zmail jim
I need a "Hello, world." program by this afternoon.
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Chief Executive
% letter
letter: Command not found.
% mail
To: ^X ^F ^C
% help mail
help: Command not found.
% damn!
!: Event unrecognized
% logout
The Evolution of a Programmer
