Hello World로 알아보는 프로그램 유형
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Contents

1 중고등학생
2 대학 신입생
3 대학 2학년
4 신임 교수
5 계약직 전문가
6 마스터 프로그래머
7 숙련된 해커
8 철새 해커
9 구루(지존) 해커
10 신?관리자
11 중견 관리자
12 최고 경영자

1 중고등학생 

 10 PRINT "HELLO WORLD" 
 20 END

2 대학 신입생 

 program Hello(input, output) 
 begin 
 writeln("Hello World") 
 end.

3 대학 2학년 

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

4 신임 교수 

#include <stdio.h> 
void main(void) 
{ 
    char *message[] = {"Hello ", "World"}; 
    int i; 
    for(i = 0; i < 2; ++i) 
        printf("%s", message[i]); 
    printf("\n"); 
}

5 계약직 전문가 

#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) 
{ 
    rettream << 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); 
}

6 마스터 프로그래머 

[ 
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 
    importlibctimp.tlb"); 
    importlib("actexp.tlb"); 
    importlib("thlo.tlb"); 
[ 
uuid(2573F891-CFEE-101A-9A9F-00AA00342820),  
#include "ipfix.hxx" 
extern HANDLE hEvent; 
class CHello : public CHelloBase 
{ 
    public: 
        IPFIX(CLSID_CHello); 
        CHello(IUnknown *pUnk); 
        ~CHello(); 
        HRESULT __stdcall PrintSz(LPWSTR pwszString); 
        aggregatable 
] 
    coclass CHello 
    { 
    cotype THello; 
    }; 
}; 
private: 
static int cObjRef; 
}; 
 
#include <windows.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 importlib("actexp.tlb"); 
importlib("thlo.tlb"); 
[ 
uuid(2573F891-CFEE-101A-9A9F-00AA00342820),  
#include "ipfix.hxx" 
extern HANDLE hEvent; 
class CHello : public CHelloBase 
{ 
    public: 
        IPFIX(CLSID_CHello); 
        CHello(IUnknown *pUnk); 
        ~CHello(); 
        HRESULT __stdcall PrintSz(LPWSTR pwszString); 
        aggregatable 
] 
    coclass CHello 
    { 
        cotype THello; 
    }; 
}; 
private: 
static int cObjRef; 
}; 
 
#include <windows.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  
nclude "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, 
nclude 
#include 
#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 
CEEDED(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); 
} 
 
==== 초보 해커 ==== 
{{{#!plain 
#!/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); 
}

7 숙련된 해커 

#include <stdio.h>  
#define S "Hello, World\n" 
main(){exit(printf(S) == strlen(S) ? 0 : 1);}

8 철새 해커 

 % cc -o a.out ~/src/misc/hw/hw.c

9 구루(지존) 해커 

% cat 
Hello, world. 
^D

10 신?관리자 

 10 PRINT "HELLO WORLD" 
 20 END

11 중견 관리자 

mail -s "Hello, world." bob@b12 
Bob, could you please write me a programt prints "Hello, 
world."? 
I need it by tomorrow. 
^D
==== 고위 관리자
% zmail jim 
I need a "Hello, world." program by this afternoon.

12 최고 경영자 

% letter 
letter: Command not found. 
% mail 
To: ^X ^F ^C 
% help mail 
help: Command not found. 
% damn! 
!: Event unrecognized 
% logout
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