一个程序员的进化

本文由 IT江湖 翻译自 Ariel。

• 中学
  
  Java

  10 PRINT "HELLO WORLD" 20 END

  1 2	10 PRINT "HELLO WORLD" 20 END

• 在大学的第一年（大一）
  
  Java

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

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

• 在大学的第四年（大四）
  
  Java

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

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

• 实习生
  
  Java

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

• 有经验的程序员
  
  C

  #include <iostream.h> #include <string.h> class string { private: int size; char *ptr; string() : size(0), ptr(new char[1]) { ptr[0] = 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); }

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  #include <iostream.h>   #include <string.h>   class string   {   private:     int size;     char *ptr;   string() : size(0), ptr(new char[1]) { ptr[0] = 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);   }

• 核心程序员
  
  C

  [ 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 ", 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); }

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  [   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 ", 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);   }

• 初级黑客
  
  C

  #!/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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  #!/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;

• 有经验的黑客
  
  C

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

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

• 经验丰富的黑客
  
  C

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

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

• 大师级别的黑客
  
  1С (Код)

  % echo "Hello, world."

  1	% echo "Hello, world."

• 升值为经理
  
  Java

  10 PRINT "HELLO WORLD" 20 END

  1 2	10 PRINT "HELLO WORLD" 20 END

• 中级经理
  
  Java

  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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  mail -s "Hello, world." bob@b12   Bob, could you please write me a program that prints "Hello, world."?   I need it by tomorrow.   ^D

• 高级经理
  
  Java

  % zmail jim I need a "Hello, world." program by this afternoon.

  1 2	% zmail jim   I need a "Hello, world." program by this afternoon.

• 首席执行官/CEO
  
  Java

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

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