这篇趣文有一定历史了,应该至少有 10 年了。

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初中/高中(注:Basic)
- 10 PRINT "HELLO WORLD"
 - 20 END
 
大一(注:Pascal)
- (defun hello
 - (cons 'Hello (list 'World))))
 
大三/大四
- program Hallo(output);
 - begin
 - writeln('Hello, world!')
 - end.
 
入职第一年
- #include
 - void main(void)
 - {
 - char *message[] = {"Hello ", "World"};
 - int i;
 - for(i = 0; i < 2; ++i)
 - printf("%s", message[i]);
 - printf("\n");
 - }
 
入职干了几年
- #include
 - #include
 - 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);
 - }
 
大师程序员
- [
 - 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
 - ", 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);
 - }
 
#p#
新手黑客
- #!/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
- #include
 - #define S "Hello, World\n"
 - main(){exit(printf(S) == strlen(S) ? 0 : 1);}
 
入行干过好些年的黑客
- % cc -o a.out ~/src/misc/hw/hw.c
 - % a.out
 
黑客大师
- % echo "Hello, world."
 
新手经理
- 10 PRINT "HELLO WORLD"
 - 20 END
 
中级经理
- mail -s "Hello, world." bob@b12
 - 鲍勃,你能帮我写个输出“Hello, world.”的程序么?
 - 我明天就要。
 - 谢谢~
 
高级经理
- % zmail jim
 - Jim,我今天下午就要输出 “Hello, world.” 的程序!
 
CEO/首席执行官
- % letter
 - letter: Command not found.
 - To: ^X ^F ^C
 - % help mail
 - help: Command not found.
 - % damn!
 - !: Event unrecognized
 - % logout
 
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