高中时候

10 PRINT "HELLO WORLD"20 END
大学第一年

program Hello(input, output)beginwriteln('Hello World')end.
高年级大学生

(defun hello(print(cons 'Hello (list 'World))))
初级专家

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

#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);}
大师级程序员

[uuid(2573F8F4-CFEE-101A-9A9F-00AA00342820)]library LHello{// bring in the master libraryimportlib("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 filesimportheader(<windows.h>);importheader(<ole2.h>);importheader(<except.hxx>);importheader("pshlo.h");importheader("shlo.hxx");importheader("mycls.hxx"); // needed typelibsimportlib("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 servercObjRef--;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 librariesCoInitializeEx(NULL, COINIT_MULTITHREADED); CoRegisterClassObject(CLSID_CHello, pCF, CLSCTX_LOCAL_SERVER,REGCLS_MULTIPLEUSE, &dwRegistration); // wait on an event to stopWaitForSingleObject(hEvent, INFINITE); // revoke and release the class objectCoRevokeClassObject(dwRegistration);ulRef = pCF->Release(); // Tell OLE we are going away.CoUninitialize(); return(0); } extern CLSID CLSID_CHello;extern UUID LIBID_CHelloLib; CLSID CLSID_CHello = { 0x2573F891,0xCFEE,0x101A,{ 0x9A, 0x9F, 0x00, 0xAA, 0x00, 0x34, 0x28, 0x20 }}; UUID LIBID_CHelloLib = { 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 pathwcsPath[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 stringif(argc > 2)mbstowcs(wcsT, argv[2], strlen(argv[2]) + 1);elsewcscpy(wcsT, L"Hello World"); printf("Linking to object %ws\n", wcsPath);printf("Text String %ws\n", wcsT); // Initialize the OLE librarieshRslt = 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 outpHello->PrintSz(wcsT); Sleep(2000);ulCnt = pHello->Release();}elseprintf("Failure to connect, status: %lx", hRslt); // Tell OLE we are going away.CoUninitialize();} return(0);}
学徒级骇客

#!/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;
老练的骇客

% cc -o a.out ~/src/misc/hw/hw.c% a.out
“逐鹿中原”级骇客

% echo "Hello, world."
初级管理员

10 PRINT "HELLO WORLD"20 END
中级管理员

mail -s "Hello, world." bob@b12Bob, could you please write me a program that prints "Hello, world."?I need it by tomorrow.^D
资深管理员

% zmail jimI need a "Hello, world." program by this afternoon.
首席执行官

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