“Hello, World!”程序是一个只在计算机屏幕上打印出“Hello, World!”(英语,意为“世界,你好!”)字串的计算机程序。该程序通常是计算机程序设计语言的初学者所要学习编写的第一个程序。它还可以用来确定该语言的编译器、程序开发环境以及运行环境已经正确安装。 5OJ8o>BF
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 CBkI!
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以下是用不同语言写成的Hello World程序的几个例子: egXHp<bqw
Ada ^l,(~03_
with Ada.Text_Io; use Ada.Text_Io; i}tBB~]
procedure Hello is j\I{pW-
begin a *hWODYn
Put_Line ("Hello, world!"); c[IT?6J4
end Hello; kT-dQ32
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汇编语言 @PQ%
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x86 CPU,DOS,TASM z`Jcpt
MODEL SMALL xM+_rU
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IDEAL kVmRv.zZ
STACK 100H \X*Es.;|x
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DATASEG 'VMov
HW DB 'Hello, world!$' c 5%uiv]
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CODESEG =%)Y,
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MOV AX, @data @sr~&YhA
MOV DS, AX AT:L&~O.
MOV DX, OFFSET HW .S_7R/2(?
MOV AH, 09H }O+a
INT 21H
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MOV AX, 4C00H +nIjW;RU
INT 21H **G5fS.^W
END >fq]c
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x86 CPU,GNU/Linux,NASM k4E2OyCFoJ
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 69"4/n7B?
;Enter this into "hello.asm" then type: b)[2t^zG
;"nasm -f elf hello.asm" R/WbcQ)
;"ld hello.o -o hello" 3|0wD:Dy
;"./hello" 6"L,#aKm^
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section .data ;data section declaration J+(B]8aj
msg db 'Hello World!',0AH E]P7u"1
len equ $-msg ;string length Bjp4:;Bb
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section .text ;code section declaration ?onEqH>
global _start ;entry point (start of execution) KSYHG
_start: mov edx,len ;string length KU=+ 1,Jf
mov ecx,msg ;string start T!jMh-8
mov ebx,1 ;file handle: stdout 3
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mov eax,4 ;sys_write 9*2Q'z}_
int 80h ;kernel system call
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mov ebx,0 ;return value ?Q[b1: ;Lm
mov eax,1 ;sys_exit ujf]@L?
int 80h ;kernel system call 3+/^
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x86 CPU,Windows,MASM32 <'N~|B/yZ
.386 o}=c(u
.model flat,stdcall UlMc8 z
option casemap:none 7NMy1'-q
;Include 文件定义 s}<i[hY>
include windows.inc ;r BbLM`
include user32.inc ~='}(Fg:
includelib user32.lib [85b+SKW
include kernel32.inc =lmelo#m&
includelib kernel32.lib Vz]yJ:
;数据段 &U_T1-UR2
.data m^o?{
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szCaption db 'A MessageBox!',0 RDOV+2K
szText db 'Hello,world!',0 }1mkX\wWP
;代码段 wCEcMVT
.code =bOMtQ]
start: Hbl&)!I
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 0C4Os p
invoke ExitProcess,NULL C'6c,
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 4*9BAv
end start zmhAeblA
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AWK k{
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BEGIN { print "Hello, world!" } 5^Ny6t
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BASIC wAo6:)
传统版BASIC(例如GWBASIC): ao"Z%#Jb~
^[VEr"X
10 PRINT "Hello, world!" E
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20 END l%
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或在提示符输入: sWKv>bx
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?"Hello, world!":END +4F; m_G6
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现代版BASIC(例如Quick BASIC): bsc#Oq]
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Print "Hello, world!" k)zBw(wr
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以下的语句在Quick BASIC中同样有效: 24*3m&fA*K
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? "Hello,world!" b?/Su<q
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BCPL zVis"g`
GET "LIBHDR" 3}B-n!|*
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LET START () BE p7L6~IN
$( f[q_eY
WRITES ("Hello, world!*N") _8 l=65GW
$) Z
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Befunge q)PSHr=Z
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, y2PxC. -
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C =|d5V% mK
#include <stdio.h> ?h8/\~Dw
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int main(void) s%?<:9
{ xG(:O@
printf("Hello, world!\n"); F|&mxsL
return 0; fVZ_*'v
} U}{\qs-z t
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C++ B,Jn.YX
#include <iostream> eoPoGC
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int main() =OR&,xt
{ ;e~K<vMm;y
std::cout << "Hello, world!" << std::endl; }80n5X<9
return 0; 1'5!")r
} /PkOF((
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C++/CLI 87nsWBe
int main() *kDV ^RBfq
{ :wJ!rn,4
System::Console::WriteLine("Hello, world!"); _[
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} 16I(S
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C# (C Sharp) BCHI@a
class HelloWorldApp hpticW|
{ 2K'}Vm+
public static void Main() xX])IZD
{ OZh+x`' #
System.Console.WriteLine("Hello, world!"); j0jam:.p
} 3K_!:[
} t{/
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COBOL v aaZ
IDENTIFICATION DIVISION. II_MY#0X
PROGRAM-ID. HELLO-WORLD. H
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,<-a 6
ENVIRONMENT DIVISION. )5bdWJ>l
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DATA DIVISION. GgjBLe=C
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PROCEDURE DIVISION. sfNAGez
DISPLAY "Hello, world!". RrqZ5Gonj
STOP RUN. +<I1@C
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Common Lisp x9CI>l
(format t "Hello world!~%") b;Im +9&
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DOS批处理 & ~[%N
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@echo off P.1iuZ "w
echo "Hello, world!" 7f
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Eiffel 3/@'tLtN
class HELLO_WORLD Jq`fD~(7
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creation OiY2l;68
make D 2Go,1
feature \9k{"4jX\
make is 4/U]7Y
local LGCL*Qbsg
io:BASIC_IO RN:#+S(8
do (A&@
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!!io [%nG_np
io.put_string("%N Hello, world!") L ou4M
end -- make l7J_s?!j
end -- class HELLO_WORLD 1y"37;x
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Erlang L}a3!33)C
-module(hello). D&9j$#9Rh
-export([hello_world/0]). N<> dg
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hello_world() -> io:fwrite("Hello, World!\n"). #-HN[U?Gs
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Forth \
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." Hello, world!" CR kdYl>M
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Fortran fF[ g%?w
WRITE(*,10) C${TC+z
10 FORMAT('Hello, World!') 4QZy-a*tA
STOP
=;/h{
t
END }C&c=3V
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HTML \!V6` @0KC
<HTML> M7>\Qk
<HEAD> !3&vgvr
<TITLE> Hello World! </TITLE> `A^} X
</HEAD> 7:j #1N[p
<BODY> _5LlL#)
<p>Hello World!</p> ^c7L!F
</BODY> 6kuSkd$.
</HTML> y14@9<~9
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H )nk>*oE
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H5I#/j
INTERCAL 0Yjy
PLEASE DO ,1 <- #13 |5/[0V-vy
DO ,1 SUB #1 <- #238 :ZIcWIV-
DO ,1 SUB #2 <- #112 Ji[w; [qL
DO ,1 SUB #3 <- #112 W[m_IY
DO ,1 SUB #4 <- #0 `3:%F>
DO ,1 SUB #5 <- #64 D_)vGvv3;.
DO ,1 SUB #6 <- #238 z} \9/`
DO ,1 SUB #7 <- #26 (~GFd7
DO ,1 SUB #8 <- #248 #?=cg]v_
DO ,1 SUB #9 <- #168 Jr9}'l8
DO ,1 SUB #10 <- #24 +J4t0x
DO ,1 SUB #11 <- #16 j&pgq2Kl
DO ,1 SUB #12 <- #158 s?E: ]
DO ,1 SUB #13 <- #52 ?f`-&c;
PLEASE READ OUT ,1 wm8x1+P
PLEASE GIVE UP ;hvXFU
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Java *^uj(8U
public class Hello lBdF9F<
{ |Q;o538
public static void main(String[] args) I@ k8^
{ +;Gl>$
System.out.println("Hello, world!"); rh&on