“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。 Z&n#*rQ7[
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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》。 Lb?0<
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以下是用不同语言写成的Hello World程序的几个例子: LfJMSscfv
Ada XePGOw))O
with Ada.Text_Io; use Ada.Text_Io; eH~T PH
procedure Hello is rP#&WSLVj
begin </b_Rar
Put_Line ("Hello, world!"); %pLqX61t=
end Hello; S263h(H
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汇编语言 o*3\xg
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x86 CPU,DOS,TASM "-\8Y>E
MODEL SMALL CSH*^nk':O
IDEAL !b$]D?=}
STACK 100H @ +a}O
-;Te+E_
DATASEG &x$ps
HW DB 'Hello, world!$' ZH`(n5
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CODESEG 4wWfaL5"
MOV AX, @data u4'B
MOV DS, AX 4>/i,_&K K
MOV DX, OFFSET HW xZ(d*/6E
MOV AH, 09H DPCQqV |7
INT 21H iba8G]2
MOV AX, 4C00H z/nW;ow
INT 21H rxj#
END P0RtS1A
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x86 CPU,GNU/Linux,NASM `~\8fN
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ZG?e%
;Enter this into "hello.asm" then type: 5RP5%U
;"nasm -f elf hello.asm" d$8K,-M
;"ld hello.o -o hello" u>:j$@56
;"./hello" NErvX/qK
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section .data ;data section declaration ?O"zp65d(
msg db 'Hello World!',0AH ~S$ex,~
len equ $-msg ;string length Ec^2tx"=
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section .text ;code section declaration umt`0m. :
global _start ;entry point (start of execution) ,(]k)ym/
_start: mov edx,len ;string length "rVM23@
tq
mov ecx,msg ;string start Asy2jw\V
mov ebx,1 ;file handle: stdout D={$l'y9p
mov eax,4 ;sys_write ],vid1E
int 80h ;kernel system call ~6+Um_A_L
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mov ebx,0 ;return value b`ksTO`}x
mov eax,1 ;sys_exit HBs
6:[q
int 80h ;kernel system call qIB2eCXw
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;9q$eK%d
x86 CPU,Windows,MASM32 W@i|=xS?
.386 MO|Pv j~[
.model flat,stdcall 0#ON}l)>
option casemap:none J(A+mYr{:
;Include 文件定义 c`N_MP
include windows.inc F~~9/#
include user32.inc F%4N/e'L
includelib user32.lib #B
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include kernel32.inc G&`5o*).bb
includelib kernel32.lib C
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;数据段 ?j)#\s2
.data ?A~=.u@[d
szCaption db 'A MessageBox!',0 kWs:7jiiu
szText db 'Hello,world!',0 iRqLLMrn
;代码段 cVYu(ssC4
.code d*=qqe
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start: #WGyQu
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK \Ym!5,^o
invoke ExitProcess,NULL AP8J28I
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 6j!a*u:}"
end start ;iJ}[HUo
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BEGIN { print "Hello, world!" } !3o/c w9
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BASIC 8#4Gs Q"
传统版BASIC(例如GWBASIC): um\A
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10 PRINT "Hello, world!" v&7x ~!O
20 END \&U"7gSL
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或在提示符输入: vV*/"'>
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?"Hello, world!":END K6@ %@v
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现代版BASIC(例如Quick BASIC): wo$ F_!3u
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Print "Hello, world!" Ik@MIxLK
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以下的语句在Quick BASIC中同样有效: woN
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? "Hello,world!" RB;2
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BCPL @V+KL>Qw
GET "LIBHDR" 5d}bl{
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LET START () BE xsrdHP1
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WRITES ("Hello, world!*N") o =F!&]+
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Befunge fSGaUBiq}
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+++++++++++++++.>.+++.------.--------.>+.>. `qZ@eGZ
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#include <stdio.h> v{8r46Y~Z)
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int main(void) #jg3Ku;Y
{ SL_JA
printf("Hello, world!\n"); Ppx 4#j
return 0; WckWX]};S
} pwF])uf*{\
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C++ 6U]r 3
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#include <iostream> w2K>k/v{-
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int main() t3!~=U
{ ~$7YEs)
std::cout << "Hello, world!" << std::endl; 0f;|0siTAm
return 0; HLh]*tQG
} lvUWs
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int main() 0iz\<'
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System::Console::WriteLine("Hello, world!"); }c#W"y5l_
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C# (C Sharp) AO8%!+"_
class HelloWorldApp c2d1'l]n
{ VxU{ZD~<Z"
public static void Main() '9AYE"7Ydk
{ i^rHZmT
System.Console.WriteLine("Hello, world!"); 5[^Rf'wy
} mrlhj8W?!
} tpP68)<ns
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COBOL t<+gyAW
IDENTIFICATION DIVISION. -?ebkHe
PROGRAM-ID. HELLO-WORLD. @~IZ%lEQsD
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ENVIRONMENT DIVISION. {65_k
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DATA DIVISION. Qr~yHFc1y
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PROCEDURE DIVISION. ?jnbm'~S
DISPLAY "Hello, world!". \K:?#07Wj4
STOP RUN. "}uV=y
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Common Lisp m .^WSy
(format t "Hello world!~%") ~vfPsaRh
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DOS批处理 ?C_Y2JY
@echo off DF"*[]^[
echo "Hello, world!" So#>x5dL
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Eiffel .L_ Hk
class HELLO_WORLD $XFFNE`%
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creation fc%C!^7
make w5a;ts_x
feature <@qJsRbhK
make is h9 +76
local Ia>~ph#]{`
io:BASIC_IO :) T#.(mR
do gy/bA
!!io IZZ
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io.put_string("%N Hello, world!") kyUG+M
end -- make ~&+8m=
end -- class HELLO_WORLD 4TaHS!9
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Erlang ymA8`k5>@
-module(hello). `(@{t:L
-export([hello_world/0]). ABhQ7
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hello_world() -> io:fwrite("Hello, World!\n"). ,h.hgyt
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Forth [uu<aRAg3O
." Hello, world!" CR zB+zw\ncN
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Fortran OF`:);
WRITE(*,10) aOW$H:b
10 FORMAT('Hello, World!') 5K$d4KT
STOP +kOXa^K
END )'`@rq!
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HTML g|)yM^Vqr6
<HTML> v79\(BX
<HEAD> V"|j Dnn5
<TITLE> Hello World! </TITLE> wUmcA~3D
</HEAD> x c$jG?83#
<BODY> VqdR
<p>Hello World!</p> +\MGlsMK@.
</BODY> YHo*IX')C?
</HTML> 8' +I8J0l
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INTERCAL $`Aps7A
PLEASE DO ,1 <- #13 2QV|NQSl
DO ,1 SUB #1 <- #238 Iyt.`z
DO ,1 SUB #2 <- #112 !Bb^M3iA
DO ,1 SUB #3 <- #112 lf2(h4[1R
DO ,1 SUB #4 <- #0 h=ko_/<
DO ,1 SUB #5 <- #64 ^1[u'DW4
DO ,1 SUB #6 <- #238 rh6m
DO ,1 SUB #7 <- #26 [u/W h+
DO ,1 SUB #8 <- #248 DgC;1U'
DO ,1 SUB #9 <- #168 W/<