“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。 p*5_+u
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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》。 =PY{Elf
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以下是用不同语言写成的Hello World程序的几个例子: m5
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Ada ECA<%'$?E
with Ada.Text_Io; use Ada.Text_Io; B-_b.4ND)
procedure Hello is ]QHp?Ii1
begin Wcc4/:`Hu
Put_Line ("Hello, world!"); CR23$<FC
end Hello; )EB+(c~E
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汇编语言 FS=yc.Q_
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x86 CPU,DOS,TASM z H-a%$5
MODEL SMALL &-qQF`7
IDEAL 8#JX#<HEo
STACK 100H ?R)dxuj
B(1-u!pz
DATASEG &~+QPnI>Pm
HW DB 'Hello, world!$' xE;O =mI
L(C`<iE&3
CODESEG Dfzj/spFV
MOV AX, @data m-azd~r[
MOV DS, AX d/yF}%0QI
MOV DX, OFFSET HW =q]!"yU[d
MOV AH, 09H Q;VuoHj!
INT 21H ?-:2f#bC
MOV AX, 4C00H @kh<b<a4
INT 21H FfM^2`xP
END DFWO5Y_
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x86 CPU,GNU/Linux,NASM p,8~)ic_
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 3%?tUt
;Enter this into "hello.asm" then type: `K5*Fjx
;"nasm -f elf hello.asm" 2rT^OGw6
;"ld hello.o -o hello" =[]6NjKS,
;"./hello" @~$"&B
gep#o$P
section .data ;data section declaration ]Ac}+?
msg db 'Hello World!',0AH ~5&4s
len equ $-msg ;string length
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section .text ;code section declaration nI]EfHU
global _start ;entry point (start of execution) exhU!p8
_start: mov edx,len ;string length .+ u
b\
mov ecx,msg ;string start ?Q-Tyf$3
mov ebx,1 ;file handle: stdout :CE4<
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mov eax,4 ;sys_write -&Xv,:'?
int 80h ;kernel system call ;9OhK71}
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mov ebx,0 ;return value `5@F'tKQ
mov eax,1 ;sys_exit J;obh.}u"{
int 80h ;kernel system call nte?a e
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@/<UhnI
x86 CPU,Windows,MASM32 #_35bg4h{
.386 L_!ShE
.model flat,stdcall _aPAn|.
option casemap:none
.fl r
;Include 文件定义 #3qeRl
include windows.inc DSz[,AaR]
include user32.inc C*(
includelib user32.lib v,ssv{gU
include kernel32.inc 4=tR_s
includelib kernel32.lib g&FTX>wX
;数据段 {zAI-?#*u
.data Zigv;}#
szCaption db 'A MessageBox!',0 mtv8Bm=<
szText db 'Hello,world!',0 ;yJ:W8U]+;
;代码段 |[>@Kk4
.code 3^y(@XFt
start: %rptI$^*X
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK X@`a_XAfd
invoke ExitProcess,NULL [
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 4qie&:4j
end start lv
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AWK Ki;SONSV~|
BEGIN { print "Hello, world!" } Xi&J%N'
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BASIC `t U
传统版BASIC(例如GWBASIC): 3gi)QCsk
OH\^j1x9I
10 PRINT "Hello, world!" ]Btkoad
20 END =j,WQ66r3
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或在提示符输入: WkTJ M
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?"Hello, world!":END >pU9}2fpT
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现代版BASIC(例如Quick BASIC): w"^h<]b
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Print "Hello, world!" L^+rsxR
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以下的语句在Quick BASIC中同样有效: !
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/v R>.'
? "Hello,world!"
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z:,PwLU
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BCPL cSb;a\el$
GET "LIBHDR" w_(3{P[Iz
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LET START () BE _[2@2q0
$( TekUY m!G
WRITES ("Hello, world!*N") Z3`EXs
$) @]@|H?
`%C -7D'?
7>E.0DP
Befunge Mbi]EZ
"!dlrow olleH">v [^5\Ww
, ^ Bx[%
^_@ Q.mJ7T~T
7GgZ: $d
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Brainfuck @+u>rS|IB
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< :L[>!~YG_n
+++++++++++++++.>.+++.------.--------.>+.>. 3nxG>D7
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C /(N/DMl[
#include <stdio.h> t[^$F,
ht3.e[%'b
int main(void) uw)7N(os\`
{ .w2 ID
printf("Hello, world!\n"); %q {q.(M#
return 0; K+B978XD
} FKa";f"
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C++ +a1x;
#include <iostream> mB?x_6#d9
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int main() 0'QWa{dS\
{ }Mcb\+[
std::cout << "Hello, world!" << std::endl; ahBqYAK9
return 0; hp\&g2_S0W
} )9QtnM
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C++/CLI a?cJl
int main() / HTY>b
{ ZL MH~cc
System::Console::WriteLine("Hello, world!"); ' W/M>!X
} bOS)vt*V
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C# (C Sharp) bz>X~
class HelloWorldApp y8Va>ul"U
{ x0*{oP
public static void Main() e#eVc'=cDR
{ sV^:u^
System.Console.WriteLine("Hello, world!"); Y.tx$%
} '%)R}wgV
} [}RoZB&I
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tYS4"Nfb+
COBOL 4E'9;tA3l
IDENTIFICATION DIVISION. D:)Wr, 26
PROGRAM-ID. HELLO-WORLD. pl[J!d.c
=W(*0"RM
ENVIRONMENT DIVISION. bp1AN9~
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DATA DIVISION. ?GhyVXS y.
2|1fb-AR
PROCEDURE DIVISION. azcPeAe
DISPLAY "Hello, world!". s?SspuV
STOP RUN. 6|TSH$w_
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k3\N.@\
Common Lisp sdu?#O+c1
(format t "Hello world!~%") ~z,o):q1}
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L'e_?`!:
DOS批处理 /
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@echo off 4<s.|W`
echo "Hello, world!" X/!_>@`7?
g 7oY 1;
?J[3_!"t
Eiffel @Mk`Tl
class HELLO_WORLD E?m~DYnU
\P\Z<z7jy
creation L`NIYH<^
make h}b:-a
feature ``o]i{x
make is nHK(3Z4G
local LQ0/oYmNc
io:BASIC_IO `:/'")+@v
do 6(
HF)z
!!io >J"IN I
io.put_string("%N Hello, world!") Iq$| ?MH
end -- make {C1crp>q
end -- class HELLO_WORLD qTO6I5u
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Erlang 9hp&HL)BOa
-module(hello). %E?Srs}j
-export([hello_world/0]). _=v#"l
6r7>nU&d
hello_world() -> io:fwrite("Hello, World!\n"). {@Wv@H+4
@SQsEq+A?\
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Forth '3.\+^3
." Hello, world!" CR 'H1~Zhv
3^xUN|.F*V
4WT[(
Fortran 'C+cQLig@
WRITE(*,10) |OQ]F
10 FORMAT('Hello, World!') HR>Y?B{
STOP 4vhf!!1
END
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d\z6Ob"t
HTML *X5)9dq
<HTML> obb%@S`
<HEAD> PN*
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<TITLE> Hello World! </TITLE> 6Yai?*.Q
</HEAD> 0b&