“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。 vR]mSX3)?
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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》。 dERc}oAh(
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以下是用不同语言写成的Hello World程序的几个例子: F 1}
Ada 'TX M{RGw
with Ada.Text_Io; use Ada.Text_Io; .xpmp6-
procedure Hello is EUwQIA2c8N
begin r'd/qnd
Put_Line ("Hello, world!"); }[,3yfiX
end Hello; R`Qpd3
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汇编语言 ]_2yiKv&
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x86 CPU,DOS,TASM /J;]u3e|
MODEL SMALL k!13=Gh
IDEAL fq Y1ggL
STACK 100H p\+6"28{_~
pF='jj51
DATASEG pbdF]>\
HW DB 'Hello, world!$' 8_iHVc;<
t F/nah
CODESEG .&(8(C
MOV AX, @data 4e/cqN6
MOV DS, AX 2v\W1VF
MOV DX, OFFSET HW 9Dq.lr^
MOV AH, 09H (C~dkR?
INT 21H (rMZ
MOV AX, 4C00H 2f`xHI/@fj
INT 21H `Qq/F]
END -kc(u1!
AP
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x86 CPU,GNU/Linux,NASM T?e9eYwS
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). k5s ?lWH
;Enter this into "hello.asm" then type: Nu+wL>t
;"nasm -f elf hello.asm" F '#^`G9
;"ld hello.o -o hello" `
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;"./hello" (txt8q
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section .data ;data section declaration 'Q`C[*c
msg db 'Hello World!',0AH X X&K=<,Ja
len equ $-msg ;string length m >hovikY*
-eq=4N=s
section .text ;code section declaration uWrFunh%
global _start ;entry point (start of execution) }s6G!v^2""
_start: mov edx,len ;string length ;/aB)JZ5=
mov ecx,msg ;string start +3HPA#A
mov ebx,1 ;file handle: stdout Gt5$6>A
mov eax,4 ;sys_write @tQ2E}psP,
int 80h ;kernel system call +_-Y`O!Q
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mov ebx,0 ;return value 2*YP"Ryh
mov eax,1 ;sys_exit \6 LcV ik
int 80h ;kernel system call {9'hOi50
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x86 CPU,Windows,MASM32 2mq%|VG'
.386 QqjTLuN
.model flat,stdcall ?N2X)Y@yi
option casemap:none :o<N!*pT
;Include 文件定义 H8<m9zDvl
include windows.inc 7 BK46x
include user32.inc 776 nWw)
includelib user32.lib !*8#jy
include kernel32.inc J5-rp|
includelib kernel32.lib 3z$HKG
;数据段 /evaTQPz
.data #Wq#beBb
szCaption db 'A MessageBox!',0
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szText db 'Hello,world!',0 3f,u}1npa*
;代码段
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.code 4UazD_`'
start: -g<cinNSp
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK tnNZ`]qY
invoke ExitProcess,NULL Lv^a+'
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> =E;
#OZO
end start -P*xyI
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AWK 1=ip,D
BEGIN { print "Hello, world!" } sD.6"w7}
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BASIC B'!PJj
传统版BASIC(例如GWBASIC): G+fd.~aGE
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10 PRINT "Hello, world!" ~X[S<Gi#
20 END jJ*=Ghu-
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或在提示符输入: u8xk]:%
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?"Hello, world!":END FE>3 D1\
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现代版BASIC(例如Quick BASIC): U~Xf= f_Q$
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Print "Hello, world!" )< l\jfx e
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以下的语句在Quick BASIC中同样有效: FSFFk~
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? "Hello,world!" 6/VNuQ_#
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BCPL 9y;y7i{>?
GET "LIBHDR" xp~YIeSg
#i@ACAgn;6
LET START () BE otoBb^Mz
$( Q;=6ag'
WRITES ("Hello, world!*N") #`r(zI[
$) +_P8'e%Iy
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Befunge n#)PvV~
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0
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Brainfuck 4n#YDZ
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< G]1(X38[si
+++++++++++++++.>.+++.------.--------.>+.>. r(pwOOx
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C p| Vmdnb
#include <stdio.h> ;HR 6X
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int main(void) te4F"SEf
{ fFjL pl
printf("Hello, world!\n"); U0!^m1U:
return 0; 0`V3s]%iu
} .MzOLv
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C++ 44Q6vb?
#include <iostream> Gv!BB=ir(
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int main() |if~i;VKL
{ w:ORmR.p
std::cout << "Hello, world!" << std::endl; KuIBYaK,
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return 0; N[#iT&@T}/
} pk;ff q@
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C++/CLI fEx+gQW_
int main() hN Z4v/
{ vsu@PuqH
System::Console::WriteLine("Hello, world!"); R.91v4J
} Y')O>C0~
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C# (C Sharp) YtV |e|aD
class HelloWorldApp i,mrMi
c#
{
#;5[('&[
public static void Main() #> 7')G
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System.Console.WriteLine("Hello, world!"); !w @1!Xpn1
} =Jsg{vI
} <$RS*n
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COBOL N$N;Sw
IDENTIFICATION DIVISION. 5%2ef{T[
PROGRAM-ID. HELLO-WORLD. "Czz,;0
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ENVIRONMENT DIVISION. 73'U#@g6
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DATA DIVISION. X{5v?4wI
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PROCEDURE DIVISION. #[gcg]6c
DISPLAY "Hello, world!". WF+bN#YJ
STOP RUN. ~C}(\8g
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3g?MEM~
Common Lisp ${jA+L<J
(format t "Hello world!~%") B, QC-Tn
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DOS批处理 V-?sek{;
@echo off R=][>\7]}
echo "Hello, world!" nu\
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Eiffel s|{^ }4{
class HELLO_WORLD n;-x!Gs
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creation K$Mx}m7l
make ^BF@j4*~
feature %f_)<NP9=
make is O0K@M
local |% M{kA-
io:BASIC_IO U6/m_`nc
do 1Y H4a|bc
!!io H$k![K6Uj
io.put_string("%N Hello, world!") y9V;IXhDc
end -- make syWv'Y[k?
end -- class HELLO_WORLD ;a!h.8UJPI
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Erlang (5f5P84x
-module(hello). t7U,AQ=;P5
-export([hello_world/0]). 4=?Ok":8
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hello_world() -> io:fwrite("Hello, World!\n"). 8I5 VrT
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Forth E]HND.`*>
." Hello, world!" CR [I+)Ak5
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Fortran >6.[i@RmWU
WRITE(*,10) o+if%3
10 FORMAT('Hello, World!') 4e(9@OLP
STOP $>S}acuC
END C*W.9
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HTML 'gk81@|
<HTML> zJy 89ib'
<HEAD> h+zkVRyA
<TITLE> Hello World! </TITLE> v$.JmL0^J
</HEAD> "lv:hz
<BODY> 94qHY1rp
<p>Hello World!</p> brYYuN|Vc
</BODY> J^s<