“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。
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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》。 y{2\T
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以下是用不同语言写成的Hello World程序的几个例子: 4gZ)9ya
Ada PbFbihg
with Ada.Text_Io; use Ada.Text_Io; ;te( {u+
procedure Hello is 8Wgzca
Q*
begin /T+%q#4
Put_Line ("Hello, world!"); )TEod!]
end Hello; >E3-/)Ti
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uPE Ab2u="
汇编语言 p{+F{e
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x86 CPU,DOS,TASM 5&xbGEP$
MODEL SMALL ZD4aT1|Q7
IDEAL x+b.9f4xJ
STACK 100H + WT?p]
VCwC$ts
DATASEG l gZ9*@d
HW DB 'Hello, world!$' *X^C+F
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CODESEG x,|fblQz
MOV AX, @data trB-(B%5
MOV DS, AX C_yNSD
MOV DX, OFFSET HW oDayfyy4y)
MOV AH, 09H .&I!2F
INT 21H b_7LSp
MOV AX, 4C00H ~(B%E'
INT 21H "=LeHY=9
END KtArV
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MhJA8|B6|
x86 CPU,GNU/Linux,NASM 5sNN:m
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ?bg
/%o
;Enter this into "hello.asm" then type: `g4N]<@z
;"nasm -f elf hello.asm" ^Cvt^cI
;"ld hello.o -o hello" yXqC
;"./hello" XVb9)a
L-9;"]d~|
section .data ;data section declaration 3Tp8t6*nL
msg db 'Hello World!',0AH y]+[o1]-c
len equ $-msg ;string length {fjBa,o
#
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section .text ;code section declaration KZa6*,,s
global _start ;entry point (start of execution) (!qfd
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_start: mov edx,len ;string length C6h[L
mov ecx,msg ;string start :qzhkKu
mov ebx,1 ;file handle: stdout Q)lD2
mov eax,4 ;sys_write _dW#[TCF
int 80h ;kernel system call #{#k;va
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mov ebx,0 ;return value e/#6qCE
mov eax,1 ;sys_exit 1$`|$V1
int 80h ;kernel system call L\5:od[EP
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x86 CPU,Windows,MASM32 rY8(`a
.386 ZkO2*;
.model flat,stdcall ?M6)O?[
option casemap:none f(5;Rf(
;Include 文件定义 esq~Ehr=
include windows.inc BOP7@ D
include user32.inc RLzqpE<rJ
includelib user32.lib
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include kernel32.inc V?mk*CU
includelib kernel32.lib -]{
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;数据段 \(;u[
.data D,|TQQ
szCaption db 'A MessageBox!',0 uH,/S4?X
szText db 'Hello,world!',0 R(,m!
;代码段 4'`H H
.code (`4&Y-
start: L3'isaz&^
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK xg 8R>j
invoke ExitProcess,NULL :RwURv+kT
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> hwQ|'^(@O
end start ]6s/y
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BEGIN { print "Hello, world!" } eVB43]g
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BASIC :(.:bf
传统版BASIC(例如GWBASIC): 9a_UxF+6/
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>
10 PRINT "Hello, world!" ^)a:DKL
20 END -B!
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或在提示符输入: >n(dyU @
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?"Hello, world!":END TTbJ9O<43
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现代版BASIC(例如Quick BASIC): ' o*\N%
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Print "Hello, world!" QMmZvz\^
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以下的语句在Quick BASIC中同样有效: 'tcve2Tt
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? "Hello,world!" @<X[,Mj
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BCPL A$n.'*gK
GET "LIBHDR" !q$>6P
fe"w--v
LET START () BE -3wid1SOm
$( g_k95k3V'
WRITES ("Hello, world!*N") b'`XFB#V
$) m7RyFnR2
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x\yr~$}(J
Befunge ;]=@;? 9
"!dlrow olleH">v JUXBMYFus
, !0|&f>y
^_@ L<XX?I\p
[+#k+*1*o
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Brainfuck wZbT*rU
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< u$aN~6HG
+++++++++++++++.>.+++.------.--------.>+.>. SG&H^V8
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C `[XH=-p
#include <stdio.h> 0;,Y_61
;=E}PbZt2
int main(void) fA0wQz]u
{ 4>H0a
printf("Hello, world!\n"); U3v~R4
return 0; X56q,jCJ{
} &gJ@"`r4
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w)1SZ}
C++ zlTLp-^Y
#include <iostream> B|+%ExT7
;~WoJlEK3
int main() 7}~nQl2
{ .x/H2r'1
std::cout << "Hello, world!" << std::endl; !vc5NKv#n
return 0; ~k?t
} ;05lwP*r]
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C++/CLI xB?!nd
int main() @{Fa=".Ch
{ l&"bm C:xr
System::Console::WriteLine("Hello, world!"); v&%W*M0q@
} xdY'i0fh
-;RAW1]}Y$
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C# (C Sharp) d{(Rs.GuP
class HelloWorldApp ;- Vs|X
{ hp}rCy|01
public static void Main() {!{T,_ J
{ /X#OX8gb]
System.Console.WriteLine("Hello, world!"); I\rjw$V#
} 9ao?\]&t
} f(K1,L:&7
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p;R&h4H
COBOL {l_D+B;
IDENTIFICATION DIVISION. ;eO Ye3;c
PROGRAM-ID. HELLO-WORLD. gh"_,ZhZt
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ENVIRONMENT DIVISION. ?Iaqbt%2
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DATA DIVISION.
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XuZgyt"=r
PROCEDURE DIVISION. >s,*=a
DISPLAY "Hello, world!". Pl#u,Y
STOP RUN. L=s8em]7l
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Common Lisp NA/Sv"7om
(format t "Hello world!~%") 3=UufI
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DOS批处理 "/UPq6
@echo off M$f_I +
echo "Hello, world!" rfZg
^BI&-bR@
9+5F(pd(
Eiffel c]z^(:_>
class HELLO_WORLD 0&r}'f?
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creation =U:]x'g(
make CaoQPb*
feature &;GoCU Le
make is
S=~+e{
local T).}~i;!
io:BASIC_IO |Z Cv>8?n
do P5"B7>L:
!!io #}Ays#wA>?
io.put_string("%N Hello, world!") wc~ 9zh
end -- make E!I4I'
end -- class HELLO_WORLD .Dr7YquW
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Erlang DAEWa
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-module(hello). e+@.n
-export([hello_world/0]). 7bJM
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hello_world() -> io:fwrite("Hello, World!\n"). kaDn=
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: R8+jO
&N%-.&t'
Forth 2fPMZ7Zd3
." Hello, world!" CR `0{qfms
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/`O'eH
Fortran 5=4-IO6W[]
WRITE(*,10) J=n^&y
10 FORMAT('Hello, World!') sn@)L ~$V
STOP g|!=@9[dv
END icK U)
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\OK}DhY#
HTML PKs$Q=Ol<|
<HTML> ({!*&DVu
<HEAD> |txzIc.#
<TITLE> Hello World! </TITLE> }yCgd 5+_
</HEAD> uuCVI2|
<BODY> ,l\D@<F
<p>Hello World!</p> M49Hm[0(
</BODY> VC!g,LU|-
</HTML> b1ZHfe:
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CR|>?9V
HQ9+ `R$bx 64
H O}7aX '
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INTERCAL TR{dNO!q
PLEASE DO ,1 <- #13 ayA_[{j%X
DO ,1 SUB #1 <- #238 :!,.c$M
DO ,1 SUB #2 <- #112 bW'Y8ok[v
DO ,1 SUB #3 <- #112 6M8(KN^
DO ,1 SUB #4 <- #0 -%t8a42
DO ,1 SUB #5 <- #64 -ktYS(8&
DO ,1 SUB #6 <- #238 WxF@'kdn*,
DO ,1 SUB #7 <- #26 T9'5V@
DO ,1 SUB #8 <- #248 %,) Xi
DO ,1 SUB #9 <- #168
q0\$wI
DO ,1 SUB #10 <- #24 9Mv4=k^7|4
DO ,1 SUB #11 <- #16 q{)Q ?E
DO ,1 SUB #12 <- #158 %E2C4UbY
DO ,1 SUB #13 <- #52 .>(qZEF
PLEASE READ OUT ,1 E95VR?nUg
PLEASE GIVE UP ] m^ECA$
rX&?Xi1JeV
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Java ' }NH$ KA
public class Hello WJ]g7!Ks
{ 2{#=Ygb0
public static void main(String[] args) Aj=c,]2
{ HSk}09GV
System.out.println("Hello, world!"); !E\J`K0_e
} \Ng[lN
} RjX#pb
9}Zi_xK&|e
gH/k}M7tA#
JSP ymyk.#Z<%
<% {pB9T3ry]
out.print("Hello, world!"); Bk~M ^AK@~
%> HLM"dmI
{{_,YO^w
:~9F/Jx
MIXAL q0
8
TERM EQU 19 the MIX console device number YcBAW4B`
ORIG 1000 start address &Lgi
START OUT MSG(TERM) output data at address MSG J)Td'iT(
HLT halt execution Rd*/J~TK
MSG ALF "MIXAL" ZpY"P6
ALF " HELL" y<5xlN(+v
ALF "O WOR" YY<e]CriU
ALF "LD " 9Uh nr]J.
END START end of the program :YZMRJL
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<..直接输出..> K&noA
Hello, world! Zx]"2U#
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<..或者..> !xK`:[B
^UK6q2[
<. nEm+cHHo?
// 不带换行 vd<"
G}
? "Hello, world!" Ws`P(WHm
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// 或者 }KHdlhD
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// 带换行 W;C41>^?/
?? 'Hello, world!' `4 A%BKYB
.> KmkPq]
),)]gw71QW
[e'Ts#($A
OCaml f/qG:yTV`
let main () = Sf\mg4,
print_endline "Hello world!";; oa|nQ`[
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Pascal p`JD8c
program Hello; VscEdtkd
begin lU.@! rGbw
writeln('Hello, world!'); 6^.<