“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。 UF!qp
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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》。 r&4Xf#QD6
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以下是用不同语言写成的Hello World程序的几个例子: 'r]6 GC8Z$
Ada Z8$BgP
with Ada.Text_Io; use Ada.Text_Io; (uvQ/!
procedure Hello is }( F:U#
begin 9Y.(xp &vw
Put_Line ("Hello, world!"); @\?ubF
end Hello; 5,gT|4|B\g
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汇编语言 $vu*# .w
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x86 CPU,DOS,TASM e&z@yy$
MODEL SMALL 0! 3. .5==
IDEAL T&'Jc
STACK 100H ?A|JKOst]
wPM>-F
DATASEG IQO|)53)
HW DB 'Hello, world!$' >g{&Qx`&
P_A@`eU0
CODESEG dzOco)y
MOV AX, @data 3LET zsJ
MOV DS, AX 2V)+ba|+
MOV DX, OFFSET HW VEh9N
MOV AH, 09H lwf4ke
INT 21H ^_ch%3}Im
MOV AX, 4C00H GFdbwn5B
INT 21H -fPiHKJ
END 3UUdJh<~
cOV9g)7^O
M)oKtiav*
x86 CPU,GNU/Linux,NASM 'd$RNqe
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ts,r,{
;Enter this into "hello.asm" then type: */M`KPW
;"nasm -f elf hello.asm" B%6cgm,
;"ld hello.o -o hello" Kz42AC
;"./hello" z='%NZY
0beP7}$
section .data ;data section declaration b~vV++ou_
msg db 'Hello World!',0AH Jo\MDyb]
len equ $-msg ;string length Z|E9}Il]
N 5*Qnb8
section .text ;code section declaration 4tCM2it%
global _start ;entry point (start of execution) a|z-EKV
_start: mov edx,len ;string length v]( Y n)#
mov ecx,msg ;string start eI$V2
mov ebx,1 ;file handle: stdout <9,h!
mov eax,4 ;sys_write MG vz-E1e
int 80h ;kernel system call )7*'r@
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mov ebx,0 ;return value $~6MR_Yq
mov eax,1 ;sys_exit 6HK1?
int 80h ;kernel system call )=Z;H"_
6
^3RfF^W
o`c+eMwr(
x86 CPU,Windows,MASM32 F~6]II
.386 @\&j3A
.model flat,stdcall $"vz>SuB
option casemap:none d2UidDU5qa
;Include 文件定义 #s c!H4
include windows.inc !*:g??[T
include user32.inc c7r(&h
includelib user32.lib 06]3+s{{
include kernel32.inc E'aOHSAg
includelib kernel32.lib X\Bl?
F
;数据段 .hmeP
MK
.data ^Q`5+
szCaption db 'A MessageBox!',0 aPelt`
szText db 'Hello,world!',0 gw"cXny
;代码段 L-w3A:jk
.code !s-A`}
s+
start: tG$O[f@U6
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ,RR{Y-
invoke ExitProcess,NULL A6=Z2i0w>X
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |,,#DSe
end start gttsxOgktH
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,}IcQu'O
AWK f`Fj-<v
BEGIN { print "Hello, world!" } Acw`ytV
k3$'K}=d
zj r($?
BASIC eV*QUjS~
传统版BASIC(例如GWBASIC): rtS cQ
,<L4tp+y0
10 PRINT "Hello, world!" r[!~~yu/o
20 END )58O9b
06&;GW!-
或在提示符输入: \]<R`YMV
/= ;,lC
?"Hello, world!":END [`GSc6j
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现代版BASIC(例如Quick BASIC): r[V%DU$dj
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Print "Hello, world!" VkJ">0k
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以下的语句在Quick BASIC中同样有效: 29J|eBvxx
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? "Hello,world!" 3q/Us0jr
l{7}3Am6
hn2:@^=f
BCPL {nmu(EP
GET "LIBHDR" G{: B'08
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LET START () BE _\d|`3RM
$( @FIL4sb
WRITES ("Hello, world!*N") =Oy& f:s
$) tM"vIz 05
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=7+%31
Befunge Oz%6y
ri
"!dlrow olleH">v ;t +p2i
, 9!jF$
^_@ I+
|uyc
%EU_OS(u.{
F8?,}5j
Brainfuck f0g/`j@Up
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< n@+?tYk*e
+++++++++++++++.>.+++.------.--------.>+.>. W\Pd:t
IB#
ua:
"m^gCN}c
C 7=N%$]DKZ
#include <stdio.h> YA@?L!F
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int main(void) l\
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{ 7kV$O(4
printf("Hello, world!\n"); oA5Qk3b:
return 0; 5b rM..
} Kc[^Pu
U=JK
GImPPF
C++ ^*l
dsc
#include <iostream> BaIpX<$T
E&J<qTH9
int main() G)~>d/
{ wm#(\dj
std::cout << "Hello, world!" << std::endl; #"6l+}
return 0; Ru`afjc
} 5P<"I["
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8US35t:M
C++/CLI ?&0CEfa?
int main() FMCA~N
{ W2XWb<QSEV
System::Console::WriteLine("Hello, world!"); :a Cf@:']
} yI8O#
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fASklcQ
C# (C Sharp) {s@!N
class HelloWorldApp Ydsnu
{ Ijiw`\;
public static void Main() 1^o})9
{ 2n>mISy+
System.Console.WriteLine("Hello, world!"); @{qcu\sZ
} H%n/;DW
} e;=R8i
l1zPL3"u_^
*H/)S 5
COBOL !Yo2P"
IDENTIFICATION DIVISION. _K?v^oM#
PROGRAM-ID. HELLO-WORLD. I;jH'._k#
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ENVIRONMENT DIVISION. :@&e~QP(
2A
DATA DIVISION. @8J*vY =e
X_-/j.
PROCEDURE DIVISION. IrRy1][Qr
DISPLAY "Hello, world!". T#rUbi>""
STOP RUN. &O+S[~
ZWyf.VJ
]gHrqi%
Common Lisp dj084q7
(format t "Hello world!~%") H)TKk%`7
$Rze[3
*RJD^hu
DOS批处理 A\ mSS
@echo off |oeg'T
echo "Hello, world!" UBv#z&@[
m6
M/G
g#{7qmM
Eiffel $n8&5<
class HELLO_WORLD Dp*:oMATx0
/FXb,)1t
creation T^8`ji
make ;(E]mbV'=
feature 1|
WDbk
make is D {E,XOi
local Xl$r720ZJr
io:BASIC_IO E\4ZUGy0
do uuHs)
!!io rr1,Ijh{D
io.put_string("%N Hello, world!") F'<XB~&o
end -- make 7zQGuGo(
end -- class HELLO_WORLD D@w&[IF
/FTP8XHwL)
(Ms #)E
Erlang meB9:w[m
-module(hello). "JF
-export([hello_world/0]). siuDg,uqK5
U>b.MIBX
hello_world() -> io:fwrite("Hello, World!\n"). <!W9EM
vG}\Amx+
sWA-_ 4
Forth 1iqgTi>
." Hello, world!" CR vEt=enQ
aQWg?,Ju6
5#_GuL%
Fortran V+'zuX
WRITE(*,10) !Y^B{bh
10 FORMAT('Hello, World!') bneP>Bd
STOP A{{rNbCK
END Z~
q="CA4
0n{+_
H5FWk
HTML S2I{?y&K
<HTML> >r:z`^p
<HEAD> k fOd|-
<TITLE> Hello World! </TITLE> F%ukT6xp
</HEAD> slA~k;K:_
<BODY> A9HgABhax
<p>Hello World!</p> (ia+N/$u
</BODY> ?6[u\V
</HTML>
e oFM
7m(9|Y:Q.
l>Zp#+I-
HQ9+ ->'q
H '}Jq(ah(
;M#D*<ucI:
g{?{N
INTERCAL !q+
%]k?x
PLEASE DO ,1 <- #13 Em<J{`k6
DO ,1 SUB #1 <- #238 5n2}|V$VqP
DO ,1 SUB #2 <- #112 a,t]> z95
DO ,1 SUB #3 <- #112 t(^Lh.<a
DO ,1 SUB #4 <- #0 {y!77>Q/
DO ,1 SUB #5 <- #64 rj eKG-Z@
DO ,1 SUB #6 <- #238 .GDY
J9vi
DO ,1 SUB #7 <- #26 DQ6pe)E|
DO ,1 SUB #8 <- #248 lt l(SIi
DO ,1 SUB #9 <- #168 =5p?4/4 J
DO ,1 SUB #10 <- #24 <~5$<L4
DO ,1 SUB #11 <- #16 |msQ
DO ,1 SUB #12 <- #158 dBL{Mbh2Z
DO ,1 SUB #13 <- #52 o[G,~f\-
PLEASE READ OUT ,1 P-N+
PLEASE GIVE UP IrP6Rxh
44h z,
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Java V,3$>4x
public class Hello 1B`0.M'd
{ HX:^:pF}
public static void main(String[] args) X%M*d%n b
{ nR?m,J
System.out.println("Hello, world!"); =Rf!i78c5
} %X\rP,
} f,0oCBLPO
sv>c)L}I
03y5$kQ
JSP %lK]m`(
<% 'q*/P&x5
out.print("Hello, world!"); Dmk~t="Y
%> ~gbq^
HuL9' M
L5>.ku=T
MIXAL gY@$g
TERM EQU 19 the MIX console device number ,OO0*%
ORIG 1000 start address z9*7fT
START OUT MSG(TERM) output data at address MSG JMYM}G
HLT halt execution cM+s)4TPL
MSG ALF "MIXAL" y$pT5X G
ALF " HELL" Ll6|Wh X
ALF "O WOR" G0$,H(]~
ALF "LD " D\GP+Ota
END START end of the program FBK6{rLMc
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Nuva tB{O6=q
<..直接输出..> LMte,zs>
Hello, world! a@WSIcX*W
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<..或者..> itIzs99j
5eSmyj-W
<. 9G}Crp
// 不带换行 J\kv}v
? "Hello, world!" xyTjK.N
[VwoZX:
// 或者 DW~< 8
;GxKPy
// 带换行 \lpR+zaF
?? 'Hello, world!' N)Z,/w9
.> U ()36
8U>f/dxLOO
H<YS2Ed
OCaml O>`DR0
let main () = 8CKI9
print_endline "Hello world!";; 7[W!Nx
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Li_ a|dI
Pascal 6muZE1sn
program Hello; g&V1<n\b+
begin <}$o=>'
writeln('Hello, world!'); 8wqHr@}p
end. sP5\R#
M7;P)da
ajz%3/R
Perl &iD