“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。 ]\rQ{No
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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》。 qb;b.P?~D$
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以下是用不同语言写成的Hello World程序的几个例子: >K'dgJ245
Ada o_}?aI~H
with Ada.Text_Io; use Ada.Text_Io; %e[E@H 7
procedure Hello is B9,39rG/7+
begin jwjLxt
Put_Line ("Hello, world!"); ;HCK iHC
end Hello; -~c-mt
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m$C1Ea-wnT
汇编语言 </kuJh\
*ELU">!}G
x86 CPU,DOS,TASM j=pg5T
MODEL SMALL K Zg NL|
IDEAL O)W+rmToI
STACK 100H t<dFH}U`w
XZN@hXc9:v
DATASEG :2KPvp7?
HW DB 'Hello, world!$' i+(>w'=m
kMW9UUw
CODESEG f:46.)Wj<
MOV AX, @data [4xZy5V
MOV DS, AX "'t f]s
MOV DX, OFFSET HW ,|z@Dy
MOV AH, 09H 8Vz!zYl
INT 21H @_t=0Rc
MOV AX, 4C00H n;Mk\*Cg
INT 21H 4"|3pMr
END T}{zh
oAifM1*0
onmpMU7w
x86 CPU,GNU/Linux,NASM aoz+T h3
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). _<]0hC
;Enter this into "hello.asm" then type: HPu+ 4xQV
;"nasm -f elf hello.asm" &~;M16XM,e
;"ld hello.o -o hello" +-b'+mF
;"./hello" #do%u"q
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section .data ;data section declaration |11vm#
msg db 'Hello World!',0AH ^>%.l'1/(
len equ $-msg ;string length I~6(>Z{
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section .text ;code section declaration #*rJI3
global _start ;entry point (start of execution) #yIHr&'oX
_start: mov edx,len ;string length u ]y[g
mov ecx,msg ;string start ^O<'Qp,[:
mov ebx,1 ;file handle: stdout ogSDV
mov eax,4 ;sys_write =p5]r:9W
int 80h ;kernel system call t]Ln(r
1.u^shc&|
mov ebx,0 ;return value UUDbOxD^w
mov eax,1 ;sys_exit #qk=R7"Q
int 80h ;kernel system call /":/DwI'
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x86 CPU,Windows,MASM32 Q_p&~ PNy5
.386
6p@[U>`
.model flat,stdcall n CwA8AG
option casemap:none =c 9nC;C
;Include 文件定义 vn*K\,
include windows.inc J|hVD
include user32.inc ELV~
ayp5
includelib user32.lib wZ0bD&B
include kernel32.inc a~@f,bw
includelib kernel32.lib w:nH_x#C4
;数据段 p&$PsgR
.data Ohgu*5!o
szCaption db 'A MessageBox!',0 oMemF3M
szText db 'Hello,world!',0 PSv 5tQhm
;代码段 (;=|2N>7
.code "*/IP9?]
start: IR]5,K^l
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK dh%O {t
invoke ExitProcess,NULL >Q<XyAH~
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> BPkL3Ev1V
end start b&@]f2/
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AWK %}H
2
BEGIN { print "Hello, world!" } 6:S,
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BASIC (e5Z^9X
传统版BASIC(例如GWBASIC): T^MY w
wbOYtN Y@
10 PRINT "Hello, world!" lvODhoT
20 END ugXDnM[S%
'\d
ldg#P
或在提示符输入:
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0\"#Xa+}8
?"Hello, world!":END .7
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现代版BASIC(例如Quick BASIC): pam9wfP
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Print "Hello, world!" iku*\,6W
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以下的语句在Quick BASIC中同样有效: CG@Fn\J
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? "Hello,world!" 4 a&8G
XXX y*/P
l d#x'/
BCPL M]k Q{(
GET "LIBHDR" xMQ>,nZ
At[Q0'jkc
LET START () BE |*w)]2Bl
$( rZ+4kf6S
WRITES ("Hello, world!*N")
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Befunge k7@QFw4 j
"!dlrow olleH">v ]=ApYg7!
, Dz$w6d
^_@ LKI\(%ba#
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Brainfuck S'$m3,l(k
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< *7Y#G8 s
+++++++++++++++.>.+++.------.--------.>+.>. "8uNa
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C {R63n
#include <stdio.h> ny+r>>3Td
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int main(void) MYb^G\K
{ S?`0,F
printf("Hello, world!\n"); r)-{~JA!
return 0; Jb$G
} f^hJA Z
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C++ #r"|%nOfY
#include <iostream> h4KMhr
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int main() -,;woOG
{ gQSVPbzK
std::cout << "Hello, world!" << std::endl; aB (pdW4
return 0; 2`;XcY4A
} 1}c/l<d
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aqk$4IG
C++/CLI a%HNz_ro
int main() b"#S92R+
{ s&o9LdL
System::Console::WriteLine("Hello, world!"); I:oEt
} 3'6 UvAXFH
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C# (C Sharp) d>I)_05t
class HelloWorldApp NTZ3Np`
{ w+j\Py_G"
public static void Main() 2.Ww(`swL
{ <G<5)$
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System.Console.WriteLine("Hello, world!"); u SI@Cjp
} Hci>q`p#
} iNl<<0a
3 ;F
F[O147&C
COBOL ,)d`_AD+5
IDENTIFICATION DIVISION. ";&PtLe
PROGRAM-ID. HELLO-WORLD. YwY?tOxBe
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ENVIRONMENT DIVISION. Z/: yYSq
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DATA DIVISION. W\Sc ak>
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PROCEDURE DIVISION. <4;,
y*"n
DISPLAY "Hello, world!". bp?TO]LH
STOP RUN. KK>jV
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^
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Common Lisp i83Jy w,f
(format t "Hello world!~%") Nlm}'Xt
lU=VCuW!
Jpp-3i.F#
DOS批处理 '>1M~B
@echo off D2D+S
echo "Hello, world!" MD1X1,fk
!WGQ34R {
paN=I=:*M
Eiffel mMZrBz7r
class HELLO_WORLD FdnLxw
[bo"!Qk%
creation 3l`"(5
make cy
mC?8<
feature .Xf_U.h$*@
make is )$f?v22
local *UW 8|\;
io:BASIC_IO BH^*K/^
do $,r%@'= &
!!io 0)h.[O8@>
io.put_string("%N Hello, world!") {U3jJ#K
end -- make \pK&gdw
end -- class HELLO_WORLD xo @|;Z>&F
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Erlang H*0g*(
-module(hello). CiHx.5TiC
-export([hello_world/0]). #WG;p(?:
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hello_world() -> io:fwrite("Hello, World!\n"). D1>*ml
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7u^wO<
Forth bL0]Yuh
." Hello, world!" CR ~MB)}!S:
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Fortran
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WRITE(*,10) |SMigSu r`
10 FORMAT('Hello, World!') #>_fYjT
STOP h V`?,
~K
END hF^JSCDz l
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;XZN0A2
HTML B$JPE7h@[P
<HTML> Q2)5A&U\
<HEAD> XZ$g~r
<TITLE> Hello World! </TITLE> Dqwd=$2%
</HEAD> sP@XV/`3L6
<BODY> 8aRmHy"9l
<p>Hello World!</p> }mZCQJ#`
</BODY> ^_G#JJ\@$
</HTML> &"tQpw5
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}*-fh$QJ
HQ9+ CP"5E?dcK
H GpXf).a@
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dE[X6$H[
INTERCAL >yVrIko
PLEASE DO ,1 <- #13 ^56D)A=
DO ,1 SUB #1 <- #238 3#udzC
DO ,1 SUB #2 <- #112 d1^5r
31
DO ,1 SUB #3 <- #112 ^"/TWl>jB
DO ,1 SUB #4 <- #0 *CF80DJ
DO ,1 SUB #5 <- #64 H|?r_Ns
DO ,1 SUB #6 <- #238 F [-D
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DO ,1 SUB #7 <- #26 ?_ uan
DO ,1 SUB #8 <- #248 @c8RlW/A
DO ,1 SUB #9 <- #168 AoxORPp'
DO ,1 SUB #10 <- #24 %O(W;O
DO ,1 SUB #11 <- #16 "AMw o(Yi
DO ,1 SUB #12 <- #158 E:\#Ur2
DO ,1 SUB #13 <- #52 >c:nr&yP
PLEASE READ OUT ,1 F!C<^q~!
PLEASE GIVE UP Op9+5]XF
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Java ~k
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public class Hello Ug gg!zA
{ id`9,IJx
public static void main(String[] args) V~o'L#a
{ #gf0*:p
System.out.println("Hello, world!"); :N<o<