“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。 o.(Gja4
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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》。
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以下是用不同语言写成的Hello World程序的几个例子:
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Ada Nq1YFI>W
with Ada.Text_Io; use Ada.Text_Io; ,P%i%YPj
procedure Hello is hP}-yW6]
begin 5zOC zm
Put_Line ("Hello, world!"); 3_8W5J3I
end Hello; i.{.koH<
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汇编语言 vNju|=Lo
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x86 CPU,DOS,TASM Gk
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MODEL SMALL $]rC-K:Z
IDEAL NQA2usb
STACK 100H Xk!wT2;
\-SC-c
DATASEG %C_c%3d
HW DB 'Hello, world!$' 9/_~YY=/h
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!=
CODESEG nk;^sq4M:
MOV AX, @data iBwM]Eyv.
MOV DS, AX r
uIgo B
MOV DX, OFFSET HW J9MAnYd)i
MOV AH, 09H Ym.{
{^=
INT 21H {eVv%sbq
MOV AX, 4C00H gJ~CD1`O
INT 21H #r/5!*3
END @_wJN Qo`
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x86 CPU,GNU/Linux,NASM [^W
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). G[6i\Et
;Enter this into "hello.asm" then type: 7Ck3L6J#
;"nasm -f elf hello.asm" KcUR
/o5K
;"ld hello.o -o hello" X]o"4#CQIX
;"./hello" %CrTO(
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section .data ;data section declaration n5z|@I`S_
msg db 'Hello World!',0AH 5WvsS(
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len equ $-msg ;string length )7p(htCz5
^#IE
t#
section .text ;code section declaration jYvl-2A'
global _start ;entry point (start of execution) Z1Qv>@u
_start: mov edx,len ;string length K>C@oE[W
mov ecx,msg ;string start DIfQ~O+u
mov ebx,1 ;file handle: stdout GG"6O_
mov eax,4 ;sys_write 2x<!>B
int 80h ;kernel system call Fy0sn|
L6#4A3yh
mov ebx,0 ;return value 0wCQPvO
mov eax,1 ;sys_exit |3^U\r^zo
int 80h ;kernel system call A!Tm[oqu
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g( xu
x86 CPU,Windows,MASM32 mZM,"Wq,
.386 CI-1>= "OE
.model flat,stdcall s4QCun~m
option casemap:none )%PMDG|
;Include 文件定义 {pA&Q{ ^
include windows.inc
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include user32.inc 3@:O1i
includelib user32.lib MkhD*\D
/
include kernel32.inc )+DDIq
includelib kernel32.lib -2(?O`tZ
;数据段 IMBjI#\
.data R1/c@HQw?
szCaption db 'A MessageBox!',0 o)>iHzR</
szText db 'Hello,world!',0 i"xV=.
;代码段 ,FXc_BCx4
.code 7XLqP
start: rxqSi0p
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK .6C6ZUB;
invoke ExitProcess,NULL 8&nb@l
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 3,K\ZUU.,
end start A7,%'.k
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AWK ; O(M l }z
BEGIN { print "Hello, world!" } bt(Y@3;
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BASIC c*]f#yr?
传统版BASIC(例如GWBASIC): g cB
hEw
^b|I^TN0
10 PRINT "Hello, world!" 5423Ky<
20 END ijUu{PG`X
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或在提示符输入: <h;_:
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?"Hello, world!":END rS+) )!
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现代版BASIC(例如Quick BASIC): .6LRg
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Print "Hello, world!" >MSK.SNh
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以下的语句在Quick BASIC中同样有效: \*'@F+
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? "Hello,world!" O!^ >YvOh
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BCPL K~2sX>l
GET "LIBHDR" j*[P\Cm
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LET START () BE (z.n9lkfi
$( ZNM9@;7
WRITES ("Hello, world!*N") G;iH.rCH
$) TET=>6
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Befunge _x1W\#
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Brainfuck 3 o$zT9j
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< vd(S&&]o1
+++++++++++++++.>.+++.------.--------.>+.>. _p5#`-%mM
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C ~*"ZF-c,
#include <stdio.h> C:}1r
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int main(void) RgUQ:
{ ~[dL:=?c
printf("Hello, world!\n"); }A,!|m4
return 0; KvEv0L<ky
} 7s3=Fa:9Q
c"-X:m"
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C++ L+p}%!g
#include <iostream> Q{?\qCrrYl
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int main() ZSwuEX
{ {9-9!jN{"
std::cout << "Hello, world!" << std::endl; A%?c1`ZxF
return 0; 4x(m.u@
} z-b78A/8
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C++/CLI R`E:`t4G
int main() -j]c(Q MA]
{ WeaT42*Q{
System::Console::WriteLine("Hello, world!"); H#D:'B j29
} ,zr9* t
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C# (C Sharp) yj#FO'UY
class HelloWorldApp ZS4dW_*[
{ )B"{B1(
public static void Main() 2uN3:_w
{ DbLo{mFEIj
System.Console.WriteLine("Hello, world!"); dO%f ;m>#
} R!QR@*N
} H"(#Tp ZTE
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X-fWdoN @-
COBOL 8s2y!pn7Q
IDENTIFICATION DIVISION. U5wh( vi
PROGRAM-ID. HELLO-WORLD. O/FI>RT\H
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ENVIRONMENT DIVISION. :wXiz`VH
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DATA DIVISION. 6H:
fg
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PROCEDURE DIVISION. >
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DISPLAY "Hello, world!". q[W6I9
STOP RUN. Khi;2{`
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Common Lisp ui,!_O .c
(format t "Hello world!~%")
%G\nl
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2t_g\Q
DOS批处理 l+>Y
@echo off !;h&@LXG(
echo "Hello, world!" {l!{b1KJ
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Eiffel 6xtgnl#T
class HELLO_WORLD uA[
:
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creation ^.iRU'{
make RV_I&HD!
feature \V!{z;.fA
make is k<Gmb~Tg1
local AVw oOvJ
io:BASIC_IO gBhX=2%
do GvG8s6IZ
!!io L~{(9J'(
io.put_string("%N Hello, world!") MXfyj5K
end -- make ;lb
end -- class HELLO_WORLD PNo:[9`S;m
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Erlang 2^
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-module(hello). CN ( :
-export([hello_world/0]). XXn3K BIf
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hello_world() -> io:fwrite("Hello, World!\n"). T=u"y;&L
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Forth ; 8DtnnE
." Hello, world!" CR 7r'_p$
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Fortran ,M?8s2?
WRITE(*,10) u8KQV7E
10 FORMAT('Hello, World!') ^
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STOP LH_H
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END IMbF]6%p(
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HTML 0j4n11#
<HTML> A|1xK90^XT
<HEAD> KCbJ^Rln
<TITLE> Hello World! </TITLE> =,;$d*h
</HEAD> frPQi{u$
<BODY> Z3c\}HLY
<p>Hello World!</p> #`gX(C>
</BODY> ~K #92
</HTML> As>Og
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INTERCAL 7L&,Na
PLEASE DO ,1 <- #13 /{hT3ncb
DO ,1 SUB #1 <- #238 [<U=)!Swg
DO ,1 SUB #2 <- #112 y
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DO ,1 SUB #3 <- #112 :Bt,.uNC
DO ,1 SUB #4 <- #0 W[DoQ @q
DO ,1 SUB #5 <- #64 1aS:bFi`
DO ,1 SUB #6 <- #238 ~A5NseWCK
DO ,1 SUB #7 <- #26 WgR%mm^
DO ,1 SUB #8 <- #248 @fmp2!?6
DO ,1 SUB #9 <- #168 i0wBZ i?
DO ,1 SUB #10 <- #24 @d~]3T
DO ,1 SUB #11 <- #16 /cx'(AT
DO ,1 SUB #12 <- #158 u9v,B$S
DO ,1 SUB #13 <- #52 *bYU=RS
PLEASE READ OUT ,1 2>^(&95M
PLEASE GIVE UP ]5QXiF8`
^_\m@
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Java VT4>6u}
public class Hello 0_ST2I"Ln
{ \.i ejB
public static void main(String[] args) qS! Lt3+
{ ~=c5q
System.out.println("Hello, world!"); bws}'#-*
} zE1=P/N
} iR9duP+
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JSP 24 [cU
<% u? >x
out.print("Hello, world!"); cSB_b.@"1
%> r vq{Dfo=
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MIXAL qvo!nr7
TERM EQU 19 the MIX console device number HxW/t7Z(
ORIG 1000 start address (_FeX22+
START OUT MSG(TERM) output data at address MSG RAu(FJ
HLT halt execution 6(7{|iY
MSG ALF "MIXAL" Q~ Ad{yC
ALF " HELL" hG~.Sc:G
ALF "O WOR" -a>CF^tH
ALF "LD " LNR1YC1c
END START end of the program (D?4*9=
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Nuva "{E%Y*
<..直接输出..> +924_,zF
Hello, world! Z]{=Jy!F
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<..或者..> {g[kn^|
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<. |P&
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// 不带换行 f,6V#,
? "Hello, world!" <>$CYTb
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// 或者 O86p]Lr
`?[,1
// 带换行 p ]jLs|tat
?? 'Hello, world!' n05GM.|*s
.> qTbc?S46pt
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j~.tyxOq#
OCaml 0S>L0qp
let main () = |BhL.
print_endline "Hello world!";; /CyFe<