“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。 'J}lnt[V
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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》。 vs+N{ V
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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 /e}k7U,^
with Ada.Text_Io; use Ada.Text_Io;
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procedure Hello is w}iflAnjq
begin Wo&i)S<i0F
Put_Line ("Hello, world!"); x=k$^V~
end Hello; Dqki}k~{
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9I9)5`d|Jn
汇编语言 ^VQiq7 xm
r*Mm5QozA
x86 CPU,DOS,TASM n(L {2r
MODEL SMALL ^,3 >}PU
IDEAL f'
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STACK 100H .s+e
hZ
K vgZx(.
DATASEG =o {`vv
HW DB 'Hello, world!$' j>U.(K
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CODESEG pT
<H&
MOV AX, @data U!h!z`RU54
MOV DS, AX /Wa+mp
MOV DX, OFFSET HW 5HB4B <2
MOV AH, 09H `JC!uc
INT 21H S"dQ@r9
MOV AX, 4C00H C9fJLCufC
INT 21H 3jQ
|C=
END nv={.H
Rj8l]m6U9
uzS57 O%
x86 CPU,GNU/Linux,NASM 9X-DR
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). eK`tFs,u
;Enter this into "hello.asm" then type: = #`FXO1C
;"nasm -f elf hello.asm" :c\NBKHv*
;"ld hello.o -o hello" ',.Xn`c
;"./hello" ."2V:;;
~DSle 3
section .data ;data section declaration
,{%[/#~6
msg db 'Hello World!',0AH @{bf]Oc
len equ $-msg ;string length !"wIb.j}0
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section .text ;code section declaration wL{Qni3A
global _start ;entry point (start of execution) 4B|f}7%\
_start: mov edx,len ;string length )_BteLo-
mov ecx,msg ;string start ?VJ Fp^Ra
mov ebx,1 ;file handle: stdout NIgt"o[I
mov eax,4 ;sys_write giPyo"SD
int 80h ;kernel system call ow&R~_
vt1!|2{
h
mov ebx,0 ;return value d"V^^I)yx&
mov eax,1 ;sys_exit I;No++N0
int 80h ;kernel system call 3[c54S+(U
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x86 CPU,Windows,MASM32 g3y44GCV
.386 % $J^dF_0
.model flat,stdcall -v]7}[
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option casemap:none Q>|<R[.7
;Include 文件定义 V
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include windows.inc x[_+U4-/
include user32.inc Ft07>E$/Q^
includelib user32.lib 0g1uM:;
include kernel32.inc ]`lTkh
includelib kernel32.lib CkOd>Kn
;数据段 f#!Ljjf$;
.data 8r~4iVwg
szCaption db 'A MessageBox!',0 H6L`239u
szText db 'Hello,world!',0 {3l]/X3
;代码段 v
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.code a{y;Ub
start: m49)c K?
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 7{p,<Uz<"U
invoke ExitProcess,NULL ec{pWzAe
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 5y.kOe4vH
end start |kjk{
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AWK NZv1dy`fa
BEGIN { print "Hello, world!" } &Y\`FY\
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. }^m8PP
BASIC WzF/wzR
传统版BASIC(例如GWBASIC): fi1tF/`
$[H3O(B0*
10 PRINT "Hello, world!" 0;)4.*t
20 END |TkO'QN
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或在提示符输入: d^w6_
"wdC/
?"Hello, world!":END 6<gh:vj
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现代版BASIC(例如Quick BASIC): aK'BC>uFI
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Print "Hello, world!" orJN#0v4
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以下的语句在Quick BASIC中同样有效: 3d[fP#NY7
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? "Hello,world!" GP1b/n3F1
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q5Z]Z.%3O
BCPL ]5wc8Kh"
GET "LIBHDR" _pL:dKfy7
t}+P|$[
LET START () BE \#L}KW
$( (r.[b
WRITES ("Hello, world!*N") bIR7g(PJ.b
$) Rkgpa/te"
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#>h
Befunge T-0fVTeN
"!dlrow olleH">v ~~z}yCl
, `i;f
^_@ "H#2
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Brainfuck U8 '}(
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< `bNY[Gv>)
+++++++++++++++.>.+++.------.--------.>+.>. #R}sGT
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C O(#DaFJv
#include <stdio.h> icH\(
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int main(void) yCpU173V
{ Dwn.0|E
printf("Hello, world!\n"); 'b~,/lZd
return 0; DJR_"8
} |U)M.\h
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C++ _e:c
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#include <iostream> gA D,
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int main() opc`n}Fc
{ /?VwoSgV^
std::cout << "Hello, world!" << std::endl; g[4pG`z
return 0; _c,c;
} EZypqe):/C
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C++/CLI q8#zv_>K
int main() ](-zt9,
N;
{ Bq@_/*'*Y
System::Console::WriteLine("Hello, world!"); y\k#83aU|
} SJ8Ax_9{q
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C# (C Sharp) )B)ecJJ_
class HelloWorldApp X;'H@GU0
{ db#svj*
public static void Main() OXp(rJ*bK
{ #q?'<''d,
System.Console.WriteLine("Hello, world!"); bf@H(gCW=
} B63puX{u#
} PUcxlD/a}
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COBOL O3 NI
IDENTIFICATION DIVISION. 3127 4O
PROGRAM-ID. HELLO-WORLD. ;8m) a
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ENVIRONMENT DIVISION. H< 51dJn~
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DATA DIVISION. gv\WI4"n
ur\<NApT;
PROCEDURE DIVISION. m55|&Ux|
DISPLAY "Hello, world!". mSeCXCrZlI
STOP RUN. l]R=I2t
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Common Lisp 4M*Z1
(format t "Hello world!~%") ?*LVn~y
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q<[m(]:
DOS批处理 _59f.FsVR
@echo off x/NjdK
echo "Hello, world!" x4bmV@b
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Eiffel ` {/"?s|
class HELLO_WORLD Y#[xX2z9
X~g U$
creation T_)G 5a
make *(E]]8o
feature -kzp>=
make is }i._&x`):
local 9x`1VR
:
io:BASIC_IO &8\6%C
do ij5|P4Eka
!!io `NySTd)\
io.put_string("%N Hello, world!") q?y-s
end -- make { k>T*/
end -- class HELLO_WORLD ;&c9!LfP
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Erlang "*<)pnJ
-module(hello). G,!{Q''w
-export([hello_world/0]). G,e!!J
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hello_world() -> io:fwrite("Hello, World!\n"). ULH<FDot
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Forth O@HL%ha
." Hello, world!" CR !mH
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Fortran R =kXf/y
WRITE(*,10)
YWAH(
10 FORMAT('Hello, World!') xL [3R
STOP mor[AJ
END p(>D5uN_}5
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fG zx;<0P!
HTML U4=m>Ty
<HTML> qC6@
<HEAD> J4%"38l
<TITLE> Hello World! </TITLE> #f@}$@
</HEAD> pz= /A
<BODY> m*|G2
<p>Hello World!</p> @4G{L8Q}
</BODY> @>*r2=#14
</HTML> o-<XR9,N*
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INTERCAL mWF\h>]|.
PLEASE DO ,1 <- #13 {8 #
DO ,1 SUB #1 <- #238 GXi)3I%
DO ,1 SUB #2 <- #112 _MWW
DO ,1 SUB #3 <- #112 7jw5'`;)"
DO ,1 SUB #4 <- #0 )>tT""yEl
DO ,1 SUB #5 <- #64 %/2OP &1<
DO ,1 SUB #6 <- #238 l?A~^4(5a/
DO ,1 SUB #7 <- #26 []doLt;J
DO ,1 SUB #8 <- #248 `-MCI)Fq_R
DO ,1 SUB #9 <- #168 &o]fBdn
DO ,1 SUB #10 <- #24 cJ\1ndBH
DO ,1 SUB #11 <- #16 ,zEPdhTX
DO ,1 SUB #12 <- #158 lWDSF]ZYV
DO ,1 SUB #13 <- #52 }Te+Rv7{E
PLEASE READ OUT ,1
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PLEASE GIVE UP (&-I-#i
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Java t>P[Yld"
public class Hello G<P/COI#M5
{ %GP`H/H(
public static void main(String[] args) !?" pnKb}
{ [e>2HIS,
System.out.println("Hello, world!"); Ap~6Vu
} L|8&9F\
} %%9T-+T
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JSP M?5v oV*
<% >y+?Sz!
out.print("Hello, world!"); @O/"s~d-
%> 1:RK~_E
]c1#_MW
JQ|*XU
MIXAL wlQ
@3RN>
TERM EQU 19 the MIX console device number p+228K ;H
ORIG 1000 start address qOAP_\@T
START OUT MSG(TERM) output data at address MSG =QIu3%&
HLT halt execution *x_e] /}
MSG ALF "MIXAL" )X3
|[4R
ALF " HELL" fZ(k"*\MZ
ALF "O WOR" X/buz
ALF "LD " tkmzOc H
END START end of the program 3e>U(ES
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<..直接输出..> b'I@TLE')
Hello, world! 3lbGG42:
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<..或者..> :)y3&