“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。 4`B:Mq&j
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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》。 iFnM6O$(
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以下是用不同语言写成的Hello World程序的几个例子: 3dfSu'
Ada |RdSrVB
with Ada.Text_Io; use Ada.Text_Io; O1PdM52
procedure Hello is 9i@*\Ada
begin F);C?SW"
Put_Line ("Hello, world!"); 7Uh}|6PU
end Hello; 0td;Ag
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汇编语言 gxiJ`.D=
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x86 CPU,DOS,TASM IdM;N
MODEL SMALL -Q/Dbz#-
IDEAL UA^E^$f:
STACK 100H pa7fTd
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1
DATASEG ["z$rk
HW DB 'Hello, world!$' 94+#6jd e
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CODESEG Wr;)3K
MOV AX, @data |( KM 8
MOV DS, AX K%;O$
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MOV DX, OFFSET HW AdhCC13B
MOV AH, 09H x&sF_<[
INT 21H q?6Zu:':
MOV AX, 4C00H drH!?0Dpg
INT 21H 5<61NnZ
END h<uQ~CQg
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x86 CPU,GNU/Linux,NASM yy9Bd>
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). )K}b,X`($
;Enter this into "hello.asm" then type: ]HRE-g
;"nasm -f elf hello.asm" gpPktp2
;"ld hello.o -o hello" :]x)lP(3E
;"./hello" HtMlSgx,8>
@9^kl$
section .data ;data section declaration <ioX|.7ZX
msg db 'Hello World!',0AH G"'DoP7p9
len equ $-msg ;string length Skx TgX5
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section .text ;code section declaration &c A?|(7-
global _start ;entry point (start of execution) Kl^Yq
_start: mov edx,len ;string length 3#dUQ1qo6
mov ecx,msg ;string start v5&WW?IBQ
mov ebx,1 ;file handle: stdout \HR QSfGt
mov eax,4 ;sys_write 4*'NpqC(_
int 80h ;kernel system call iud%X51
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mov ebx,0 ;return value <F&S
mov eax,1 ;sys_exit rq$%
int 80h ;kernel system call qoOHWh&
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j&8U:Q,
x86 CPU,Windows,MASM32 F|V?Z
.386 rBpr1XKl,
.model flat,stdcall wd u>3Ch"y
option casemap:none tEb2>+R
;Include 文件定义 2 !{P<
include windows.inc 5o&L|7]
include user32.inc \@5W&Be^
includelib user32.lib N:=D@x~]
include kernel32.inc Ey)ox$
includelib kernel32.lib y![h
;数据段 594$X@!v
.data TLi0*)}
szCaption db 'A MessageBox!',0 S# SA :>8s
szText db 'Hello,world!',0 !iITX,'8
;代码段 bvZmozbD
.code ;u, 5
2
start: tw^V?4[Miu
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 6jom6/F 4
invoke ExitProcess,NULL 0!xD+IA!8
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ~KEnZa0
end start >C@fSmnOM
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AWK s|dL.@0,L
BEGIN { print "Hello, world!" } f'*HP%+Y
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BASIC Wu%;{y~#}
传统版BASIC(例如GWBASIC):
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LTG/gif[u
10 PRINT "Hello, world!" _/7[=e}y
20 END 2L ~U^
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或在提示符输入: Onby=Y
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?"Hello, world!":END "!r7t4
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现代版BASIC(例如Quick BASIC): o{m$b2BW
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Print "Hello, world!" SC"=M^E
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以下的语句在Quick BASIC中同样有效: ]'MLy#9
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? "Hello,world!" :@ 19,.L
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BCPL ;%hlh)k$
GET "LIBHDR" (T!Q
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LET START () BE o=4d2V%m
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WRITES ("Hello, world!*N") jcv3ES^
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Befunge / IAK'/
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#include <stdio.h> /0\m;&
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int main(void) (KK9/k
{ DU|0#z=*t5
printf("Hello, world!\n"); C$b$)uI;
return 0; Zii<jZ.)<
} w<tr<Pu'
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C++ :(!il?
#include <iostream> Wu,'S;>C
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int main() 5NZob<<
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std::cout << "Hello, world!" << std::endl; L/_OgL]YdI
return 0; (B}+uI{
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C++/CLI {r#2X1
int main() )ZEUD] X
{ AVyqtztQ
System::Console::WriteLine("Hello, world!"); ^^qB=N[';
} x24
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C# (C Sharp) h1^q};3!W\
class HelloWorldApp y<.0+YL-e+
{ Ec y|l;
public static void Main() !=;^Grv>
{ ]!E|5=q
System.Console.WriteLine("Hello, world!"); #joGIw
} ]j(2FM)#
} > nDx)!I
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COBOL ;;pxI5
IDENTIFICATION DIVISION. RMMx6L|-:
PROGRAM-ID. HELLO-WORLD. g7res
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ENVIRONMENT DIVISION. \Lv
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DATA DIVISION. j(HC^\Hi
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PROCEDURE DIVISION. (Hb
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DISPLAY "Hello, world!". |kyxa2F{
STOP RUN. $`W.9
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rl qn39
Common Lisp OM*N) *
(format t "Hello world!~%") jbcJ\2
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DOS批处理 L!x7]g,^
@echo off hPLQ)c?
echo "Hello, world!" }2:/&H'
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Eiffel vi')-1Y
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class HELLO_WORLD -&I%=0q
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creation jU
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make mE^mQ [Dk
feature [0U!Y/?6lA
make is jE|Ju:}&
local -bJht
io:BASIC_IO Is&z~Xy/
do {Tb(4or?=b
!!io [ R1S+i
io.put_string("%N Hello, world!") *jM~VTXwt
end -- make Z?
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end -- class HELLO_WORLD 6C@,&2<yK
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Erlang o ?@,f/"5
-module(hello). y33+^
-export([hello_world/0]). $BKGPGmh
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hello_world() -> io:fwrite("Hello, World!\n"). ~Fp,nE-B
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Forth -jy-KC
." Hello, world!" CR yo]!Zn
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Fortran Lsa&A+fru
WRITE(*,10) YSERQo
10 FORMAT('Hello, World!') fWie fv[&
STOP Mqc"
END SQx%CcW9d
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HTML &TYTeJ]
<HTML> Z]f_?@0
<HEAD> ~Z-M?8:
<TITLE> Hello World! </TITLE> %&m/e?@%I
</HEAD> ?,~B@Kx
<BODY> R!IODXP=
<p>Hello World!</p> ]G.ttfC
</BODY> 1vKc>+9
</HTML> *ub]M3O
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