“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。 Qn7l-:`?
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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》。 Ur626}
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以下是用不同语言写成的Hello World程序的几个例子: x Qh?
Ada a9E!2o+,
with Ada.Text_Io; use Ada.Text_Io; t|X |67W
procedure Hello is h]94\XQ>$
begin rI:KZ}GZ
Put_Line ("Hello, world!"); k"P2J}4eO
end Hello; O8+[)+6^
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-%=StWdb
汇编语言 @Y>3 -,o,S
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x86 CPU,DOS,TASM 6bg+U`&g
MODEL SMALL 0NSn5Hq
IDEAL $p4aNC
STACK 100H {zGIQG9
OvPy+I
DATASEG V=|^r?
HW DB 'Hello, world!$' 8-5a*vV,>
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CODESEG ,h2q37
MOV AX, @data We]X+>BlO
MOV DS, AX ~MY(6P
MOV DX, OFFSET HW
hh"0z]
MOV AH, 09H );h\0w>3
INT 21H qD\%8l.]Z
MOV AX, 4C00H (nrrzOax
INT 21H AEwb'
END 4(4JQ(5
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x86 CPU,GNU/Linux,NASM $UjSP
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). S'-<p<;D\B
;Enter this into "hello.asm" then type: lkg-l<c\J
;"nasm -f elf hello.asm"
F!>K8 q
;"ld hello.o -o hello" 1A-8,)
;"./hello" v%<_Mh
>*} qGk
section .data ;data section declaration 3i(k6)H$4
msg db 'Hello World!',0AH MatC2-aV1
len equ $-msg ;string length bT-G<h*M
@`.u"@
section .text ;code section declaration !BEOeq@2.
global _start ;entry point (start of execution) U>;itHW/
_start: mov edx,len ;string length ?<frU ,{
mov ecx,msg ;string start ioi
mov ebx,1 ;file handle: stdout oz5o=gt7
mov eax,4 ;sys_write LO61J_J<
int 80h ;kernel system call YLd
5
d L%E0o
mov ebx,0 ;return value i`]M2Q
mov eax,1 ;sys_exit ,:\2Lf
int 80h ;kernel system call l3MbCBX2
qd|*vE
@@|E1'c7
x86 CPU,Windows,MASM32 Vd<=
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.386 [bPE?_a,
.model flat,stdcall J-PzI FWd
option casemap:none <vt^=QA'
;Include 文件定义 )dL?B9d:
include windows.inc rF0zGNH
include user32.inc ^RWt
includelib user32.lib L)nVNY@Mc
include kernel32.inc (+]k{
includelib kernel32.lib GPx S.&
;数据段 |>3a9]
.data x}x@_w
szCaption db 'A MessageBox!',0 }2c}y7B,_
szText db 'Hello,world!',0 b$R>GQ?#
;代码段 , D1[}Lr=K
.code JNp`@`0V
start: 1yB;"q&Xd
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK V2FE|+R%g
invoke ExitProcess,NULL u}%&LI`.
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |I\A0a a
end start ,Vs:Lle
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AWK ''v1Pv-
BEGIN { print "Hello, world!" } d7^XP
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BASIC e4)gF*
传统版BASIC(例如GWBASIC): sId5pY!
aq5<Ks `r
10 PRINT "Hello, world!" E7eVg*Cvi
20 END ygfqP
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或在提示符输入: &yA<R::o
(x^|
?"Hello, world!":END =-VV`
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现代版BASIC(例如Quick BASIC): |%V.Lae
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Print "Hello, world!" qBNiuV;*
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以下的语句在Quick BASIC中同样有效: YqJIp. Z
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? "Hello,world!" fcZOsTj
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(&*F`\
BCPL '9/kDkt!
GET "LIBHDR" ^n2w6U0
Qx,G3m[}
LET START () BE .4Ny4CMHZ
$( o7T|w~F~R
WRITES ("Hello, world!*N") 1I+5
$) :> q?s
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j d81E
Befunge W_
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"!dlrow olleH">v *(scSC>
, ]Cz16e&=2
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Brainfuck m5p~>]}fYF
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< " /'=gE
+++++++++++++++.>.+++.------.--------.>+.>. k`AJ$\=
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C ".0W8=
#include <stdio.h> H\k5B_3OU
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int main(void) CbHNb~
{ :9YQX(l8
printf("Hello, world!\n"); -0X> y
return 0; )mPlB.
} -&EmEXs%
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C++ !:t9{z{Ixg
#include <iostream> \+uqP:Ty
hjG1fgEj
int main() 4r. W:}4:
{ 'MUrszOO.e
std::cout << "Hello, world!" << std::endl; DsX>xzM
return 0; itF+6wv~
} LbR-uc?x
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ger<JSL%
C++/CLI x]ti3?w
int main() fI1;&{f
{ QB[s8"S
System::Console::WriteLine("Hello, world!"); * jK))|%
} %&Cl@6
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C# (C Sharp) MQ*#oVqv
class HelloWorldApp DH
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{ S
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public static void Main() 0'hx w3#
{ OkZ! ZS
h
System.Console.WriteLine("Hello, world!"); psC7IE<v
} lAk1ncx
} qYiAwK$
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COBOL [bv@qBL
IDENTIFICATION DIVISION. 1[l>D1F?
PROGRAM-ID. HELLO-WORLD. 2NknC>9(\
@'*#]YU8
ENVIRONMENT DIVISION. y.:-
$-]setdY
DATA DIVISION. ^,K.)s
C/waH[Yzan
PROCEDURE DIVISION. ]7t\%_
DISPLAY "Hello, world!". s7o*|Xv
STOP RUN. z[%v_S
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[\9(@Bx
Common Lisp LDEt.,6i
(format t "Hello world!~%") uS#Cb+*F
K=x1mM+RK
IKDjatn
DOS批处理 F[=lA"F^
@echo off yl<$yd0Zdu
echo "Hello, world!" }AW)R&m
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xqWrW)
Eiffel ,?<h] !aQ
class HELLO_WORLD m]d6@"Z.
^Cn]+0G#C8
creation ff1B)e
make 0~b6wuFl
feature !7`=rT&