“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。 a+]=3o
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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》。 KQW
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以下是用不同语言写成的Hello World程序的几个例子: @RaMO#
Ada o_G.J4 V
with Ada.Text_Io; use Ada.Text_Io; _'j>xK
procedure Hello is xOu
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begin * 5P/&*c|
Put_Line ("Hello, world!"); SH}O?d\Q:
end Hello; @&M$`b
^
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汇编语言 J::SFu=
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x86 CPU,DOS,TASM @69q// #B
MODEL SMALL Z.R^@@RqJ
IDEAL BwBv'p+n
STACK 100H lXz<jt@5
ruE.0V I@
DATASEG LQ{4r1,u]
HW DB 'Hello, world!$' V@Po}
a<\m`
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CODESEG O9>/WmLe
MOV AX, @data fwl
RwH(
MOV DS, AX (iS94}-)
MOV DX, OFFSET HW aMj3ov8p
MOV AH, 09H V25u'.'v
INT 21H {=R=\Y?r&
MOV AX, 4C00H a>Q7Qn
INT 21H m*I5 \
END Fir7z nRW
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p$"*U[%l
x86 CPU,GNU/Linux,NASM da2BQ;
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 2oq>tnYyV[
;Enter this into "hello.asm" then type: >eU;lru2Q
;"nasm -f elf hello.asm" 8"S0E(,mu
;"ld hello.o -o hello" p6ZKyi
;"./hello" a{)"KA P
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section .data ;data section declaration E7jv
msg db 'Hello World!',0AH w\\
len equ $-msg ;string length U1&m-K
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section .text ;code section declaration q=6M3OnS>
global _start ;entry point (start of execution) Zo&U3b{Dy
_start: mov edx,len ;string length gWJLWL2
mov ecx,msg ;string start IXC: Q
mov ebx,1 ;file handle: stdout US
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mov eax,4 ;sys_write t(s']r
int 80h ;kernel system call b2:CFtH5
7W 4[1
mov ebx,0 ;return value /h
mov eax,1 ;sys_exit ousoG$Pc
int 80h ;kernel system call y|1-,u.$
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x86 CPU,Windows,MASM32 %3~jg
.386 Q+#, VuM
.model flat,stdcall 6rR}qV,+{
option casemap:none &}*[-z
;Include 文件定义 2.2 s>?\
include windows.inc xe_c`%_
include user32.inc 7<X_\,I
includelib user32.lib (Kx3:gs
include kernel32.inc "|&SC0*
includelib kernel32.lib SVeL c
;数据段 ZfIQ Fh>
.data G0<m3 Up
szCaption db 'A MessageBox!',0 Wny{qj)=
szText db 'Hello,world!',0 6R"& !.ZF
;代码段 0 5 `x$f
.code QDLtilf :
start: DQwbr\xy\
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK >a]{q^0
invoke ExitProcess,NULL "-\I?k
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> a^|mF#
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end start w 8T#~Dc
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AWK 5Vf#(r f
BEGIN { print "Hello, world!" } y1@{(CDp"
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BASIC | [P!9e
传统版BASIC(例如GWBASIC): l2z@t3{
O &;Cca
10 PRINT "Hello, world!" <08)G7
20 END $,F1E VJ
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或在提示符输入: V+-%$-w>
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?"Hello, world!":END g2BE-0, R
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现代版BASIC(例如Quick BASIC):
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Print "Hello, world!" ={B%qq
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以下的语句在Quick BASIC中同样有效: /*i[MB
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? "Hello,world!" Y2W|b5
2V:`':
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BCPL +d>?aqI\A
GET "LIBHDR" Xq@Bzya
8,7^@[bzXx
LET START () BE e
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$( SFv'qDA
WRITES ("Hello, world!*N") C6Lc
$) o#fr5>h-w
g]vo."}5E
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Befunge L7;8:^ v
"!dlrow olleH">v k{d]
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JlR$"GU
Brainfuck #9zpJ\E
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+++++++++++++++.>.+++.------.--------.>+.>. 6I2`oag
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C x<5ARK6\=
#include <stdio.h> d^MRu#]
v|\3FEu@
int main(void) v;soJlxF~
{ ,2YZB*6h{
printf("Hello, world!\n"); @@JyCUd
return 0; VWq]w5oQO
} s@Dln
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C++ A]Bf&+V
#include <iostream> "!+gA&
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int main() @A4$k
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{ H-vHcqFx3
std::cout << "Hello, world!" << std::endl; w4(L@1
return 0; 27k(`{K
} T/a=z
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C++/CLI }}"pQ!Z
int main() ]{oZn5F
{ (+c1 .h
System::Console::WriteLine("Hello, world!"); !_vxbfZO
} d]poUN~x
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C# (C Sharp) =:aJZ[UU<2
class HelloWorldApp P #O2MiG
{ ak7kb7 5o
public static void Main() m8ts!6C
{ 2]1u0-M5L
System.Console.WriteLine("Hello, world!"); ;-6-DEL
} 4vEP\E3u<j
} B*N1)J\5
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COBOL +? h}e
IDENTIFICATION DIVISION. 7i*eKC`ZqK
PROGRAM-ID. HELLO-WORLD. <XIIT-b[
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ENVIRONMENT DIVISION. #0>xa]S
C,An\lsT
DATA DIVISION. " !~o
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PROCEDURE DIVISION. T1]?E]m{
DISPLAY "Hello, world!". 1h&`mqY)L.
STOP RUN. =eDIvNps
2 %dL96
d=/0A\O
Common Lisp DcW?L^Mst
(format t "Hello world!~%") P(hGkY=(
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]1|P|Jp
DOS批处理 N-gYamlQ
@echo off D7;9D*o\
echo "Hello, world!" gv''A"
<eoie6@3
L=l&,ENy
Eiffel ^U}k
class HELLO_WORLD /8FmPCp}r
.\n` 4A1z
creation l~6K}g?
make Q?#I{l)V(
feature 5o#JHD
make is .UG`pRC
local [d: u(
io:BASIC_IO BmG(+;;&
do T3X'73M
!!io /ad9Q~nJ
io.put_string("%N Hello, world!") ']r8q %
end -- make 4J2^zx,H
end -- class HELLO_WORLD Xw-[Sf]p
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XBQt:7[<
Erlang !+eH8
-module(hello). CL|/I:%0
-export([hello_world/0]). EY,jy]|#
X@rA2);6
hello_world() -> io:fwrite("Hello, World!\n"). E>!=~ 7.
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@^P^-B
Forth D 2X_Yv
." Hello, world!" CR Zw.8B0W
Fx9-A8oIR
9R50,lsE
Fortran <+`%=r)4
WRITE(*,10) Lo%n{*if
10 FORMAT('Hello, World!') g!'R}y
STOP t|aV:x
END g7 \=
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M/zO|-j&
HTML XKoY!Y\
<HTML> {>]\<
<HEAD> z3oi(
<TITLE> Hello World! </TITLE> +yGQt3U
</HEAD> '![oLy
<BODY> 1Kg0y71"
<p>Hello World!</p> YW7W6mWspS
</BODY> $><