“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。 {S%;By&[
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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》。 aK,\e/Oo
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以下是用不同语言写成的Hello World程序的几个例子: GIR12%-EO
Ada u+jx3aP:
with Ada.Text_Io; use Ada.Text_Io; $m+Pl[s
procedure Hello is K
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begin {cw+kY]m4-
Put_Line ("Hello, world!"); eR3MU]zF
end Hello; +K;%sAZy
IWhe N
ms+gq
汇编语言 -*?{/QmKb
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x86 CPU,DOS,TASM M[R'
MODEL SMALL 1JI7P?\B
IDEAL WS@8Z0@RD
STACK 100H Dl}va
Fy_~~nI0
DATASEG ??P3gA
HW DB 'Hello, world!$' sP8_Y,
|FFMQ"
CODESEG RT9%E/m
MOV AX, @data j2n
4; m
MOV DS, AX i.ivHV~-
MOV DX, OFFSET HW ]ddL'>$c$
MOV AH, 09H .
vea[
INT 21H ;b,
bHL
MOV AX, 4C00H 'w\Gd7E
INT 21H gaL.5_1
END K5+ONA<c
zfGr1;
a -5#8
x86 CPU,GNU/Linux,NASM gGbqXG^
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). u)P)r,
;Enter this into "hello.asm" then type: `M_w^&6+n
;"nasm -f elf hello.asm" %9t=Iu*
;"ld hello.o -o hello" .8CfCRq
;"./hello" q&wv{
~~WX#Od*$
section .data ;data section declaration %B Rll
msg db 'Hello World!',0AH 6b4]dvl_
len equ $-msg ;string length elP#s5l4
%Vsg4DRy
section .text ;code section declaration ?T[K{t;~jo
global _start ;entry point (start of execution) L i`OaP$
_start: mov edx,len ;string length F;Ubdxwwl
mov ecx,msg ;string start `{S4_'
mov ebx,1 ;file handle: stdout k )fLJ9R
mov eax,4 ;sys_write #}'sknvM}
int 80h ;kernel system call x^UAtKSy
HR?a93
mov ebx,0 ;return value '494^1"io
mov eax,1 ;sys_exit G0x!:[
int 80h ;kernel system call '[[*(4a3
7{
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V%J_iY/BUb
x86 CPU,Windows,MASM32 #w)D ml
.386 xEe3,tb'e
.model flat,stdcall 3:!5 ]
option casemap:none BOW`{=
;Include 文件定义 Vdf~rV
include windows.inc e= _7Q.cn
include user32.inc |\q@XCGei
includelib user32.lib J)=Ts({
include kernel32.inc =Xb:.
includelib kernel32.lib ,V=]QHcg
;数据段 OV $|!n
.data dxWG+S
szCaption db 'A MessageBox!',0 8d\/
szText db 'Hello,world!',0 Oj.xJ(uX+v
;代码段 3#c0p790
.code t3aDDu
start: L>2gx$f
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 4:XVu
invoke ExitProcess,NULL
kS(v|d
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> aaesgF
end start
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AWK K;(t@GL?
BEGIN { print "Hello, world!" } JuXuS
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BASIC [S T7CrwC
传统版BASIC(例如GWBASIC): .?-]+-J?`
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10 PRINT "Hello, world!" mF]8
20 END )m$i``*<
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或在提示符输入: $PKUcT0N9
Y\7/`ty
?"Hello, world!":END aboA9pwH
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现代版BASIC(例如Quick BASIC): )u_[cEJHO
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Print "Hello, world!" 5B+I\f&
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以下的语句在Quick BASIC中同样有效: U~[ tp1Z)
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? "Hello,world!" ?O#,|\v?]
hvU\l`m
$3 ~/H"K
BCPL }VXZM7@u
GET "LIBHDR" /7XVr"R
D,;6$Pvg^
LET START () BE G_n~1?
$( yM*<BV
WRITES ("Hello, world!*N") R//S(eU68\
$) &dI;o$t
nL-kBW Ed>
-&_;x&k
/
Befunge (e6KSRh2fF
"!dlrow olleH">v _'DZoOH|VE
, iQ_^MzA
^_@ c9N5c
V(6ovJpA0
sD`OHV:
Brainfuck UG<`m]
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< S.A|(?x
+++++++++++++++.>.+++.------.--------.>+.>. v?(9ZY]
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C cvl1X"
#include <stdio.h> )Aa
h
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int main(void) H;rLU9b
{ 5X"WgR;
printf("Hello, world!\n"); 7`Bwo*Y
return 0; kv'gs+,e
} i$W=5B>SO
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C++ /"OJ~e_%
#include <iostream> 9\D 0mjn=l
naB`@
int main() =5Auk5&
{ /QCyA%y
std::cout << "Hello, world!" << std::endl; 2w? 5vSv
return 0; (dVrGa54
} :#zv,U&OC
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:*{\oqFn~$
C++/CLI ac??lHtH9
int main() `SSUQ#@
{ @&M$oI$4*
System::Console::WriteLine("Hello, world!"); 0vm}[a4+i;
} T hLR<\
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@s/0 .7
C# (C Sharp) Kw^tvRt'*
class HelloWorldApp f.y~ Sew
{ j>t*k!db
public static void Main() -S %)2(f^
{ KdB9Q ;
System.Console.WriteLine("Hello, world!"); |;6l1]hk6
} '=eE6=m^K
} <FFaaGiE>
@:"GgkyDl#
vswBK-w(Z
COBOL [v$NxmRu
IDENTIFICATION DIVISION. D&r2k
9
PROGRAM-ID. HELLO-WORLD. J=qPc}+
H0 .,h;
ENVIRONMENT DIVISION. }8cX0mZ1j
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DATA DIVISION. SQd`xbIuL
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PROCEDURE DIVISION. HfgK0wIi
DISPLAY "Hello, world!". =q-HR+
STOP RUN. Rr>h8Ni <
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@|GKNW#
Common Lisp pe1 _E
KU
(format t "Hello world!~%") B 8ycr~
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AE"E($S`
DOS批处理 kbkq.fYr
@echo off 3qc o2{nz
echo "Hello, world!" \7Fkeo+
2i3& 3oz]O
pD>^Dfd
Eiffel @j Y_^8#S
class HELLO_WORLD W^^}-9
WaRYrTDv64
creation MjHjL~Tg
make #)xg$9LQb
feature wzRIvm{
make is Q5s?/r
local Xqac$%[3
io:BASIC_IO S(f V ,;Z
do 8?7gyp!k_f
!!io Ag!#epi{0
io.put_string("%N Hello, world!") GCgpe(cQ
end -- make a~-^$Fzgy
end -- class HELLO_WORLD S3k>34_%9
E |A,NPf%I
T?Dq2UW
Erlang xf.2Ig
-module(hello). >xt*( j&}
-export([hello_world/0]). MXxE)"G*a
KQ x<{-G6
hello_world() -> io:fwrite("Hello, World!\n"). +i[w& P
:a4FO
F& 'HZX
Forth Um$a9S8b&
." Hello, world!" CR ymsqJ
}bs2Rxkh
cCj pQ
Fortran A<&:-Zz
WRITE(*,10) D?w-uR%Y
10 FORMAT('Hello, World!') drQioH-
STOP V!SB9t`E
END (1vmtg.O
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