“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。 5 7e'a&}e
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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》。 WJBi#(SY
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以下是用不同语言写成的Hello World程序的几个例子: 09<O b[%h
Ada Ql sMMIax
with Ada.Text_Io; use Ada.Text_Io; xg %EQ
procedure Hello is M7BCBA
begin `2\vDy1,j
Put_Line ("Hello, world!"); [8AGW7_
end Hello; |i'V\"
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汇编语言 Jr
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AVyO5>w
x86 CPU,DOS,TASM vR<Y1<j
MODEL SMALL I`kaAOe
IDEAL BsiHVr
STACK 100H Xk%92Pto
VH7VJ [
DATASEG #y13(u,dN
HW DB 'Hello, world!$' iLw O4i
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CODESEG !qPVC\l
MOV AX, @data YlDui8.N
MOV DS, AX P]:r'^Yn
MOV DX, OFFSET HW 44 ,:@
MOV AH, 09H CrC1&F\dq
INT 21H 'F3Xb
MOV AX, 4C00H {aP5Mem
INT 21H r=6-kC!T9
END 62K7afH
TB9{e!4
,-^Grmr4M
x86 CPU,GNU/Linux,NASM O_aZ\28};C
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). AFO g*{1
;Enter this into "hello.asm" then type: }z6@Z#%q
;"nasm -f elf hello.asm" ;Ut0tm
;"ld hello.o -o hello" xWlj.Tjt}
;"./hello" "']I.
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section .data ;data section declaration 7?<.L
msg db 'Hello World!',0AH ?_q
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len equ $-msg ;string length `oP :F[B
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section .text ;code section declaration L
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global _start ;entry point (start of execution) j#d=V@=a
_start: mov edx,len ;string length {_QXx
mov ecx,msg ;string start Gqq%q!k&1
mov ebx,1 ;file handle: stdout <a7y]Py
mov eax,4 ;sys_write \xG>>A%
int 80h ;kernel system call LcS\#p#s]
e9/:q"*)/
mov ebx,0 ;return value g*69TqO^
mov eax,1 ;sys_exit DdDO.@-Z
int 80h ;kernel system call ve[` 0
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x86 CPU,Windows,MASM32 |k$^RU<OF
.386 FWI<_KZO
.model flat,stdcall ]s-;*o\H
option casemap:none x? 3U3\W
;Include 文件定义 NNSHA'F,.\
include windows.inc C o v,#j j
include user32.inc [sJ f)<
includelib user32.lib <?'d\B
include kernel32.inc O?e38(
includelib kernel32.lib %LeG.~?
;数据段 Yy`\??,
.data gV@FT|j!i
szCaption db 'A MessageBox!',0 - &u]B$
szText db 'Hello,world!',0 ! iuDmL
;代码段 /.r|ron:e
.code |kJ'FZZd
start: gSQq
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK |}N -5U
invoke ExitProcess,NULL Zg1=g_xY
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> qYFOHu
end start 9/3gF)I}
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BEGIN { print "Hello, world!" } o))z8n?b
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BASIC X!Ag7^E
传统版BASIC(例如GWBASIC): P{j2'gg3
g
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10 PRINT "Hello, world!" ~t7?5b?*\
20 END `|?K4<5|
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或在提示符输入: E~vM$$O$
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?"Hello, world!":END .vsrZ_y?
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现代版BASIC(例如Quick BASIC): QND{3Q
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Print "Hello, world!"
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以下的语句在Quick BASIC中同样有效: !5I;3EN
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? "Hello,world!" 0Oy.&C T
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BCPL ybLl[K(D=
GET "LIBHDR" hG~4i:p
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LET START () BE 3cfJ(%'X
$( "(bnr0
WRITES ("Hello, world!*N") YaiogA
$) Xc"l')1H
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Befunge {8+FxmH
"!dlrow olleH">v ROcI.tL
, 8R?X$=$]!.
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Brainfuck )!SA]>-
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< eC`} oEz
+++++++++++++++.>.+++.------.--------.>+.>. Y'-@O"pK
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C {wsO8LX
#include <stdio.h> )CgKZ"
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int main(void) [Q"*I2&
{ %oPW`r
printf("Hello, world!\n"); m? 3!
return 0; ;75m 9yGo
} %siBCjvo=
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C++ <ZmC8&Uo
#include <iostream> XC44]o4jx
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int main() Zo$,{rl
{ t
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std::cout << "Hello, world!" << std::endl; =iJfz
return 0; 0"l*8%g
} Y9V%eFY5E
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C++/CLI %L;z ~C
int main() j v9DQr
{ l Tpn/
System::Console::WriteLine("Hello, world!"); O3ij/8f
} o[=h=&@5p
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C# (C Sharp) z!`aJE/
class HelloWorldApp rl:6N*kK
{ $D;/b+a
public static void Main() ]QM{aSvXA
{ Iv,Ub_Ll9
System.Console.WriteLine("Hello, world!"); N
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} LPuc&8lGWf
} T}fH
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COBOL 72Zp%a=
IDENTIFICATION DIVISION. VtM:~|v
PROGRAM-ID. HELLO-WORLD. Buxn!s
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ENVIRONMENT DIVISION. {B;<R1
tj ONN(K`
DATA DIVISION. h\qQ%|X
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PROCEDURE DIVISION. %K9pnq/T^
DISPLAY "Hello, world!". .kbo]P
STOP RUN. Z\1*g k
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;"}
Cd Bsd
Common Lisp s,z$Vt"h*K
(format t "Hello world!~%") sGBm[lplz
A=N &(k
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DOS批处理 BH`%3Mw
@echo off ;i;2cq
echo "Hello, world!" ucP"<,a
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Eiffel (w1M\yodV
class HELLO_WORLD $!?tJ@{
2il)@&^
creation %R|_o<(#MJ
make .8.4!6~@
feature x6n( BMr
make is a,$v; s/
local G`;YB
io:BASIC_IO Pn?,56SD=
do kdq<)>"
!!io OEZ`5"j
io.put_string("%N Hello, world!") 3y#U|&]{
end -- make <R;t>~8x
end -- class HELLO_WORLD zcqv0lM '
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Erlang YGdzA]3>
-module(hello). Xl/SDm_p
-export([hello_world/0]). rofGD9f
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hello_world() -> io:fwrite("Hello, World!\n"). y3Z\ Y[
-(oFO'Lbg
{fd/:B 7T
Forth Z91{*?
." Hello, world!" CR "d5nVO/
d:<</ah
;#i$5L!*B
Fortran G5l?c@o
WRITE(*,10) uGoySt&;(
10 FORMAT('Hello, World!') c}-ADr9
STOP 5%6{ ePh{
END t^k^e{,q#
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HTML *ku}.n
<HTML> {s{bnU
<HEAD> _ArN[]Z
<TITLE> Hello World! </TITLE> ~[N"Q|D3Y
</HEAD> B2kKEMdGg
<BODY> D4G*Wz8
<p>Hello World!</p> hx.ln6=4
</BODY> `GpOS_;
</HTML> HL`=zB%
:-[y`/R
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n5NwiSE
sC}p_'L
INTERCAL 78MQoG<
PLEASE DO ,1 <- #13 v1j&oA}$.
DO ,1 SUB #1 <- #238 pzcl@
DO ,1 SUB #2 <- #112 kq4ii`zi8
DO ,1 SUB #3 <- #112 8mc0(Z@
DO ,1 SUB #4 <- #0 dSP~R
DO ,1 SUB #5 <- #64 K*/X{3 J;
DO ,1 SUB #6 <- #238 c/'Cju W
DO ,1 SUB #7 <- #26 Iq?#kV9)
DO ,1 SUB #8 <- #248 <Pnz$nH:e
DO ,1 SUB #9 <- #168 Sb|9U8h
DO ,1 SUB #10 <- #24 >WZ_) `R
DO ,1 SUB #11 <- #16 6OPYq*|
DO ,1 SUB #12 <- #158 ,_iR
DO ,1 SUB #13 <- #52 vVyX[ZZ
PLEASE READ OUT ,1 p"dK,A5#)
PLEASE GIVE UP x| =]Xxco
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Java i]{-KZC
public class Hello ~lQ<#*wl
{ N?3BzI%?
public static void main(String[] args) AzZb0wW6p
{ q(XO_1W0V
System.out.println("Hello, world!"); \'Z^rjB
} {Q(R#$)5+
} X~VJO|k pz
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DX b=Ku
JSP 8q/3}AnI
<% S)\Yc=~h
out.print("Hello, world!"); 1"fbQ^4`
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; !9-I%e
gLzQM3{X9
MIXAL "Nh}_jO
TERM EQU 19 the MIX console device number v*lj>)L
ORIG 1000 start address Z1Pdnc7S[
START OUT MSG(TERM) output data at address MSG mzbMX
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HLT halt execution "/g\?Nce
MSG ALF "MIXAL" zqlgJn
ALF " HELL" 8`Iz%rw&(J
ALF "O WOR" &<Iz?AVr
ALF "LD " *Z}9S9YtN
END START end of the program gNaB^IY
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Nuva +\s&v!
<..直接输出..> lBZhg~{
Hello, world! s;Sv@=\
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<..或者..> W&s@2y?rF
wqE+hKs,
<. _!C M
// 不带换行 ;hZ^zL
? "Hello, world!" x*a^msY%
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// 或者 HlgkW&