“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。 :Kt mSY
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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》。 7ZR0M&pX
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以下是用不同语言写成的Hello World程序的几个例子: J}93u(T5
Ada ~h~r]tV*+
with Ada.Text_Io; use Ada.Text_Io; ZFd{q)qe
procedure Hello is `s|\"@2
begin k-t,y|N
Put_Line ("Hello, world!"); f(zuRM^5
end Hello; >ZOZv
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汇编语言 ir1RAmt%
Jq=>H@il
x86 CPU,DOS,TASM h;mQ%9 Yd
MODEL SMALL rkER`
IDEAL jw6 ng>9
STACK 100H j2C^1:s@m
^{:[^$f:l
DATASEG s^x ,S
HW DB 'Hello, world!$' *jqPKK/
'! 2
CODESEG 'j=PbA
MOV AX, @data 4'u|L&ow
MOV DS, AX .x9nWa
MOV DX, OFFSET HW |7 W6I$Xl
MOV AH, 09H >O[^\H!\
INT 21H V0wC@?
MOV AX, 4C00H :EmMia-)J
INT 21H Ky{I&}+R|
END :O_<K&
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x86 CPU,GNU/Linux,NASM {pi67"mYp
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). B3i=pcef
;Enter this into "hello.asm" then type: q'U-{~q%
;"nasm -f elf hello.asm" H#d! `
;"ld hello.o -o hello" w2mlqy2L
;"./hello" 1QdB`8in
.bl/At3A
section .data ;data section declaration Q-3J0=
msg db 'Hello World!',0AH }F9?*2\/
len equ $-msg ;string length #)c;i<Q3S
<\#
section .text ;code section declaration ^SelqX
global _start ;entry point (start of execution) 6!Ap;O^*
_start: mov edx,len ;string length d+wNGN
mov ecx,msg ;string start R;I-IZS:
mov ebx,1 ;file handle: stdout $DMu~wwfG
mov eax,4 ;sys_write (\[!,T"[
int 80h ;kernel system call E EnTq
(Su2\x
mov ebx,0 ;return value 0yEyt7
~@
mov eax,1 ;sys_exit )SZ,J-H08w
int 80h ;kernel system call 5=;I|l,
`J;/=tf09
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x86 CPU,Windows,MASM32 OA5md9P;d
.386 T;vPR,]rz
.model flat,stdcall &JzF
option casemap:none &-.eu
;Include 文件定义 97=YFK~*
include windows.inc 1Yx[,GyC>&
include user32.inc ry<}DK<u
includelib user32.lib Ik2szXh[J
include kernel32.inc N4JL.(m){I
includelib kernel32.lib (VF4]
;数据段 jjlCi<9CQ^
.data ;`Ch2b1+
szCaption db 'A MessageBox!',0 $/sZYsN~T
szText db 'Hello,world!',0 /[|md0,
;代码段 'm.XmVZL%
.code t7`Pw33#kY
start: a!]QD`
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK '/)_{Ly
invoke ExitProcess,NULL Ih0>]h-7
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Z`Eb
L
end start tfU3 6PR
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AWK UyfIAC$S
BEGIN { print "Hello, world!" } ~\(>m=|C:H
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MnsWB[
BASIC v-]-wNqT
传统版BASIC(例如GWBASIC): rsj}hS$
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10 PRINT "Hello, world!" >]N0w
20 END i!-sbwd7
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或在提示符输入: wOl-iN=
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?"Hello, world!":END %3B>1h9N
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现代版BASIC(例如Quick BASIC): 9>Z#o<*_/
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Print "Hello, world!" :jp$X|
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以下的语句在Quick BASIC中同样有效: +mF 2yh
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? "Hello,world!" zU=[Kc=$
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BCPL u,k8i:JY
GET "LIBHDR" ju6_L<
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LET START () BE ^ x#RUv
$( KTREOOu .t
WRITES ("Hello, world!*N") S~9kp?kR$
$) w3hL.Z,kV
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~_\2\6%1^n
Befunge @Bwl)G!|
"!dlrow olleH">v !a&F:Fbm
, <%5uzlp
^_@ 5~6y.S
9Qd'=JQl
O&RHCR-\
Brainfuck >R0j<:p :
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< h$h`XBVZe;
+++++++++++++++.>.+++.------.--------.>+.>. /]>{"sS(
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#include <stdio.h> U?C{.@#w
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int main(void) 7im;b15j`'
{ "qp_*Y
printf("Hello, world!\n"); tHo/uW_~I
return 0; cjpl_}'L:
} spDRQ_qq
!ry+ r!"
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C++ 0]W/88ut*u
#include <iostream> OH~qJ<
'0?E|B]Cp%
int main() bHG>SW\]`?
{ ?':'zT
std::cout << "Hello, world!" << std::endl; t;6/bT-
return 0; >b${rgCvQ
} tq93 2M4
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#&gy@!a~
C++/CLI t:n|0G(
int main() OOwJ3I >]>
{ q+Q)IVaU81
System::Console::WriteLine("Hello, world!"); ,g.=vQm:?
} h2snGN/{Hb
t)+dW~g
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C# (C Sharp) zYJxoC{
class HelloWorldApp 9(]j
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{ P;[mw(
public static void Main() 4h(Hy&1C
{ hQeZI+
System.Console.WriteLine("Hello, world!"); ?uv%E*TU
} 2F]MzeW
} s os&
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Fb-TCq1y#
COBOL >iV(8EgBS
IDENTIFICATION DIVISION. EpMEA1=&
PROGRAM-ID. HELLO-WORLD. ~;` #{$/C&
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ENVIRONMENT DIVISION. zD|W3hL2&
4'*K\Ul).H
DATA DIVISION. [Xg"B|FD0
~:Nyv+g,$
PROCEDURE DIVISION. v}i}pQ\DK
DISPLAY "Hello, world!". 85]UrwlA4
STOP RUN. vZsVxx99
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4[wP$
Common Lisp :r=_\?
(format t "Hello world!~%") 'Mtu-\
f{oWd]eAhb
9NAlgET
DOS批处理 -t?G8,,
@echo off c^%k1pae(
echo "Hello, world!" +UtK2<^:o
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[5-5tipvWp
Eiffel yFqC-t-i
class HELLO_WORLD gw^+[}U#
~E~J*R Ze
creation ^DOcw@Z6HC
make FW,D\51pTP
feature Y@eUvz
make is L&%iY7sC`
local HVpaVM
io:BASIC_IO WBIS
do 4 vphLAm
!!io 4{pa`o3
io.put_string("%N Hello, world!") wr(?L7
$+
end -- make |Rc#Q<Vh|
end -- class HELLO_WORLD Tc:`TE=2
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Erlang \;<Y/sg
-module(hello). DSp@
-export([hello_world/0]). >%,tyJ~
W#Z]mt B
hello_world() -> io:fwrite("Hello, World!\n"). tK*f8X+q
^=j$~*(LmX
HN+z7 Q8hH
Forth o-_a0j
." Hello, world!" CR OJaU,vQ#
2NM}u\%c/
so*7LM?ib>
Fortran T7`Jtqf
WRITE(*,10) v.MWO]L
10 FORMAT('Hello, World!') 4m:E:zVn
STOP vbp)/I-h
END +]X^bB[
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