“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。 LMN`<R(q]
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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》。 crx%;R
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以下是用不同语言写成的Hello World程序的几个例子: rl2(DA{
Ada Y1F%-o
with Ada.Text_Io; use Ada.Text_Io; XsSDz}dg
procedure Hello is fo<nk|i
begin TkIiO>
Put_Line ("Hello, world!"); ks,d4b=->
end Hello; h\5~&}Hp
b?2 \j}
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汇编语言 G @]n(\7Y
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x86 CPU,DOS,TASM oW>e.}d!
MODEL SMALL dnM.
IDEAL ZTj!ti;5
STACK 100H Ef3="}AI;
e@5w?QzW
DATASEG O7od2fV(i7
HW DB 'Hello, world!$' Tm0\Oue0
M5xMTP-
CODESEG (Zej\lEN
MOV AX, @data F ^lau f
MOV DS, AX {IF$\{Al
MOV DX, OFFSET HW QHsJo|.
MOV AH, 09H cV7a, *
INT 21H BqavI&1=
MOV AX, 4C00H AmUH]+5KT
INT 21H MM&qLAa"f
END M+)ENve
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x86 CPU,GNU/Linux,NASM zFY$^Oz"_
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). +x?8\
;Enter this into "hello.asm" then type: };'~@%U]/
;"nasm -f elf hello.asm" .R#<Q
;"ld hello.o -o hello" kt7Em b}
;"./hello" aU#r`D@0
!,sQB_09C
section .data ;data section declaration ,,g: x
msg db 'Hello World!',0AH X@/wsW(kM\
len equ $-msg ;string length q9\(<<f|
umpa!q};
section .text ;code section declaration n"vO?8Sx
global _start ;entry point (start of execution) 6aWNLJ@
_start: mov edx,len ;string length V<U9Pj^?^
mov ecx,msg ;string start q AsTiT6r
mov ebx,1 ;file handle: stdout <W^>:!?w
mov eax,4 ;sys_write Z}IuR|=
int 80h ;kernel system call w;kiH+&
>#`{(^
mov ebx,0 ;return value $ dKo}
mov eax,1 ;sys_exit gEmsPk,
int 80h ;kernel system call gRw? <U^
#wGOlW;R
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x86 CPU,Windows,MASM32 @# .a5
.386 roIc1Ax:
.model flat,stdcall a,:Nlr3
option casemap:none Sg(\+j=
;Include 文件定义 _+Uf5,.5yU
include windows.inc 3g0v,7,Zv
include user32.inc vtzbF1?O
includelib user32.lib 3=0b
include kernel32.inc UY)Iu|~0b
includelib kernel32.lib
:Z6l)R+V
;数据段 }!WuJz"
.data (%fSJCBl[P
szCaption db 'A MessageBox!',0 `0=j,54cx
szText db 'Hello,world!',0 @[5] ?8\o
;代码段 /1hcw|cfC
.code BtQqUk#L2
start: Lf;Uv[^c
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK |9)y<}c5oM
invoke ExitProcess,NULL _1jeaV9@
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> K~qKr<)
end start w3Dqpo8E
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AWK -(E-yCu
BEGIN { print "Hello, world!" } Q.fD3g
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BASIC WVx^}_FD0
传统版BASIC(例如GWBASIC): ciN*gwI)
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10 PRINT "Hello, world!" JNI&]3[C>?
20 END xfqU
atC
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或在提示符输入: ^>s{o5H&
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?"Hello, world!":END ?~; q r
LEAU3doK;
现代版BASIC(例如Quick BASIC): LOk J
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Print "Hello, world!" Enhrkk
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以下的语句在Quick BASIC中同样有效: p0pA|
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? "Hello,world!" TezwcFqH
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9hhYyqGsO
BCPL py\/m]
GET "LIBHDR" wNl "y
8]J lYe
LET START () BE "g1Fg.o
$( W"s)s
WRITES ("Hello, world!*N") %:Zp7O2UB'
$) l YjPrA]TC
KwxJ{$|xH
G+NTn\
Befunge 7K/t>QrBtU
"!dlrow olleH">v (2/i1)Cq
, }G<A$*L1
^_@ QhPpo#^
l,
-q:8
w)}@svv"
Brainfuck V&d?4i4/Q
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< =CL h<&
+++++++++++++++.>.+++.------.--------.>+.>. #3-hE
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C n:JG+1I
#include <stdio.h> i]0$7s9!
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int main(void) D!bi>]Yd
{ <-!'V,c
printf("Hello, world!\n"); [Ib17#74
return 0; u6/;=]0
} 0Pg@%>yb~
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C++ AKAxfnaR
#include <iostream> Jv D`RUh
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int main() .Mzrj{^Y
{ `u7twW*U2
std::cout << "Hello, world!" << std::endl; Ap`D{u/
return 0; HjX)5@"o(
} *
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C++/CLI ;}AcyVV
int main() 2spK#0n.HV
{ CfHPJ:Qo[
System::Console::WriteLine("Hello, world!"); 'h{DjNSM
} 4?~Ei[KgQn
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C# (C Sharp) cONfHl{
class HelloWorldApp
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{ 2Zw]Uu`sb
public static void Main() su Z`
{ /S%!{;:
System.Console.WriteLine("Hello, world!"); |r53>,oR<:
} 6
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} |(R[5q
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COBOL zuBfkW95+
IDENTIFICATION DIVISION. Q37zBC0
PROGRAM-ID. HELLO-WORLD. uszMzO~
,9/s`o
ENVIRONMENT DIVISION. +F6R@@rWr
c]:@y"W5$
DATA DIVISION. IeJ@G)
"C [uz&
PROCEDURE DIVISION. ]\:l><
DISPLAY "Hello, world!". PX,fg5s\b
STOP RUN. "yxBD
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c# WIB 4
Common Lisp )hK1W\5
(format t "Hello world!~%") s B!2't
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w3peG^4D_
DOS批处理 2N_9S?a3sK
@echo off ^ px)W,O
echo "Hello, world!" n 0ls a@l
IN94[yW{1
~7&O[
Eiffel 58_aI?~>>
class HELLO_WORLD ki|w?0s
j_~lc,+m
creation '#x<Fo~hT
make Q$DF3[NC
feature k3t2{=&'&x
make is c9;oB|8|
local gc{5/U9H*
io:BASIC_IO DX#F]8bWl
do `z3"zso
!!io .Dg'MMBM
io.put_string("%N Hello, world!") x$tzq+N
end -- make g].hL
end -- class HELLO_WORLD v4wXa:CJ
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Erlang Zu %oIk
-module(hello). @?"t&h
-export([hello_world/0]). RlTVx:
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hello_world() -> io:fwrite("Hello, World!\n"). X+XbIbUuL
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Forth y2Z1B2E%f
." Hello, world!" CR vR"<:r47?
hTbot^/
t9
m],aH
Fortran esQRg~aCGy
WRITE(*,10) _a=f.I
10 FORMAT('Hello, World!') \78kShx
STOP T?E[LzZg
END y7#4Mcc`~
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XG}pp`{o
HTML b(H)8#C
<HTML> q! U'DDEP
<HEAD> EaGS}=qY5
<TITLE> Hello World! </TITLE> Y^f12%
</HEAD> Gk5SG_o
<BODY> &g<`i{_
<p>Hello World!</p> Jv=G3=.
</BODY> XS/5y(W
</HTML> wY j~ (P"
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3 eFBe2
INTERCAL 9#@CmiIhy
PLEASE DO ,1 <- #13 vXM``|
DO ,1 SUB #1 <- #238 3M&75OE
DO ,1 SUB #2 <- #112 L&nGjC+Lr
DO ,1 SUB #3 <- #112 VCvqiHn
DO ,1 SUB #4 <- #0 oWUDTio#[
DO ,1 SUB #5 <- #64 {m%X\s;ni
DO ,1 SUB #6 <- #238 L"6@3
DO ,1 SUB #7 <- #26 bz?
*#S
DO ,1 SUB #8 <- #248 oos35xV.
DO ,1 SUB #9 <- #168 5&r2