“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。 6xj&Qo
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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》。 % l5J
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以下是用不同语言写成的Hello World程序的几个例子: v4S|&m
Ada 'rCwPsI&4
with Ada.Text_Io; use Ada.Text_Io; 8} S|iM
procedure Hello is x&?35B
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begin Ii,L6c
Put_Line ("Hello, world!"); ZsV'-gu
end Hello; 0c`wJktWK
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汇编语言 X#Hs{J~@p
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x86 CPU,DOS,TASM ixU1v~T
MODEL SMALL -aec1+o
IDEAL 8cW]jm
STACK 100H &d~6MSk
@s@r5uR9B
DATASEG q|Ga
HW DB 'Hello, world!$' K@?S0KMK
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CODESEG 6t@3
a?
MOV AX, @data ,NVQ C=
MOV DS, AX Z4rK$B
MOV DX, OFFSET HW =MoPOib\n
MOV AH, 09H 8# 9.a]AX
INT 21H WMYvE\"
MOV AX, 4C00H M'[J0*ip
INT 21H CaK 0o*D
END EJN}$|*Av
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= [:ruE
x86 CPU,GNU/Linux,NASM t/nu/yz5E
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). iXXgPapz
;Enter this into "hello.asm" then type: PY) 74sa
;"nasm -f elf hello.asm" .+ _x|?'
;"ld hello.o -o hello" ON!1lS
;"./hello" eP;lH~!.0
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section .data ;data section declaration 3ne=7Mj
msg db 'Hello World!',0AH (Kx3:gs
len equ $-msg ;string length
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)2:d8J\
section .text ;code section declaration 5 kQC
global _start ;entry point (start of execution) sx|=*j,_
_start: mov edx,len ;string length ?_ p3^kl
mov ecx,msg ;string start C/lpSe
mov ebx,1 ;file handle: stdout j1>1vD-`T
mov eax,4 ;sys_write T}U`?s`)
int 80h ;kernel system call zi<C5E`
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mov ebx,0 ;return value UXe @c@3
mov eax,1 ;sys_exit %/~Sq?f-9@
int 80h ;kernel system call W${0#qq
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x86 CPU,Windows,MASM32 _W&.{
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.386 7eZ,;
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.model flat,stdcall +jQW 6k#
option casemap:none ~|+
;Include 文件定义 X(N!y"z
include windows.inc w 8T#~Dc
include user32.inc 91[(K'=&
includelib user32.lib [9*+s
include kernel32.inc @_0XK)pW
includelib kernel32.lib [?_^Cy
;数据段 &Q 3!ty
.data F DXAe-|Q
szCaption db 'A MessageBox!',0 0(HUy`]>
szText db 'Hello,world!',0 td{$c6
;代码段 [&"`2n
.code )g+~"&Gcx
start: uBH4E;[f
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK E ekX|*
invoke ExitProcess,NULL @2Z{en?
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> }eSaF@.
end start CO-9-sQx
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BEGIN { print "Hello, world!" } _KLKa/3
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BASIC 9K~X}]u
传统版BASIC(例如GWBASIC): PA&Ev0`+
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op
10 PRINT "Hello, world!" 2w+w'Ag_R
20 END G[ @RZ~o4
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或在提示符输入: h b_"E, `F
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?"Hello, world!":END ]]V|[g&aJ
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现代版BASIC(例如Quick BASIC): (gQP_Oa(
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Print "Hello, world!" 2V:`':
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以下的语句在Quick BASIC中同样有效: ^|hlY]Ev
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? "Hello,world!" Y;-$w|&P>
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3 f@@|vZF
BCPL [0qe ?aI
GET "LIBHDR" QV)>+6\
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LET START () BE kUGOkSP8[
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WRITES ("Hello, world!*N") #oW"3L{,
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-n FKP&P
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Befunge vJ9I z
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C :e1kpQ
#include <stdio.h> sPX&XqWx
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int main(void) BX\/Am11
{ s|IY
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printf("Hello, world!\n"); 6~c#G{kc
return 0; 5C0![$W>
} iR?}^|]
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C++ ]-8WM5\qJM
#include <iostream> @@JyCUd
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int main() |;:g7eb
{ V56WgOBxz
std::cout << "Hello, world!" << std::endl; Yw] 7@
return 0; v{d$DZUs
}
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C++/CLI &S,_Z/BS;
int main() "!+gA&
{ {ETM >
System::Console::WriteLine("Hello, world!"); Lq|>n[KY
} J3 `0i@
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C# (C Sharp) pHT]2e#
class HelloWorldApp H-vHcqFx3
{ 3xT9/8*
public static void Main() .G.WPVE
{ m g,1*B'
System.Console.WriteLine("Hello, world!"); ^/_Yk.w
} T/a=z
} 4-~Z{#-
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COBOL c
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IDENTIFICATION DIVISION. >
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PROGRAM-ID. HELLO-WORLD. >H^#!eaqw
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ENVIRONMENT DIVISION. v3#,Z!
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DATA DIVISION. fuzB;Ea
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PROCEDURE DIVISION. N_IKH)
DISPLAY "Hello, world!". tI1OmhNN
STOP RUN. LH)XD[
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Common Lisp 1W\E`)Z}]
(format t "Hello world!~%") m>%b4M
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DOS批处理 ki?h7
@echo off !!A0K"h
echo "Hello, world!" Q_U.J0
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Eiffel l% T4:p4e
class HELLO_WORLD RWc<CQcL"
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creation SRwD`FF
make Keozn*fzI
feature 'C/yQvJ
make is <XIIT-b[
local qT48Y
io:BASIC_IO Y8zTw`:V
do #0>xa]S
!!io 4);_f
io.put_string("%N Hello, world!") %8,$ILN
end -- make g:>'+(H ;
end -- class HELLO_WORLD &E_a0*)e
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Erlang ikW[lefTq
-module(hello). * :O"R
-export([hello_world/0]). `&M,B=E
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hello_world() -> io:fwrite("Hello, World!\n"). vd{QFJ
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qx t0Jr8
Forth >>
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." Hello, world!" CR BH">#&j[
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Fortran >#w;67he2
WRITE(*,10) |;vQ"8J
10 FORMAT('Hello, World!') SVZocTt
STOP v1TFzcHl<
END #;$]M4
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9 3>4n\
HTML HeOdCr-PN
<HTML> D5TDg\E
<HEAD> c2y,zq|H
<TITLE> Hello World! </TITLE> r3W3;L
</HEAD> 4f([EV[6dK
<BODY> $"r9U|6kk
<p>Hello World!</p> c-sjYJXKM*
</BODY> Q?#I{l)V(
</HTML> 2;8m0+tl
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INTERCAL y0%1YY
PLEASE DO ,1 <- #13 q` q;og
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DO ,1 SUB #1 <- #238 `Mnu<)v
DO ,1 SUB #2 <- #112 5~L]zE
DO ,1 SUB #3 <- #112 9
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DO ,1 SUB #4 <- #0 |A%9c.DG.
DO ,1 SUB #5 <- #64
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DO ,1 SUB #6 <- #238
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DO ,1 SUB #7 <- #26 FACw;/rW
DO ,1 SUB #8 <- #248 i[o 2(d,
DO ,1 SUB #9 <- #168 s6!6Oqh
DO ,1 SUB #10 <- #24 ,#K/+T
DO ,1 SUB #11 <- #16 n0xGIq
DO ,1 SUB #12 <- #158 Oynb"T&8
DO ,1 SUB #13 <- #52 EY,jy]|#
PLEASE READ OUT ,1 ^[M{s(b
PLEASE GIVE UP V'Gal`
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Java F5h/>
public class Hello @^P^-B
{ CKYg!\g(:
public static void main(String[] args) CM;b_E)9)f
{ =p+y$
System.out.println("Hello, world!"); !%iHJwS#
}
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<% WYw#mSp
out.print("Hello, world!"); lW+mH=
%> tt"<1
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MIXAL CXa[%{[n
TERM EQU 19 the MIX console device number 2KlQ[z4Ir
ORIG 1000 start address f"ZlJV a
START OUT MSG(TERM) output data at address MSG $x0SWJ \G
HLT halt execution IH]9%d)
MSG ALF "MIXAL" YX\vk/[|
ALF " HELL" <ql,@*Y
ALF "O WOR" kT%wt1T4
ALF "LD " (l{vlFWd
END START end of the program 5E]t4"
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