“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。 OvH:3"Sdy
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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》。 TX)W.2u=
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以下是用不同语言写成的Hello World程序的几个例子: Q#MB=:0{
Ada 4!sK>l!
with Ada.Text_Io; use Ada.Text_Io; &l6@C3N$
procedure Hello is K6{wM
begin D5gj*/"
Put_Line ("Hello, world!"); |q3X#s72
end Hello; NuOA'e+i
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汇编语言 ,#;hI{E
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x86 CPU,DOS,TASM <F^9ML+'
MODEL SMALL
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IDEAL Y:CX RU6eD
STACK 100H l8~(bq1
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DATASEG ~vTwuc\(H
HW DB 'Hello, world!$' eEXNEgbn
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CODESEG -9vNV:c
MOV AX, @data U\%r33L )
MOV DS, AX RUY7Y?
MOV DX, OFFSET HW O=__w *<
MOV AH, 09H ")KqPD6k
INT 21H !-M Y<'
MOV AX, 4C00H `BmnXWMgx
INT 21H YCRE- 5!
END y`9#zYgqA
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x86 CPU,GNU/Linux,NASM ]9_gbQ
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). eipg,EI
;Enter this into "hello.asm" then type: +-tFg XG
;"nasm -f elf hello.asm" +cfcr*
;"ld hello.o -o hello" 8SpG/gl"
;"./hello" { <Gyjq
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section .data ;data section declaration qu^g~"s
msg db 'Hello World!',0AH #^$_/Q#C
len equ $-msg ;string length ]RAh['u|
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section .text ;code section declaration _1[Wv?
global _start ;entry point (start of execution) A~xw:[zy$a
_start: mov edx,len ;string length =rymd3/
mov ecx,msg ;string start 0
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mov ebx,1 ;file handle: stdout RP$u/x"b
mov eax,4 ;sys_write '( I0VJJ
int 80h ;kernel system call ZK;/~9KU
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mov ebx,0 ;return value % PzkV s
mov eax,1 ;sys_exit Z*M{
int 80h ;kernel system call Jqb~RP~
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x86 CPU,Windows,MASM32 ~QSX 1w"
.386 e?XFtIj$
.model flat,stdcall "BsK'yo.
option casemap:none nA0%M1a
;Include 文件定义 (Y'cxwj%
include windows.inc IP/%=m)\%
include user32.inc ?98!2:'{9
includelib user32.lib 2d*bF.
include kernel32.inc g8cBb5(L
includelib kernel32.lib
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;数据段 dnomnY(*<
.data JPn)Op6
szCaption db 'A MessageBox!',0 zG$5g^J
szText db 'Hello,world!',0 D\G.p |9=
;代码段 /a*){JQ5j
.code F. U@8lr
start: $B8Vg `+
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ^?RH<z
invoke ExitProcess,NULL ~ 1;M4K
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |8f }3R 9
end start 8#;=>m%
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/-v ;
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BEGIN { print "Hello, world!" } |!]
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BASIC ~;9n6U
传统版BASIC(例如GWBASIC): {@CQ
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10 PRINT "Hello, world!" <Q(E {c3"
20 END ^2}HF/
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或在提示符输入: M~\dvJ$cH
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?"Hello, world!":END hu$eO'M_
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现代版BASIC(例如Quick BASIC): ?PWg
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Print "Hello, world!" #I?Z,;DI=
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以下的语句在Quick BASIC中同样有效: EF!J#N2
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? "Hello,world!" y>}r
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BCPL @Dfg6<0
GET "LIBHDR" YIwa = ^
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LET START () BE vD@|]@gq
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WRITES ("Hello, world!*N") x?o#}:S
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Befunge UstUPO
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#include <stdio.h> ZN#b5I2Pf
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int main(void) Q&.uL}R
{ oaqH@`
printf("Hello, world!\n"); :.ZWYze
return 0; d~qQ_2M[G
} chL1r9V)v
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C++ Op-z"inw
#include <iostream> x7/Vf,N
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int main() Ur#jJR@%3
{ A9b(P[!]T:
std::cout << "Hello, world!" << std::endl; ^+D/59I
return 0; nC p/.]Y*
} RJ@79L*#
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C++/CLI 7*uN[g#p
int main() pL1ABvBB
{ t9U6\ru
System::Console::WriteLine("Hello, world!"); ]0* aE
} ^g*Sy, A
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C# (C Sharp) Zb=NcEPGy
class HelloWorldApp Y:;_R=M
{ se %#U40*
public static void Main() `[5xncZ-
{ GKIzU^f
System.Console.WriteLine("Hello, world!"); g@^ y$wt
} >
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} pRV.\*:c
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COBOL AVQcD`V3B
IDENTIFICATION DIVISION. k_]'?f7Z
PROGRAM-ID. HELLO-WORLD. ^ slIR!L
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ENVIRONMENT DIVISION. 5%\K
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DATA DIVISION. E~}H,*)
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PROCEDURE DIVISION. o4p5`jOG@
DISPLAY "Hello, world!". c;]\$#2
STOP RUN. mbbhz,
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Common Lisp e=VSO!(rY
(format t "Hello world!~%") \2 DED
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DOS批处理 /E<Q_/'Z
@echo off o=Z:0Ukl]
echo "Hello, world!" E|;>!MMA;
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Eiffel @Dsw.@/
class HELLO_WORLD \uHC 9}0
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creation u|wl;+.
make bJMsB|r
feature k^d]E F
make is 8g8eY pG
local $)*qoV
io:BASIC_IO ^!^M Gzu
do :7X4VHw/
!!io ^E/6vG
io.put_string("%N Hello, world!") b&yuy
end -- make -`5]%.E&8
end -- class HELLO_WORLD C1f$^N
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Erlang \1<aBgKi
-module(hello). <[ dt2)%L>
-export([hello_world/0]). " TCJT390
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hello_world() -> io:fwrite("Hello, World!\n"). _}47U7s8
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Forth <=|^\r
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." Hello, world!" CR 1:<n(?5JI
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Fortran 7@ONCG
WRITE(*,10) j9c:SP5
10 FORMAT('Hello, World!') q<.k:v&
STOP U^[AW$WzU
END i;~.kgtq4
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HTML 5+{oQs_
<HTML> 5xKod0bA
<HEAD> pFMJG<W9,
<TITLE> Hello World! </TITLE> OD[=fR|cp
</HEAD> U&(gNuR>J
<BODY> O=}
<p>Hello World!</p> p5rq>&"
</BODY> 93Gj#Mk
</HTML> IIMf\JdM
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PLEASE DO ,1 <- #13 KgYQxEbIW
DO ,1 SUB #1 <- #238 3bGU;2~}
DO ,1 SUB #2 <- #112 /AX)n:,
DO ,1 SUB #3 <- #112 CEkf0%YJ
DO ,1 SUB #4 <- #0 p) ;[;S
DO ,1 SUB #5 <- #64 d\Up6F
DO ,1 SUB #6 <- #238 ,b^jAzow
DO ,1 SUB #7 <- #26 B:i$
DO ,1 SUB #8 <- #248 P;XA|`&
DO ,1 SUB #9 <- #168 WllQM,h
DO ,1 SUB #10 <- #24 p:tp|/
DO ,1 SUB #11 <- #16 'Kmf6iK>[
DO ,1 SUB #12 <- #158 jEx8G3EL
DO ,1 SUB #13 <- #52 ' p!&&.%
PLEASE READ OUT ,1 4+>~Ui_#
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Java SsMs#C8u%
public class Hello R'F \9eyA
{ -{A64gfFxT
public static void main(String[] args) Xeja\5zB
{ zGd[sjL
System.out.println("Hello, world!"); !RLXB$@`
} |jH Yf42Q
} _o?aO C
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out.print("Hello, world!"); YJz06E1 -9
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