“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。 i>=y3x"
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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》。 z~jk_|?|?
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以下是用不同语言写成的Hello World程序的几个例子: %,udZyO3uR
Ada }jL4F$wC
with Ada.Text_Io; use Ada.Text_Io; &Z+.FTo
procedure Hello is NDG?Xs [2
begin djDE0-QxcR
Put_Line ("Hello, world!"); g7K<"Z {M
end Hello; Jx8DVjy
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汇编语言 |YrvY1d!
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x86 CPU,DOS,TASM K` <`l
MODEL SMALL -B:O0;f
IDEAL
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STACK 100H QhPpo#^
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DATASEG ^!K 8nW{*
HW DB 'Hello, world!$' E{'\(6z_
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CODESEG / KKA/
MOV AX, @data A$]#f
MOV DS, AX ^>h2.AJ
MOV DX, OFFSET HW 21~~ =+)X
MOV AH, 09H ;{"uG>#R
INT 21H U5j0i]
MOV AX, 4C00H !6*4^$i#o
INT 21H q/3co86c
END ?WrL<?r)}U
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x86 CPU,GNU/Linux,NASM p5bM/{DP;K
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). z2SR/[I?
;Enter this into "hello.asm" then type: _/F}y[B7d
;"nasm -f elf hello.asm" V V Aw y6
;"ld hello.o -o hello" 9<*<-x{A17
;"./hello" 2*0n#"
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section .data ;data section declaration mtNB09E(
msg db 'Hello World!',0AH 62>/0_m5
len equ $-msg ;string length L$}'6y/@
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section .text ;code section declaration @Hst-H.l<l
global _start ;entry point (start of execution) &-ZRS/_d>
_start: mov edx,len ;string length C]
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mov ecx,msg ;string start $)7Af6xD
mov ebx,1 ;file handle: stdout 2spK#0n.HV
mov eax,4 ;sys_write CfHPJ:Qo[
int 80h ;kernel system call 'h{DjNSM
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mov ebx,0 ;return value V(n3W=#kky
mov eax,1 ;sys_exit $+HS^m
int 80h ;kernel system call 4\2~wSr
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s9Bd mD^|#
x86 CPU,Windows,MASM32 _P{v=`]Eu
.386 f{#Mc
.model flat,stdcall ,CnUQx0
option casemap:none /Pa<I^-#
;Include 文件定义 90+Hv:wF
include windows.inc Jv:|J
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include user32.inc t($z+C<
includelib user32.lib 6 bt{j
include kernel32.inc BC1P3Sk
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includelib kernel32.lib %(kf#[zQ
;数据段 K#plSD^f=
.data +,bgOq\aG
szCaption db 'A MessageBox!',0 LP}YHW/
szText db 'Hello,world!',0 3hNb
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;代码段 :n(!,
.code m{0u+obi&w
start: JT 5+d ,
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK e
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invoke ExitProcess,NULL n/GJ&qLi:g
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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end start vX}mwK8
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BEGIN { print "Hello, world!" } &bS!>_9
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BASIC ~7&O[
传统版BASIC(例如GWBASIC): 58_aI?~>>
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10 PRINT "Hello, world!" 2v\-xg%1
20 END SQx:`{O
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或在提示符输入: -X#qW"92q
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?"Hello, world!":END XY`2>7
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现代版BASIC(例如Quick BASIC): 9:6d,^X
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Print "Hello, world!" N_>}UhZ
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以下的语句在Quick BASIC中同样有效: 7q:
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? "Hello,world!" (3Z~EIZz
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BCPL MBH/,Yd
GET "LIBHDR" &b&o];a
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LET START () BE vR"<:r47?
$( hTbot^/
WRITES ("Hello, world!*N") q CB9z
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Befunge T?E[LzZg
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+++++++++++++++.>.+++.------.--------.>+.>. *d/]-JN,K
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C ;]^JUmxU[d
#include <stdio.h> ^@..\X9
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int main(void) mg^\"GC*8
{ #`H^8/!e
printf("Hello, world!\n"); wh;E\^',n
return 0; in6iJ*E@'
} L)ry!BuHI
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C++ v{2Vg
#include <iostream> ^~dvA)bH
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int main() ~X
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{ v+Q#O[
std::cout << "Hello, world!" << std::endl; g#ONtY@*U
return 0; F-n1J?4b
} AFSFXPl
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C++/CLI BO p&s>hI
int main() {XNu4d9w(
{
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System::Console::WriteLine("Hello, world!"); q}["Nww-
} jTx,5s-
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C# (C Sharp) ynN[N(m#
class HelloWorldApp 1xo<V5
{ prY9SQd
public static void Main() ]X)EO49
{ ^$y_~z3o#7
System.Console.WriteLine("Hello, world!"); BE}qwP^
} lA<IcW
} W$Bx?}x($
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COBOL .W&rcqy
IDENTIFICATION DIVISION. <ZNa`
PROGRAM-ID. HELLO-WORLD. m H'jr$ ?
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ENVIRONMENT DIVISION. +:[dviyPt
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DATA DIVISION. ;D[b25
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PROCEDURE DIVISION. 5\tYs=>b<
DISPLAY "Hello, world!". yXw xq(32
STOP RUN. BI=Ie?
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Common Lisp m-a_<xo
(format t "Hello world!~%") ?^&!/,
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DOS批处理 z@ A5t4+3
@echo off E4[\lX$J
echo "Hello, world!" 9=I(AYG{m
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Eiffel 9ffRY,1@
class HELLO_WORLD nx,67u/Pb
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creation >|7&hj$
make zT~ GBC-IX
feature 1)NX;CN
make is (vjQF$Hp
local VPg`vI$(X
io:BASIC_IO *(d^k;
do &^9>h/-XT
!!io M)EUR0>8
io.put_string("%N Hello, world!") 9&'Mb[C`"
end -- make v(4C?vxhG
end -- class HELLO_WORLD ( L RX
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Erlang c e=6EYl
-module(hello). ASy7")5
-export([hello_world/0]). zAB-kE\)
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hello_world() -> io:fwrite("Hello, World!\n"). qg6Hk:^r
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Forth jO:<"l^+u
." Hello, world!" CR =$Q3!bJ
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Fortran "Jnq~7]
WRITE(*,10) ? *I9
10 FORMAT('Hello, World!') W.:kE|a.g
STOP %v~j10e
END dt3Vy*zL
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HTML on&N=TN
<HTML> 2#W%--
<HEAD> Z{_'V+Q1
<TITLE> Hello World! </TITLE> Qn%*kU0X
</HEAD> 5I(`
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<BODY> )_2!1
<p>Hello World!</p> 'A8T.BU
</BODY> Cfz1\a&V{
</HTML> ]\r~"*TZ
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INTERCAL aeBth{
PLEASE DO ,1 <- #13 4VU5}"<
DO ,1 SUB #1 <- #238 ~Nc]`95
DO ,1 SUB #2 <- #112 "hlIGJ?_=
DO ,1 SUB #3 <- #112 bR&hI9`%F
DO ,1 SUB #4 <- #0 \HK#d1>ox
DO ,1 SUB #5 <- #64 :f/ p5c
DO ,1 SUB #6 <- #238 ^ACp_RM
DO ,1 SUB #7 <- #26 ax>c&%vo
DO ,1 SUB #8 <- #248 @fE^w^K7
DO ,1 SUB #9 <- #168 cF vGpZ
DO ,1 SUB #10 <- #24 Gh{k ~/B
DO ,1 SUB #11 <- #16 ki+9Ln;
DO ,1 SUB #12 <- #158 5&9(d_#H
DO ,1 SUB #13 <- #52 {8B\-LUR
PLEASE READ OUT ,1 J$WIF&*0@
PLEASE GIVE UP &