“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。 L}lc=\
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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》。 oIQor%z
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以下是用不同语言写成的Hello World程序的几个例子: kc1 *@<L6
Ada ].7)^
with Ada.Text_Io; use Ada.Text_Io; =/Vr,y$
procedure Hello is >eW HPO
begin gj$gqO`B
Put_Line ("Hello, world!"); PHT;%;m=
end Hello; !@p@u;djJ
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汇编语言 y85GKysT
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x86 CPU,DOS,TASM "((6)U#
MODEL SMALL htkn#s~=
IDEAL s:i$ s")
STACK 100H (B7M*e
f:=q=i
DATASEG }V6}>!Sb
HW DB 'Hello, world!$' 9iUkvnphh
|JnJ=@-y
CODESEG 6 @'v6 1'
MOV AX, @data QR\qGhQ~
MOV DS, AX enDjP
MOV DX, OFFSET HW OAc+LdT
MOV AH, 09H ;,'eO i
INT 21H $l 0^2o=
MOV AX, 4C00H haqL
DVrf
INT 21H j""u:l^+x
END &AoXv`l4
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x86 CPU,GNU/Linux,NASM oypX.nye_
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ft?J|AG
;Enter this into "hello.asm" then type: pV<18CaJ
;"nasm -f elf hello.asm" !pQQkZol
;"ld hello.o -o hello" jbMzcn~ehI
;"./hello" pn{Nk1Pl
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section .data ;data section declaration +*lSB%`aS
msg db 'Hello World!',0AH WSW aq\9]8
len equ $-msg ;string length ro|dB
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section .text ;code section declaration m7~kRY514
global _start ;entry point (start of execution) ]@C&Q,~q
_start: mov edx,len ;string length v>;6pcp[F
mov ecx,msg ;string start $:{uF#
mov ebx,1 ;file handle: stdout J XbG|L
mov eax,4 ;sys_write ) zz"DH
int 80h ;kernel system call z;2kKQZm
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mov ebx,0 ;return value bTb|@
mov eax,1 ;sys_exit lk)38.
int 80h ;kernel system call nH/V2>Lm
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x86 CPU,Windows,MASM32 rcY[jF
.386 [8l8m6
.model flat,stdcall W7_X=>l
option casemap:none #L`@["
;Include 文件定义 A)/_:
include windows.inc QUH USDT
include user32.inc <t.yn\G-w
includelib user32.lib m!tB;:6
include kernel32.inc @m<xpel
includelib kernel32.lib 3l-8TR
;数据段 bmGIxBRq
.data o/)]z
szCaption db 'A MessageBox!',0 "2o)1G
szText db 'Hello,world!',0 ")i4w{_y
;代码段 pbl;n|
.code E&7U |$
start: [59_n{S 1
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 5)AMl)
invoke ExitProcess,NULL &Plc
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ?qO_t;:0>
end start X8GIRL)lJ
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AWK &?#V*-;^
BEGIN { print "Hello, world!" } '[I?G6
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BASIC F$^RM3
传统版BASIC(例如GWBASIC): es6!p 7p?
}[ld=9p(
10 PRINT "Hello, world!" l*e*jA_>:7
20 END a[1^)=/DM
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或在提示符输入: 9B{,q6
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?"Hello, world!":END >h(n8wTP
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现代版BASIC(例如Quick BASIC): bLhTgss](
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Print "Hello, world!" b>er 'U
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以下的语句在Quick BASIC中同样有效: xVfAlN37(
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? "Hello,world!" RpOGY{[)[
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sC(IeGbX
BCPL $^?Mip
GET "LIBHDR" Y[R veF
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LET START () BE X3-pj<JLY
$( b8r?Dd"T8
WRITES ("Hello, world!*N") hs!a'E
$) ;}@.E@s%'
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Befunge nm`[\3R
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, K`{P/w
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jhgS@g=@ZC
Brainfuck UyTsUkY
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 6!*be|<&
+++++++++++++++.>.+++.------.--------.>+.>. IW?).%F
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C K!Te*?b
#include <stdio.h> 2Tec#eYe
SR!EQ<
int main(void) _2xNio&
{ -K eoq
printf("Hello, world!\n"); Kkcb'aDR
return 0; m!Cvd9X=
} }Go?j#
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C++ H=RzY-\a%
#include <iostream> LeRyS]
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int main() Z}#'.y\ f
{ %A64AJZ
std::cout << "Hello, world!" << std::endl; KSDz3qe
return 0; ~"|MwR!0
} `?E|frz[
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h;cl+c|B
C++/CLI -FpZZ8=,M2
int main() -@L7!,j
{ tg-U x
System::Console::WriteLine("Hello, world!"); IJa6W`}
} 17P5Dr&
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C# (C Sharp) J=7.-R|t
class HelloWorldApp u_H=Xm)9
{ Z*/{^ zsE
public static void Main() -Pt.
{ \]<eLw-v
System.Console.WriteLine("Hello, world!"); ]8@s+N
} qW+'#Jh@TV
} Iue}AGxu:{
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C2}n &{T
COBOL V6Z~#=EQ
IDENTIFICATION DIVISION. $~7uDq
PROGRAM-ID. HELLO-WORLD. 3 @a hN2
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ENVIRONMENT DIVISION. dhrh "x_?:
b3.
DATA DIVISION. ;>hRj!
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PROCEDURE DIVISION. ,5V w^@F
DISPLAY "Hello, world!". |"}oGL6-
STOP RUN. pPL)!=o!
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Common Lisp '3<T~t
(format t "Hello world!~%") GmhfBW?
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DOS批处理 i4T=4q
@echo off n( RQre
echo "Hello, world!" #qLsAw--Q
mrmm@?
^_\S)P2c
Eiffel \-Vja{J]
class HELLO_WORLD H(?)v.%
Ec/&?|$
creation .*}!XKp0j
make ^?M# |>
feature )[b\wrc
make is M$u.lI
local ='A VI-go5
io:BASIC_IO <+y%k~("
do "m#17J_
!!io m^!Kthq
io.put_string("%N Hello, world!") 0<i8
;2KD
end -- make 0oK_u Y
4g
end -- class HELLO_WORLD >}T}^F
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Erlang kB`
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-module(hello). E] 6]c!2:
-export([hello_world/0]). $^:s)Yv
a =
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hello_world() -> io:fwrite("Hello, World!\n"). Ztl?*zL
MJ"@
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Forth b>h
L*9
." Hello, world!" CR gmqA 5W~y
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'XJqh|G
Fortran LZtO Q__B)
WRITE(*,10) E"%dO
10 FORMAT('Hello, World!') |LV}kG(2
STOP t:x"]K
END C/?x`2'
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n'To:
HTML a B$x(8pP@
<HTML> DD5cUlOSu
<HEAD> LpK? C<?x
<TITLE> Hello World! </TITLE> >P+oNY
</HEAD> VTUSM{TC
<BODY> uc{s\_
<p>Hello World!</p> Pm7lP5
</BODY> 7}1Z7"?
</HTML> Tnv,$KOhs
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ac
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INTERCAL .],:pL9d
PLEASE DO ,1 <- #13 *Sg6VGP
DO ,1 SUB #1 <- #238 4|&_i)S-Y
DO ,1 SUB #2 <- #112 ::p%R@?
DO ,1 SUB #3 <- #112 f
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DO ,1 SUB #4 <- #0 7@R^B =pb
DO ,1 SUB #5 <- #64 B&QEt[=s
DO ,1 SUB #6 <- #238 6&+}Hhe
DO ,1 SUB #7 <- #26 ;Q8`5h
DO ,1 SUB #8 <- #248 i>7]9gBm1q
DO ,1 SUB #9 <- #168 X2|&\G9c
DO ,1 SUB #10 <- #24 \3&