“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。 e>/PW&Z8Z
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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》。 ]M.ufbg uq
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以下是用不同语言写成的Hello World程序的几个例子: ]GJskBm
Ada MEE]6nU
with Ada.Text_Io; use Ada.Text_Io; LYT0 XB)A
procedure Hello is 'yl`0,3wV
begin .[7m4iJf
Put_Line ("Hello, world!"); Kgcg:r:
end Hello; `C3F?Lch
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汇编语言 ,+XQ!y%
vjW S35i
x86 CPU,DOS,TASM 1'h?qv^(
MODEL SMALL `eA 0Z:`g!
IDEAL
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STACK 100H &}WSfZ0{
*ood3M[M^
DATASEG vg<_U&N=-r
HW DB 'Hello, world!$' qzq>C"z\Y$
u >x2
CODESEG >%{h_5
MOV AX, @data 3.soCyxmc
MOV DS, AX ,ua]h8
MOV DX, OFFSET HW :t(}h!7
MOV AH, 09H 6;ICX2Wq'
INT 21H W /IyF){
MOV AX, 4C00H 8<xJmcTEwO
INT 21H 3+IS7ATn
END ~{xY{qL
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p[cC%3
x86 CPU,GNU/Linux,NASM fZgZ
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Te;`-EL
;Enter this into "hello.asm" then type: p!=/a)4X
;"nasm -f elf hello.asm" u4%-e)$X
;"ld hello.o -o hello" -)w/nq
;"./hello" UJO+7h'
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section .data ;data section declaration "w N
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msg db 'Hello World!',0AH !r$/-8b
len equ $-msg ;string length oo`mVRVf
/@q_`tU
section .text ;code section declaration $L(,q!DvH
global _start ;entry point (start of execution) B<i1UJ5
_start: mov edx,len ;string length =r`>tWs
mov ecx,msg ;string start X)\t=><<
mov ebx,1 ;file handle: stdout *5wb8[
mov eax,4 ;sys_write yQ\c<z^e
int 80h ;kernel system call rN
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=5+:<e,&
mov ebx,0 ;return value M}HGFN
mov eax,1 ;sys_exit 8I
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int 80h ;kernel system call N'IzHyo.
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u)%J5TR .Y
x86 CPU,Windows,MASM32 By%aTuV$
.386 M>-x\[n+
.model flat,stdcall yhZ 2-*pTg
option casemap:none hD
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;Include 文件定义 6*CvRb&
include windows.inc s3oK[:/
include user32.inc (T,ST3{*k
includelib user32.lib znD0&CS9q
include kernel32.inc (.Sj"6+
includelib kernel32.lib .7{,u1N'
;数据段 R9k
Z#
.data l{6fR(d ?
szCaption db 'A MessageBox!',0 (tys7og$'
szText db 'Hello,world!',0 _K'YaZTa;~
;代码段 ,9=5.+AJ
.code fAXF_wj
start: g+U6E6}1
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK @r=O~x
invoke ExitProcess,NULL 64Q{YuI
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> rcAx3AK.
end start
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BEGIN { print "Hello, world!" } rqSeh/<iD
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whr[rWt@>
BASIC _A1r6
传统版BASIC(例如GWBASIC): 1#6c
sZW5
]v$VZ'
10 PRINT "Hello, world!" eWE7>kwh
20 END W
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或在提示符输入: .*i.Z
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?"Hello, world!":END Sw%^&*J
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现代版BASIC(例如Quick BASIC): FZO}+ P
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Print "Hello, world!" WQK ~;GV-
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以下的语句在Quick BASIC中同样有效: V& _
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? "Hello,world!" )$XcO]
PS**d$ S
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BCPL 7
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GET "LIBHDR" W:'H&`0
G*JasHFs
LET START () BE wa2?%y_G
$( 7\H jQ7__
WRITES ("Hello, world!*N") :;HJ3V;
$) t,Ss3
7M7sq-n5z
LB$#]
Z
Befunge Z7J8%ywQ
"!dlrow olleH">v gd#+N]C_
, @T)kqT
^_@ `r+zNJ@q
~nDbWv"
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Brainfuck 9bwG3jn4?
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 8`Ih>
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+++++++++++++++.>.+++.------.--------.>+.>. [3o^06V8j
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C Tmjcc(
#include <stdio.h> h6`v%7H?
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int main(void) .Yg7V'R1
{ +6-_9qRq
printf("Hello, world!\n"); 1 UdET#\
return 0; ~+
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} 1L3+KD~
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oR[-F+__
C++ yI$KBx/]n
#include <iostream> 3e,"B
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int main() ;#)sV2F\&
{ +7E&IK
std::cout << "Hello, world!" << std::endl; C)hS^D:
return 0; 7!F<Uf,V3
} l^!raoH]q
= Zi'L48
1#}}:
C++/CLI &1 t84p:^=
int main() ]?c9;U
{ 1{15#W
System::Console::WriteLine("Hello, world!"); S3Dmc\f
} h\-3Y U
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7fE U5@
C# (C Sharp) ;V v.$mI
class HelloWorldApp y8%QS*
{ tK7v&[cI
public static void Main() *{<460`!q
{ w Dp5HZ>
System.Console.WriteLine("Hello, world!"); rUn1*KWbE
} $-AG$1
} ,)?!p_*@:
L+K,Y:D!W
Tji* \<?
COBOL y?OK#,j
IDENTIFICATION DIVISION. 'u}OeS"f
PROGRAM-ID. HELLO-WORLD. ze"`5z26|
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ENVIRONMENT DIVISION. F,}7rhY(U^
<]Btx;}
DATA DIVISION. B}fd#dr
Fzmc#?
PROCEDURE DIVISION. _*wkTI+j
DISPLAY "Hello, world!". /`s{!t#Y
STOP RUN. aO&!Y\=@
5J~@jPU
o#uhPUZ
Common Lisp U2G[uDa;
(format t "Hello world!~%") 2=,O)g
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7x=-1wbi
DOS批处理 __%){j6
@echo off 3;?DKRIcX
echo "Hello, world!" Q3<ctd\]Y
l3N '@GO
bt=z6*C>A
Eiffel Rt.2]eZEJ
class HELLO_WORLD |\FJ
\ORE;pG
creation 6DVHJ+WTV
make ?G>E[!8ev
feature blx"WVqo
make is B,b^_4XX$
local Lky T4HC8n
io:BASIC_IO sW]>#e
do X"!tx
!!io EG!Nsb^,
io.put_string("%N Hello, world!") "M}3T?0 O
end -- make yYH>~,
end -- class HELLO_WORLD w!r.MWE
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~P fk
Erlang tq=7HM
-module(hello). w&eq
*q
-export([hello_world/0]). |33_="
{Q021*xt/
hello_world() -> io:fwrite("Hello, World!\n"). bQ`2ll*(
M~U>"kX
0ky3rFSh1
Forth }hA)p:
." Hello, world!" CR Lvb'qZ6n
h'B0rVQia>
ffy,ds_7
Fortran g?rK&UTU
WRITE(*,10) a\m0X@Q
10 FORMAT('Hello, World!') ,a3M*}Y~3
STOP \SooIEl@
END PG{"GiZz=
Zt \3y
Y;=GM:*H
HTML ]#;u]
<HTML> kS62]v]
<HEAD> F%I*m^7d
<TITLE> Hello World! </TITLE> uQl=?085
</HEAD> Rhzcm`"
<BODY> PTpGZ2FZ
<p>Hello World!</p> PNpH)'C|
</BODY> {#N,&?[
</HTML> H<Zs2DP`
N&G;`
GrA}T` ]
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H %'MR;hQsd8
.*Axr\x3
mW)C=X%
INTERCAL |!cM_&
PLEASE DO ,1 <- #13 eC='[W<a.
DO ,1 SUB #1 <- #238 b
v4
DO ,1 SUB #2 <- #112 &4m;9<8\
DO ,1 SUB #3 <- #112 MtG~O;?8
DO ,1 SUB #4 <- #0 rsD?
;XzH
DO ,1 SUB #5 <- #64 JqK-vvI
DO ,1 SUB #6 <- #238 Zr|\T7w 3
DO ,1 SUB #7 <- #26 T^@P.zX
DO ,1 SUB #8 <- #248 `aL4YH-v
DO ,1 SUB #9 <- #168 `L
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DO ,1 SUB #10 <- #24 |?LUt@r;
DO ,1 SUB #11 <- #16 VrKFpFd
DO ,1 SUB #12 <- #158 l(3\ekU!
DO ,1 SUB #13 <- #52 ]Z>zf]<
PLEASE READ OUT ,1 :@,UPc-+
PLEASE GIVE UP @rlL'|&X*
\GCT3$
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Java J%P{/ nR
public class Hello X?SLYm@v
{
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public static void main(String[] args) -v~XS-F
{ O7xBMqMf
System.out.println("Hello, world!"); }4_c~)9Q
} D n}TO*
} 7jPn6uz>w
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78O5$?b;#
JSP *oru;=D@8
<% H8$";T(I
out.print("Hello, world!"); |"Fm<