“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。 =_d%=m
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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》。 &7 [[h+Lb
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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< *8<Oo4g
Ada ?p^2Z6J'$
with Ada.Text_Io; use Ada.Text_Io; 8tc*.H{^+
procedure Hello is ygViPz<J
begin y\PxR708
Put_Line ("Hello, world!"); ;A#~`P
end Hello; `/:cfP\
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汇编语言 bXdY\&fE
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x86 CPU,DOS,TASM 9){
MODEL SMALL 3Sh+u>w
IDEAL _<Dt
z
STACK 100H (JZ".En#X
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DATASEG o/p-!
HW DB 'Hello, world!$' 8l)
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CODESEG 49h0^;xlo:
MOV AX, @data ef]B9J~h
MOV DS, AX Ijo(^v@
MOV DX, OFFSET HW .[j%sGdKl
MOV AH, 09H Pl
INT 21H ImkrV{,e
MOV AX, 4C00H ME+em1ZH
INT 21H Y1\K;;X
END r6Nm!Bq7
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x86 CPU,GNU/Linux,NASM 2p< Aj!
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). iuAq.$oi{
;Enter this into "hello.asm" then type: Rlw3!]5+2
;"nasm -f elf hello.asm" Z^_>A)<s<
;"ld hello.o -o hello" Ft-6m%
;"./hello" ElR)Gd_ 8
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section .data ;data section declaration <r\I"z$
msg db 'Hello World!',0AH oXGZK5w<l
len equ $-msg ;string length H5M#q6`H6
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section .text ;code section declaration #A<"4#}
global _start ;entry point (start of execution) /lH'hcXcX
_start: mov edx,len ;string length pj|X]4?wdI
mov ecx,msg ;string start <GZhH:
mov ebx,1 ;file handle: stdout 36A;!1
mov eax,4 ;sys_write p\D >z("
int 80h ;kernel system call rc{o?U'^-
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mov ebx,0 ;return value Zu#<
mov eax,1 ;sys_exit Ay$>(;
int 80h ;kernel system call u,9q<&,
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x86 CPU,Windows,MASM32 J(9=T<%T
.386 p_6P`Yx^e
.model flat,stdcall A*0*sZ0
option casemap:none {ymb\$f
;Include 文件定义 r{ @ `o@q
include windows.inc (%DRt4u<H
include user32.inc =K'L|QKF
includelib user32.lib O),I[kb
include kernel32.inc vLn> 4SK
includelib kernel32.lib >q9{
;数据段 0k1MKzi Q
.data z,+m[x=/N
szCaption db 'A MessageBox!',0 r)B3es&&
szText db 'Hello,world!',0 1N.tQ^
;代码段 !: |nI77|
.code ` d`&R.'
start: fM:80bnL+
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 2OC dG
invoke ExitProcess,NULL ^5x4 q
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> n\>.T[$"
end start 2"M_sL
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@ ;J|xkJ
AWK 'j#a%j@{
BEGIN { print "Hello, world!" } \+]O*Bm&`8
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BASIC /v$]X4 S`
传统版BASIC(例如GWBASIC): vKkf2 7
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10 PRINT "Hello, world!" =t.F2'<[Z
20 END L>:FGNf^H
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或在提示符输入: S7#0*2#[o
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?"Hello, world!":END `~E<Sf<M
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现代版BASIC(例如Quick BASIC): ?h&l
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Print "Hello, world!" UJwq n"Q^
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以下的语句在Quick BASIC中同样有效: AeQC:
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? "Hello,world!" !F,s"
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BCPL z1qUz7
GET "LIBHDR" 05 g?jV
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LET START () BE vGyppm[0
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WRITES ("Hello, world!*N") cJV!>0ua
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Befunge ]E..43
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Brainfuck jL2MW(d^Q
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< T-!|l7V~f
+++++++++++++++.>.+++.------.--------.>+.>. N$*>suQ,
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#include <stdio.h> uTUa4^]*
cnYYs d{
int main(void) C}bPv+t
{ *fOIq88
printf("Hello, world!\n"); DW4MA<UQ
return 0; ls]Elo8h1f
} >:fJhF@
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C++ *IVD/9/
#include <iostream> ^
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int main() GMt)}Hz
{ Ic_t c
std::cout << "Hello, world!" << std::endl; f`bIQ 9R
return 0; 2/UI>@By
} =b|)Wnt2f
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C++/CLI HMFl/%z
int main() RNl\`>Cz
{ r)(i{:@r`
System::Console::WriteLine("Hello, world!"); X%*brl$D
} _{3k+DQ
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C# (C Sharp) &0FpP&Z(
class HelloWorldApp h^Arb=I
{ Sk!v,gx
public static void Main() =/M$
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{ zww?
System.Console.WriteLine("Hello, world!"); R^F7a0"
} !~Ax
} |UABar b
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COBOL H,/~=d:
^
IDENTIFICATION DIVISION. /{49I,
PROGRAM-ID. HELLO-WORLD. [%7IQ4`{
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ENVIRONMENT DIVISION. 8UjCX[v
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DATA DIVISION. xu0;a
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PROCEDURE DIVISION. 5mDVFb 3a
DISPLAY "Hello, world!". ]i9H_K
STOP RUN. CvgPIrl
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/5a$@%
Common Lisp tP/GDC;
(format t "Hello world!~%") cob9hj#&7
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DOS批处理 I67k M{V
@echo off la!1[VeL
echo "Hello, world!" 0W!VV=j<}
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Eiffel >Lo6='G
class HELLO_WORLD :qt82tbn
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creation ?tW%"S^D
make 6kgCS{MZ
feature 6~>^pkV
make is rjhs?
local 'Y,+D`&i)
io:BASIC_IO )< X=z
do 3ZT/>a>@
!!io 0e[ tKn(
io.put_string("%N Hello, world!") 5)/4)0
end -- make c"oQ/x
end -- class HELLO_WORLD \=
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Erlang ROlzs}
-module(hello). 38zR\@'j]4
-export([hello_world/0]). :y<Cd[/
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hello_world() -> io:fwrite("Hello, World!\n"). t*ri`}a{v
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Forth #8WR{
." Hello, world!" CR a78;\{&L'
c +"O\j'
PW~cqo B71
Fortran .q~,.yI&j
WRITE(*,10) RBHqLg(
10 FORMAT('Hello, World!') & y 2GQJE
STOP }lrfO_
END CU}
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K!$\REs
HTML y.TdWnXx
<HTML> PHE;
<HEAD> +9=p*3cnp
<TITLE> Hello World! </TITLE> 3XYIb Xnk
</HEAD> yE!7`c.[u
<BODY> Xs#?~~"aC
<p>Hello World!</p> gFH;bZU
</BODY> q%)*,I<
</HTML> =~(L JPo6
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INTERCAL &<[]X@ bY
PLEASE DO ,1 <- #13 qjdahVY
DO ,1 SUB #1 <- #238 &p(*i@Ms
DO ,1 SUB #2 <- #112 qH}62DP3
DO ,1 SUB #3 <- #112 ?><
DO ,1 SUB #4 <- #0 lD+y,";
DO ,1 SUB #5 <- #64 da7x 1n$D
DO ,1 SUB #6 <- #238 6:7:NI l:
DO ,1 SUB #7 <- #26 h&^/, G
DO ,1 SUB #8 <- #248 A16-
DO ,1 SUB #9 <- #168 o*5e14W(:
DO ,1 SUB #10 <- #24 R}K5'`[%ZY
DO ,1 SUB #11 <- #16 G~mB=]
DO ,1 SUB #12 <- #158 El8.D3
DO ,1 SUB #13 <- #52 Lqf#,J
PLEASE READ OUT ,1 83O^e&Bt
PLEASE GIVE UP pCud`
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Java cJp1 <R
public class Hello Dv\:b*
{ 1.cUolnr
public static void main(String[] args) lhvZ*[[<)
{ Fr Q-v]c
System.out.println("Hello, world!"); D9pxe qf+=
} w7]p9B
} [.yx2@W
PrYWha=c-
@"#gO:|[i0
JSP Wb-'E%K
<% '~vSH9nx/
out.print("Hello, world!"); 1:~m)"?I_^
%> p<^/T,&I
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