“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。 jiA5oX^g
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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》。 `ICcaRIN8I
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以下是用不同语言写成的Hello World程序的几个例子: f?=r3/AO
Ada ,J~,ga~
with Ada.Text_Io; use Ada.Text_Io; CB*`
procedure Hello is wJ80};!
begin v Q-ixh
Put_Line ("Hello, world!"); e9~cBG|
end Hello; ~K5Cr
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汇编语言 pu/m8
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x86 CPU,DOS,TASM WF ?/GN
MODEL SMALL O`wYMng)
IDEAL Lnh':7FQJx
STACK 100H n0rerI[R
GB&Nt{
DATASEG YPF&U4CN
HW DB 'Hello, world!$' Bii6Z@kS
sg3h i"Im
CODESEG KY4d+~2
MOV AX, @data -W|*fKN`3
MOV DS, AX %B#hb<7}
MOV DX, OFFSET HW Z|2Eb*
MOV AH, 09H 'RDWU7c9]
INT 21H 'R^iKNPs
MOV AX, 4C00H xGKfej9
INT 21H b%Wd<N2
END jZXVsd
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x86 CPU,GNU/Linux,NASM a`7%A H)
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). OOCQsoN
;Enter this into "hello.asm" then type: jg~_'4f#
;"nasm -f elf hello.asm" u$WBc\j
;"ld hello.o -o hello" CnabD{uTf
;"./hello" '"oo;`g7
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section .data ;data section declaration [X;>*-
msg db 'Hello World!',0AH s{yJ:WncI
len equ $-msg ;string length :&Qb>PH[
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section .text ;code section declaration f"Ost;7zg
global _start ;entry point (start of execution) %lXbCE:[
_start: mov edx,len ;string length 7<^'DOs
mov ecx,msg ;string start 0(wf{5
mov ebx,1 ;file handle: stdout fH-NU-"
mov eax,4 ;sys_write j h;
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int 80h ;kernel system call (FM4 ^#6
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mov ebx,0 ;return value OZG0AX+=#
mov eax,1 ;sys_exit O[; +i
int 80h ;kernel system call O
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x86 CPU,Windows,MASM32 Oz:D.V
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.386 $v FrU v
.model flat,stdcall {5SfE$r
option casemap:none hO#HvW
;Include 文件定义 ]} '^`
include windows.inc j2M4H@
include user32.inc #-,g&)`]
includelib user32.lib aIQOs
include kernel32.inc ;U
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includelib kernel32.lib (G#}*
;数据段 iDZrK%fl
.data M
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szCaption db 'A MessageBox!',0 ]x2Jpk99a
szText db 'Hello,world!',0 ~NxEc8Y
;代码段 !&W|myN^
.code ~
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start:
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invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK }xqXd%uz
invoke ExitProcess,NULL $)Wb#B
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> )B81i!
q
end start d5Qd'
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AWK w5,6$#
BEGIN { print "Hello, world!" } RYt6=R+f
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BASIC [6_"^jgH
传统版BASIC(例如GWBASIC): Y:wF5pp;
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10 PRINT "Hello, world!" 3)y{n%3L
20 END Lj iI+NJ
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或在提示符输入: L7m`HVCt&
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?"Hello, world!":END +I&J7ICV0
|-n
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现代版BASIC(例如Quick BASIC): e[}],W
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Print "Hello, world!" m*gj|1k
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以下的语句在Quick BASIC中同样有效: 0vDg8i\
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? "Hello,world!" ?s%v 3T
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BCPL i *B:El1
GET "LIBHDR" WKxm9y
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LET START () BE q@%h^9.
$( Wk}D]o0^@
WRITES ("Hello, world!*N") v~}5u
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$) YwXXXh
rCE;'? Y
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Befunge ]%Y\ZIS
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Brainfuck VJg,~lQN#t
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+++++++++++++++.>.+++.------.--------.>+.>. ,%Z&*n
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C H*rx{ F?
#include <stdio.h> p qeL%="p;
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int main(void) Pcdf$a"`
{ LEK/mCL
printf("Hello, world!\n"); 0I
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return 0; \yG`Sfu2
} <m0{'xw
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C++ q &
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#include <iostream> TP{Gt.e
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int main() (z2Z)_6L*L
{ `NSy"6{Z
std::cout << "Hello, world!" << std::endl; %[ /<+
return 0; f>z`i\1oO
} ~:EW>Fq%i
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C++/CLI xr.XU'
int main() ~ezCu_
{ q@kOTkHv)
System::Console::WriteLine("Hello, world!"); B+Z13;}B
} "yW&<7u1
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C# (C Sharp) q{E"pyt36R
class HelloWorldApp E/mw* c^
{ `hzrfum4
public static void Main() ?PH/?QP
{ xnbsg!`;7W
System.Console.WriteLine("Hello, world!"); N_G4_12(
} vCb]%sd-U
} q}wj}t#
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COBOL [(|v`qMv/g
IDENTIFICATION DIVISION.
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PROGRAM-ID. HELLO-WORLD. P'tMu6+)
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ENVIRONMENT DIVISION. `?9T~,
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DATA DIVISION. *QH[,F`I
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PROCEDURE DIVISION. +9[SVw8
DISPLAY "Hello, world!". '9J*6uXf.
STOP RUN. 6^E`Sa!s
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Common Lisp `c(\i$1JY)
(format t "Hello world!~%") 8Z# 21X>
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DOS批处理 Tn A?u (R%
@echo off <'&F;5F3V
echo "Hello, world!" //.>>-~1m
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#3 bv3m
Eiffel ?z=\Ye5x
class HELLO_WORLD U=cWmH
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creation a2yE:16o6
make .X
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feature |s=`w8p
make is 8Kk\*8 <
local OCnFEX"
io:BASIC_IO [U.v:tR
do Rri`dmH
!!io aFY u}kl
io.put_string("%N Hello, world!") |nY~ZVTt/
end -- make &U"X$aFc
end -- class HELLO_WORLD Np2ci~"<.
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Erlang U<Jt50O
-module(hello). Zw$
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-export([hello_world/0]). \[#t<dD
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hello_world() -> io:fwrite("Hello, World!\n"). ;6m;M63 z
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Forth /P+q}L%
." Hello, world!" CR 'Kz9ygZy
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Fortran n?E}b$6
WRITE(*,10) &q>zR6jne
10 FORMAT('Hello, World!') 'UfeluMd
STOP SW9fE:v
END <1@
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(V?@?25
HTML v0@)t&O
<HTML> w sY}JT
<HEAD> [uR/M
<TITLE> Hello World! </TITLE> `ZGcgO<c\
</HEAD> 4tJa-7
<BODY> 5=Lq=,K$
<p>Hello World!</p> 1 Z[f
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</BODY> kMxjS^fr
</HTML> Gvx[8I
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INTERCAL X9XI;c;b-
PLEASE DO ,1 <- #13 [,g~m9
DO ,1 SUB #1 <- #238 g1|w? pI1
DO ,1 SUB #2 <- #112 l[%lE
DO ,1 SUB #3 <- #112 (E!!pz
DO ,1 SUB #4 <- #0 Z'M`}3O
DO ,1 SUB #5 <- #64 YYUe)j{T
DO ,1 SUB #6 <- #238 #Ufo)\x
DO ,1 SUB #7 <- #26 )^/0cQcJ
DO ,1 SUB #8 <- #248 fgCT!s7z
DO ,1 SUB #9 <- #168 =~|:t&v=c
DO ,1 SUB #10 <- #24 {THqz$KN
DO ,1 SUB #11 <- #16 cm@;*
DO ,1 SUB #12 <- #158 Vb)zZ^va+
DO ,1 SUB #13 <- #52 : F9|&q-W,
PLEASE READ OUT ,1 6 bO;&
PLEASE GIVE UP !'W- 6f
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Java |_zO_F rtp
public class Hello bd \=h1
{ MR;X&Up6!
public static void main(String[] args) ([LIjaoi
{ b{&FuvQg