“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。 pGdo:L?
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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》。 + tza]r:
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以下是用不同语言写成的Hello World程序的几个例子: 8Jb N&C
Ada Qy_! +q
with Ada.Text_Io; use Ada.Text_Io; S<bsrS*$
procedure Hello is ;j^C35
begin 8ZPjzN>c6
Put_Line ("Hello, world!"); .1#G*A|
end Hello; Z %\*\6L)
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汇编语言 bL9vjD'}
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x86 CPU,DOS,TASM 9E-]S'Z
MODEL SMALL r;
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IDEAL [OK(
STACK 100H moT*r?l
&h_do8R
DATASEG eUeOyC
HW DB 'Hello, world!$' N^;rLrm*
" }oH3L
CODESEG (f `zd.
MOV AX, @data {]V+C=`
MOV DS, AX k2Y *
MOV DX, OFFSET HW S"skKh4w
MOV AH, 09H ~![J~CkPS
INT 21H FvVR \a
MOV AX, 4C00H N~t4qlC/
INT 21H w_h}c$;GK
END ^a{cK
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x86 CPU,GNU/Linux,NASM 5KI lU78
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). $2'Q'Mx[gd
;Enter this into "hello.asm" then type: q@0g KC&U
;"nasm -f elf hello.asm" *j"u~ NF
;"ld hello.o -o hello" FQW{c3%qZ
;"./hello" |fhYft
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section .data ;data section declaration yirQ
msg db 'Hello World!',0AH d:SLyFD$q
len equ $-msg ;string length h}SP`
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section .text ;code section declaration ?4A$9H
global _start ;entry point (start of execution) z(g6$Y{
_start: mov edx,len ;string length ~H1ZQ[
mov ecx,msg ;string start MR`lF-|a|
mov ebx,1 ;file handle: stdout hF;TX.Y6
mov eax,4 ;sys_write 49d02AU%
int 80h ;kernel system call Tw0GG8(c
U1 ;<NUg
mov ebx,0 ;return value 3Eu;_u_
mov eax,1 ;sys_exit $l+DkR+
int 80h ;kernel system call +\/1V`
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#[$zbZ(I>:
x86 CPU,Windows,MASM32 q88;{?T1
.386 TQ&1!~L*
.model flat,stdcall '%y5Dh
option casemap:none Q$lgC
v^M
;Include 文件定义 ]**h`9MF
include windows.inc ayK?\srw
include user32.inc q\]"}M8
includelib user32.lib vn(ji=
include kernel32.inc g;mX {p_@
includelib kernel32.lib A8oTcX_
;数据段 o<Y[GW1pg
.data -lqsFaW
szCaption db 'A MessageBox!',0 {;-wXzv`
szText db 'Hello,world!',0 >^N{
;代码段 rGIf/=G^r
.code $z48~nu@j
start: TkyP_*
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK %=[xc?
invoke ExitProcess,NULL Kd;Iu\4hv
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Iy8fN"I9D
end start N.D7
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AWK ONU,R\jMb-
BEGIN { print "Hello, world!" } 7Adg;
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BASIC Lh;U2pA
传统版BASIC(例如GWBASIC): \h48]ZjC`
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10 PRINT "Hello, world!" >O$JS,
20 END y)*W!]:7^>
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或在提示符输入: z`esst\aV
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?"Hello, world!":END *VV#o/Qp
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现代版BASIC(例如Quick BASIC): \S]` { kY,
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Print "Hello, world!" ] =*G[
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以下的语句在Quick BASIC中同样有效: -,a@bF:
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? "Hello,world!" {baG2Fe1`b
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BCPL Z66h
GET "LIBHDR" "[
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LET START () BE s8V:;$ !
$( XmAun
WRITES ("Hello, world!*N") 5hj
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Befunge 'PWX19
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Brainfuck UZRN4tru6
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+++++++++++++++.>.+++.------.--------.>+.>. dJ.up*aR
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C 8DGPA
#include <stdio.h> r)|6H"n#]S
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int main(void) 1YScZ
{ noZ!j>f{@l
printf("Hello, world!\n"); SQT]'
return 0; XIBm8IkF
} g#lMT%
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C++ %;,4q B
#include <iostream> *?rO@sQy]
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int main() &fe67#0r)
{ %:N;+1
std::cout << "Hello, world!" << std::endl; wnjAiIE5
return 0; G#YBfPmr
} {J*|)-eAw
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C++/CLI js;k,`
int main()
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{ 6%Pvh- ~_
System::Console::WriteLine("Hello, world!"); Hq
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} Y?AvcY.
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C# (C Sharp) #H;1)G(/
class HelloWorldApp m+QZ|
{ L~("C
public static void Main() M'nzoRk
{ %$'Z"njO&
System.Console.WriteLine("Hello, world!"); E<'V6T9bi
} :%<'('S|
} .^8rO,H[
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COBOL NtNCt;_R7
IDENTIFICATION DIVISION. d)kOW!5\
PROGRAM-ID. HELLO-WORLD. \3T[Cy|5|
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ENVIRONMENT DIVISION. PQ 2rNY6
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DATA DIVISION. /h 4rW>8D2
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PROCEDURE DIVISION. C9 j{:&
DISPLAY "Hello, world!". 9L>73P{_
STOP RUN. 0IyT(1hS
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Common Lisp
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(format t "Hello world!~%") \$!D^%~;
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V ;"Rp-`^
DOS批处理 -`D<OSt7
@echo off gI00@p:m
echo "Hello, world!" "dHo6CT,y_
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%awr3h>$
Eiffel P6A##z
class HELLO_WORLD qwq5yt?
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creation xAr&sGMA
make )JhB!P(
feature $!^C|,CS
make is +5Ju `Z
local NH4T*R)Vz
io:BASIC_IO 1[!7xA0 j
do :OV6R,
!!io U+[h^M$U
io.put_string("%N Hello, world!") =1\mLI}@
end -- make 0|ekwTx.
end -- class HELLO_WORLD fo~>y
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Erlang G4ycP8
-module(hello). ~-UO^$M-
-export([hello_world/0]). 84coi
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hello_world() -> io:fwrite("Hello, World!\n"). sF3@7~m4
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Forth r}}2Kl
." Hello, world!" CR GK[Hs1/
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Fortran u/V&1In
WRITE(*,10) 39L_O RMH
10 FORMAT('Hello, World!') $xis4/2
STOP YMVmpcz
END <o/l K\>
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HTML 7~);,#[ky
<HTML> o#>Mf464I
<HEAD> sRZ?Ilua6
<TITLE> Hello World! </TITLE> ([#'G+MC&