“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。 P\N`E?lJL
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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》。 3)Paf`mr
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以下是用不同语言写成的Hello World程序的几个例子: ^=R>rUCmv
Ada ]4z?sk@
with Ada.Text_Io; use Ada.Text_Io; {L q
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procedure Hello is O^:Rm=,$
begin Y/@4|9!
Put_Line ("Hello, world!"); _v2FXm
end Hello; K bwWrf>
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汇编语言 BT#'<!7!
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x86 CPU,DOS,TASM 7sLs+|<"
MODEL SMALL -u{k
IDEAL Q'Q+mt8u5
STACK 100H |n6nRE wW
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DATASEG 1RcaE!\p
HW DB 'Hello, world!$' ?"sk"{
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CODESEG c>DAR
MOV AX, @data PJ
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MOV DS, AX UTs0=:+,t
MOV DX, OFFSET HW y@_4OkR@
MOV AH, 09H YO-O-NEP
INT 21H 39m#
MOV AX, 4C00H IS'=%qhC`
INT 21H #;^.&2Lt
END 1Z`<HW"
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x86 CPU,GNU/Linux,NASM I S!B$
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). T+2?u.{I
;Enter this into "hello.asm" then type: )cOm\^,
;"nasm -f elf hello.asm" 9B*SWWAj
;"ld hello.o -o hello"
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;"./hello" b(~NqV!i
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section .data ;data section declaration u4.-AY {
msg db 'Hello World!',0AH %C)U
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len equ $-msg ;string length bLNQ%=FjO
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section .text ;code section declaration 0V`/oaW;
global _start ;entry point (start of execution) "t\rjFw
_start: mov edx,len ;string length 6dg[
mov ecx,msg ;string start NrL%]dl3/
mov ebx,1 ;file handle: stdout <'B`b
mov eax,4 ;sys_write U'lrdc"Q
int 80h ;kernel system call wetkmd
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mov ebx,0 ;return value pK$^@~DE
mov eax,1 ;sys_exit RHB>svT^K>
int 80h ;kernel system call cQ+V4cW
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x86 CPU,Windows,MASM32 i>e7 5`9
.386 GbNVcP.ocP
.model flat,stdcall y< 146
option casemap:none 0HG*KW
;Include 文件定义 e@X~F6nP
include windows.inc P7@qvg
include user32.inc E[_Z%zd^
includelib user32.lib OjZ+gl}
include kernel32.inc v3aiX
includelib kernel32.lib Wxp^*._q3I
;数据段 VMtR4! :q
.data t/q\Ne\\,
szCaption db 'A MessageBox!',0 ]A'e+RD4k
szText db 'Hello,world!',0 O
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;代码段 ~8|$KD4I
.code
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start: Q$RP2&
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK LXw&d]P
invoke ExitProcess,NULL Hj2P|;2S
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end start _;0:wXib=
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AWK QR^pu.k@
BEGIN { print "Hello, world!" } y8,es$
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BASIC j[Et+V?
传统版BASIC(例如GWBASIC): )ns;S
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10 PRINT "Hello, world!" ZY][LU~l8
20 END fxiq,o0
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或在提示符输入: Kk??}
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?"Hello, world!":END &=s{ +0
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现代版BASIC(例如Quick BASIC): T mUn/
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Print "Hello, world!" Y3-15:-
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以下的语句在Quick BASIC中同样有效: n}._Nb
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? "Hello,world!" V#sANi?mpo
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GET "LIBHDR" 5F0sfX
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LET START () BE @o>2:D1G
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WRITES ("Hello, world!*N") E%$FX'8&
$) LTJ|EXYA
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Befunge 0 J ANj
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Brainfuck /j.V0%
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C >r{,$)H0
#include <stdio.h> 1_<'S34
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int main(void) hS<x+|'l
{ 7$b78wax
printf("Hello, world!\n"); $r_z""eOc
return 0; 9fe~Q%x=u
} 2"%d!"
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C++ m~X:KwK4
#include <iostream> WXGLo;+>I
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int main() eaCEZHr$
{ hp[8.Z$7
std::cout << "Hello, world!" << std::endl; "*TnkFTR
return 0; =k0l>)
} Y}F+4
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C++/CLI h`jtmhoz
int main() m#8mU,7
{ Ak|jJ
System::Console::WriteLine("Hello, world!"); jQ`cfE$sV
} gKBcD\F
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C# (C Sharp) !&! sn"yD
class HelloWorldApp (8{h I
{ o'Po<I
public static void Main() 4UG7{[!+
{ PBkKn3P3
System.Console.WriteLine("Hello, world!"); 'p{>zQ\5
} Jd)|==yD
} Z=wLNm H
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COBOL , gz:2UY#
IDENTIFICATION DIVISION. =Ermh7,
PROGRAM-ID. HELLO-WORLD. uv._N6mj
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ENVIRONMENT DIVISION. UJlKw `4
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DATA DIVISION. 6kYn5:BhIi
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PROCEDURE DIVISION. `ZNzDr
DISPLAY "Hello, world!". M-0BQs`N
STOP RUN. )<jj O
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Common Lisp ?2DYz"/')
(format t "Hello world!~%") <BT}Tv9
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DOS批处理 P>jlFm
@echo off +ZXk0sP_<
echo "Hello, world!" VxaJ[s3PQ&
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Eiffel u9}=g%TV
class HELLO_WORLD oGXT,38*
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creation r@k&1*&
make hb[K.`g
feature !=eui$]
make is
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local +*F ;l\R
io:BASIC_IO FRX'"gIR0
do eV}Ow`~I5
!!io ,zz+s[ZH7O
io.put_string("%N Hello, world!") )*$'e<?`
end -- make :Q!U;33aG
end -- class HELLO_WORLD xUzfBn
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Erlang B!rY\ ?W
-module(hello). JZ80 |-c
-export([hello_world/0]). ?v `0KF
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hello_world() -> io:fwrite("Hello, World!\n"). B-'Xk{
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Forth 8@Y]dzgjj
." Hello, world!" CR `3\5&B