“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。 Ut%{pc 7^F
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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》。 4<EC50@.
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以下是用不同语言写成的Hello World程序的几个例子: "6~+-_:
Ada A{3nz DLI
with Ada.Text_Io; use Ada.Text_Io; ]:#W$9,WL
procedure Hello is h1Y^+A_
begin ?J|
Put_Line ("Hello, world!"); _Kli~$c& M
end Hello; p=[I;U-#H
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汇编语言 5HB*
5rtE/{A
x86 CPU,DOS,TASM PTQN.[bBh
MODEL SMALL =OrVaZ0
IDEAL DLq'V.M:
STACK 100H .5~3D97X&
-Zg.o$
DATASEG Lm^vS u
HW DB 'Hello, world!$' | @B|o-
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CODESEG G[d]t$f=
MOV AX, @data T7Y+ WfYh
MOV DS, AX $|@-u0sv
MOV DX, OFFSET HW ;iN[du
MOV AH, 09H 1yS:`
INT 21H '^Q$:P{G?
MOV AX, 4C00H *\0h^^|@
INT 21H x9]vhR/av
END A0ZU #"'/
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x86 CPU,GNU/Linux,NASM !6 kn>447Y
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 3z k},8fu
;Enter this into "hello.asm" then type: K,bX<~e5
;"nasm -f elf hello.asm" v# fny
;"ld hello.o -o hello" _GoFwVO
;"./hello" T0o0_R
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section .data ;data section declaration LCSJIt
msg db 'Hello World!',0AH 7 $Cv=8
len equ $-msg ;string length R_80J=%0
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section .text ;code section declaration Tkj
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global _start ;entry point (start of execution) p8iKZI]g
_start: mov edx,len ;string length )ItW}1[I
mov ecx,msg ;string start nx!+:P ,
mov ebx,1 ;file handle: stdout T#}"?A|
mov eax,4 ;sys_write GG4FS
int 80h ;kernel system call Jg&f.
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mov ebx,0 ;return value $GD
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mov eax,1 ;sys_exit u`*1OqU
int 80h ;kernel system call 0\1g-kc!v
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jU{~3Gn?
x86 CPU,Windows,MASM32 94lz?-j
.386 ~'Korxa
.model flat,stdcall US<l4
option casemap:none r+a0.
;Include 文件定义 @><8YN^)%
include windows.inc 7Xh
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include user32.inc +~xzgaL
includelib user32.lib ,y)V5
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include kernel32.inc T|--ZRYn
includelib kernel32.lib i@=(Y~tD`
;数据段 Xk :_aJ
.data a!&<jM
szCaption db 'A MessageBox!',0 0|mCk
szText db 'Hello,world!',0 BtF7P}:MGf
;代码段 bc6|]kB:
.code Nm#[ A4
start: Tog'3k9Uw
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ka$la;e3
invoke ExitProcess,NULL 1/=6s5vS}
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> e=ry_@7
end start 0J.]`kR
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BEGIN { print "Hello, world!" } =_$Hn>vO
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BASIC &8JK^zQq
传统版BASIC(例如GWBASIC): :TP\pH 7E
7!
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10 PRINT "Hello, world!" {afIr1j/m
20 END As|e=ut(
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或在提示符输入: ^5R2~
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?"Hello, world!":END %d0BQ|
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现代版BASIC(例如Quick BASIC): !dwa. lZ&X
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Print "Hello, world!" |cl*wFm|3
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以下的语句在Quick BASIC中同样有效: 3oPyh $*
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? "Hello,world!" 1+Q@RiW
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BCPL 2zkOs:
GET "LIBHDR" \|
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LET START () BE +o K*5 Y
$( #?DoP]1Y
WRITES ("Hello, world!*N") To,*H OP
$) whQJWi=ck
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Befunge n}8}:3"
"!dlrow olleH">v $OaxetPH
, {Lsl2@22
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Brainfuck ^K:-r !v^
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ,-SWrp`f
+++++++++++++++.>.+++.------.--------.>+.>. a-NicjV#
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#include <stdio.h> 5jsZJpk$
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int main(void) C/q!!
{ 3 ]pHc)p!.
printf("Hello, world!\n"); se29IhS!e
return 0; #l!nBY ~
} [6\b(kS+
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C++ {n(/ c33
#include <iostream> 9<5S!?JL
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int main() BR:Mcc
{ eaDG7+iS
std::cout << "Hello, world!" << std::endl; D=}\]Krmay
return 0; #j)"#1IE2W
} BCh|^Pk
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C++/CLI OU<v9`<
int main() dQy K4T
{ aAgQ^LY
System::Console::WriteLine("Hello, world!"); m{r#o?
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C# (C Sharp) !i\ gCLg2_
class HelloWorldApp +tJ 7ZR%
{ WF<3
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public static void Main() 22 feYm|
{ \q^:$iY~
System.Console.WriteLine("Hello, world!"); eU8p;ajW!L
} WJN)<+d
} #Sg"/Cc
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COBOL E@4/<;eKK
IDENTIFICATION DIVISION. .sD=k3d
PROGRAM-ID. HELLO-WORLD. ~nApRC)0
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ENVIRONMENT DIVISION. \r"gqv)^
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DATA DIVISION. 0B:
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PROCEDURE DIVISION. ]`M2Kwp
DISPLAY "Hello, world!". "Cs36k
STOP RUN. -,2CMS#N
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Common Lisp 6w[EJ;=p_
(format t "Hello world!~%") wOsg,p;\'
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DOS批处理 fg4mP_
@echo off U*?`tdXJ$
echo "Hello, world!" Zn[ppsz|
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Eiffel _PSOT5{
class HELLO_WORLD .br6x^\<
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creation |#'n VN.;
make kT:I.,N
feature nu(7YYCM$
make is o=Y'ns^a(
local ]J@-,FFC
io:BASIC_IO D"%>
do I5 qrHBJ >
!!io QNH3\<IS
io.put_string("%N Hello, world!") z"Mk(d@-E
end -- make m"QDc[^Ge
end -- class HELLO_WORLD Xt
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Erlang 2f620
-module(hello). bF5"ab0
-export([hello_world/0]). <_#2+7Qs
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hello_world() -> io:fwrite("Hello, World!\n"). 'gHg&E9E&
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Forth ~H1<