“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。 jVxX! V
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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》。 +yO^,{8SE
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以下是用不同语言写成的Hello World程序的几个例子: BJ,D1E
Ada I%#&@
with Ada.Text_Io; use Ada.Text_Io; y2=`NG=
procedure Hello is s(u,mtG
begin k __MYb
Put_Line ("Hello, world!"); hP$v,"$
end Hello;
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汇编语言 "$6 .L^9W
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x86 CPU,DOS,TASM vk>EFm8l
MODEL SMALL =j&qat
IDEAL D$&LCW#x
STACK 100H /jB0
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DATASEG -]$=.0 l
HW DB 'Hello, world!$' 4n9c
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CODESEG CG397Y^
MOV AX, @data ]\ DIJ>JZ
MOV DS, AX M>m+VsJV
MOV DX, OFFSET HW fx#Krr@
MOV AH, 09H 7sglqf>
INT 21H Ao}J
MOV AX, 4C00H )/4xR]
INT 21H 8F(Vd99I
END +@5@`"Jry
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x86 CPU,GNU/Linux,NASM Ce~
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 0[QVU,]<
;Enter this into "hello.asm" then type: =E~)svl6g
;"nasm -f elf hello.asm" tg|7\Z7i
;"ld hello.o -o hello" L32 [IL|
;"./hello" 2z+-vT%
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section .data ;data section declaration fk!P#
msg db 'Hello World!',0AH h^aUVuL/
len equ $-msg ;string length 2nsW)bd
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section .text ;code section declaration K2gg"#ft?
global _start ;entry point (start of execution) ~P@6fK/M
_start: mov edx,len ;string length <>I4wqqb
mov ecx,msg ;string start KvtX>3#qM
mov ebx,1 ;file handle: stdout "H"4]m1Wc
mov eax,4 ;sys_write
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int 80h ;kernel system call iLR^ V!
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mov ebx,0 ;return value ,lUr[xzV
mov eax,1 ;sys_exit Z?AX
int 80h ;kernel system call bzh`s<+
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x86 CPU,Windows,MASM32 GDBxciv
.386 m:4Ec>?e
.model flat,stdcall =,WW#tD
option casemap:none _`LQnRp(
;Include 文件定义 F?EAIL
include windows.inc =xX)2h
include user32.inc blHJhB&8
includelib user32.lib #OE]'k
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include kernel32.inc #\LsM
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includelib kernel32.lib rh+2
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;数据段 L,PD4H"8
.data lemE/(`a_
szCaption db 'A MessageBox!',0 KBSO^<7
szText db 'Hello,world!',0 9EI Oa/*
;代码段 |',$5!:0O
.code H}}g\|r&
start: %"{jNC?
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK [t.x cO
invoke ExitProcess,NULL ?Gr2@,jlD
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 6Q}WX[| tQ
end start Dqh
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BEGIN { print "Hello, world!" } f.X<Mo
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BASIC B+Ox#[<75
传统版BASIC(例如GWBASIC): C_q@ixF{
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10 PRINT "Hello, world!" `:y {
20 END DuV@^qSbG.
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或在提示符输入: "oc&uj
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?"Hello, world!":END lf?dTPrD
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现代版BASIC(例如Quick BASIC): //W7$DYEG
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Print "Hello, world!" G$T#ql
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以下的语句在Quick BASIC中同样有效: YKtF)N;m]
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? "Hello,world!" z&x3":@u<
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BCPL t7].33%\
GET "LIBHDR" Aq~}<qkIF+
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LET START () BE jXu)%<
$( zv>3Tc0R
WRITES ("Hello, world!*N") :
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$) {@tqeu%IM
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Befunge :<w2j6V
"!dlrow olleH">v LLlt9(^d
, }>T$2"pf
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< [>^xMF]$2
+++++++++++++++.>.+++.------.--------.>+.>. %n7Y5|Uh
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C T)Ohk(jK1
#include <stdio.h> |gP9^B?3
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int main(void) R<-u`uXnP
{ pA|Z%aL
printf("Hello, world!\n"); fVJsVZ"6v`
return 0; zVL"$ )
} 9f/RD?(1O
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C++ U.mVz,k3
#include <iostream> Za4X
;
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int main() [@RJ2q$
{ J#OiY
std::cout << "Hello, world!" << std::endl; JxlU=7cF
return 0; 1>wQ&{
} g~#HiBgWq[
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C++/CLI 72;4
int main() A"$UU6Z4
{ Aqp$JM
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System::Console::WriteLine("Hello, world!"); FdZG%N>Z
} 9f+S-!
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C# (C Sharp) RXZ}aX[h
class HelloWorldApp wy)I6`v
{ ?oKY"C8/
public static void Main() h_{//W[
{ PX%Y$`
System.Console.WriteLine("Hello, world!"); 4IEF{"c_8
} g*uo2-MN&e
} sh|@X\EZO
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COBOL Wdp?<U
IDENTIFICATION DIVISION. 2S`D7R#6s
PROGRAM-ID. HELLO-WORLD. vI)-Zz[3
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ENVIRONMENT DIVISION. M1sR+e$"
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DATA DIVISION. [p7cgHSMt
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PROCEDURE DIVISION. l'#P:eW
DISPLAY "Hello, world!". I,pI2
STOP RUN. S9'8rn!_
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Common Lisp !VF.=\iH/
(format t "Hello world!~%") .S{Q }S
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DOS批处理 n%"0%A
@echo off p`
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echo "Hello, world!" .^Z^L F
N=`xoF
{ 4(E
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Eiffel W%)uKQha
class HELLO_WORLD < mb.F -8
q')MKR*
creation qg(rG5kD@
make ~sd+ch*
feature T==(Pw7R7
make is e!:/enQo
local Fa!6*K\
io:BASIC_IO v@8=u4
do AhjUFz
!!io ylEQeN
io.put_string("%N Hello, world!") &vy/Vd
end -- make @L)=epC
end -- class HELLO_WORLD .7!n%Ks
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Erlang PhS`,I^Z
-module(hello). D`t }V
-export([hello_world/0]). u)DhkF|
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hello_world() -> io:fwrite("Hello, World!\n"). t:|+U:! >
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Forth x}w"2[fL
." Hello, world!" CR ; U)a)l'y
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