“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。 d]E.F64{
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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》。 pm= s
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以下是用不同语言写成的Hello World程序的几个例子: EW]8k@&g
Ada ~1,$
with Ada.Text_Io; use Ada.Text_Io; w/(2fU (
procedure Hello is nAj +HLO
begin y{tM|
Put_Line ("Hello, world!"); ,|UwZ_.
end Hello; $"Ci{iE
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汇编语言 ~"R;p}5"
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x86 CPU,DOS,TASM 2Aa
MODEL SMALL kCoEdQ_
IDEAL `j.-hy>s
STACK 100H 8D^ iQBA
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DATASEG F22]4DLHO
HW DB 'Hello, world!$' H}1XK|K3#H
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CODESEG >-`-D=!V
MOV AX, @data ai4ro"H
MOV DS, AX 2)q$HUIX
MOV DX, OFFSET HW +]C|y ,r
MOV AH, 09H U\YzE.G1]S
INT 21H g9=O<u#
MOV AX, 4C00H 7Uh/Gl
INT 21H D;DI8.4`N
END dFnu&u"
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x86 CPU,GNU/Linux,NASM <Lq.J`|+
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). >T29kgF2
;Enter this into "hello.asm" then type: cT'<,#^/
;"nasm -f elf hello.asm" U,~Z 2L
;"ld hello.o -o hello" K7
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;"./hello" ::Di
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section .data ;data section declaration z'Fu} ho
msg db 'Hello World!',0AH 'd< 1;Ayw
len equ $-msg ;string length ~_4$|WKl
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section .text ;code section declaration {
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global _start ;entry point (start of execution) sYyya:ykxT
_start: mov edx,len ;string length 0tN/P+!|
mov ecx,msg ;string start FS6ZPjG)
mov ebx,1 ;file handle: stdout 7{u1ynt
mov eax,4 ;sys_write 9Jf.Ls
int 80h ;kernel system call :k oXS
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mov ebx,0 ;return value uhr&P4EW
mov eax,1 ;sys_exit )Yw m_f-N
int 80h ;kernel system call Q-$EBNz
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x86 CPU,Windows,MASM32 (>gHfC>(lq
.386 ?\T):o;/
.model flat,stdcall X&bnyo P
option casemap:none VaFv%%w
;Include 文件定义 `F' >NNY
include windows.inc |),3`*N
include user32.inc WH0$v#8`v
includelib user32.lib *bTR0U
include kernel32.inc 8j&LU,
includelib kernel32.lib +Zo&c}
;数据段 =jW=Z$3q
.data $+Vp>
szCaption db 'A MessageBox!',0 4l"oq"uc
szText db 'Hello,world!',0 *lws7R
;代码段 jM|-(Es.)
.code $56Z/*
start: 4"y1M=he
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK {qjw
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invoke ExitProcess,NULL !S}4b
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> wT+b|K
end start ;bxL$1
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BEGIN { print "Hello, world!" } u'Ua ++a\
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BASIC gls %<A{C
传统版BASIC(例如GWBASIC): *#2]`G)
;wvhe;!
10 PRINT "Hello, world!" TbPTgE *
20 END =]yzy:~ey
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或在提示符输入: )kiC/Y}k
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?"Hello, world!":END xsIuPL#_
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现代版BASIC(例如Quick BASIC): 'qT[,iQ
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Print "Hello, world!" +Tug.[A
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以下的语句在Quick BASIC中同样有效: P,/=c(5\}
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? "Hello,world!" 20XN5dTFT
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BCPL ~$O.KF:
GET "LIBHDR" EqV]/0-\
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LET START () BE |H LU5=Y
$( Sl?@c/Ng
WRITES ("Hello, world!*N") m1mA:R\zM
$) #BK3CD(&
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Befunge $T)EJe
"!dlrow olleH">v rk$$gXg9/
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Brainfuck 9HjtWQn
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+++++++++++++++.>.+++.------.--------.>+.>. +~6Nq(kV
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C ;U02VguC
#include <stdio.h> 1${lHVx]
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int main(void) xzqgem`[\
{ \,b@^W6e>
printf("Hello, world!\n"); @.PVUP
return 0; lBbUA)z6
} Z;nbnRz
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C++ 6WN1DW
#include <iostream> /n9yv
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int main() sC/5N
{ >8pmClVvmR
std::cout << "Hello, world!" << std::endl; b R6g^Yf
return 0; -27uh
} Dd(#
B_^ ~5_0:
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C++/CLI WxN@&g(
int main() xS4B"/
{ 1qR[&=/
System::Console::WriteLine("Hello, world!"); 3M;[.b
} M=mzl750M
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C# (C Sharp) RY>BP[h
class HelloWorldApp yEaim~
{ Slk__eC
public static void Main() AjTkQ)
{ Z#+{ksU
System.Console.WriteLine("Hello, world!"); V!sT2
} Zd~l_V f
} \Bg;^6U
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COBOL 5$v,%~$Xds
IDENTIFICATION DIVISION. bJ[{[|yEd
PROGRAM-ID. HELLO-WORLD. lw.4O^
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ENVIRONMENT DIVISION. 'u\my
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DATA DIVISION. zL1*w@6
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PROCEDURE DIVISION. Ya#,\;dTT
DISPLAY "Hello, world!". j^t#>tZS
STOP RUN. l>KkK|!T^i
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Common Lisp CXb-{|I}d
(format t "Hello world!~%") =F(fum;zH
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DOS批处理 #cN0ciCT'
@echo off m&GxLT6
echo "Hello, world!" ,a:!"Z^f
j k%MP6
Z!@<[Vo6
Eiffel SJYy,F],V"
class HELLO_WORLD Q7 dXTS4H
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creation a/9R~DwN
make {uurM`f}:
feature g4NxNjM;
make is l?F&I.{J
local e <Hbm
io:BASIC_IO eYQq@lrWv
do wVI 1sR
!!io Q(P'4XCm
io.put_string("%N Hello, world!") nUAoPE
end -- make y^7ol;t
end -- class HELLO_WORLD SF$]{
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Erlang 9<0p1W O
-module(hello). orGNza"A
-export([hello_world/0]). `m6>r9:
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hello_world() -> io:fwrite("Hello, World!\n"). zJp}JO
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Forth RUJkfi=$
." Hello, world!" CR l8I`%bu
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!.\EU*)1
Fortran % D]vKv~<
WRITE(*,10) ~9&