“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。 `xm4?6
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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》。 Smjg[
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以下是用不同语言写成的Hello World程序的几个例子: =j$!N# L
Ada P3u,)P&
with Ada.Text_Io; use Ada.Text_Io; b :J$
procedure Hello is W%.ou\GN^t
begin %@4/W N
Put_Line ("Hello, world!"); d%C:%d
end Hello; Ad'b{C%
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汇编语言 ?RI&7699+
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x86 CPU,DOS,TASM oyt#C HX
MODEL SMALL yDn8{uI
IDEAL /`"&n1
STACK 100H I[$SVPe#
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DATASEG e|&}{JP{[
HW DB 'Hello, world!$' #Emz9qTsce
o7B }~;L
CODESEG LnY`f -H
MOV AX, @data [Dou%\
MOV DS, AX )VoQ/ch<
MOV DX, OFFSET HW `E4OgO
MOV AH, 09H
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INT 21H <xpHlLc
MOV AX, 4C00H xO nW~Z
INT 21H ulzQ[?OMl
END (RtjD`e}
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x86 CPU,GNU/Linux,NASM JLZ=$ d
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). MG6y
;Enter this into "hello.asm" then type: eKj'[2G@/
;"nasm -f elf hello.asm" ctB(c`zcY
;"ld hello.o -o hello" YR$)yl
;"./hello" zEu15!~
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section .data ;data section declaration KE
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msg db 'Hello World!',0AH E
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len equ $-msg ;string length HGJfj*JH
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section .text ;code section declaration fL7u419=
global _start ;entry point (start of execution) }G50?"^u
_start: mov edx,len ;string length (K>=!&tlp=
mov ecx,msg ;string start yxpDQO~x
mov ebx,1 ;file handle: stdout 7vf?#^RlV
mov eax,4 ;sys_write N)rf/E0
int 80h ;kernel system call IC:wof "
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mov ebx,0 ;return value acdWU"<
mov eax,1 ;sys_exit [q5N 4&q\
int 80h ;kernel system call *wOuw@09
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x86 CPU,Windows,MASM32 <y30t[.E6
.386 buv*qPO
.model flat,stdcall ^twJNm{99
option casemap:none ".=LzjE<gv
;Include 文件定义 5W29oz}-S
include windows.inc ag
\d4y6
include user32.inc Y=- ILN("
includelib user32.lib rWXw/a
include kernel32.inc ZO !
includelib kernel32.lib ,*w
;数据段 BL&D|e
.data QlFt:?7f
szCaption db 'A MessageBox!',0 H^e0fm
szText db 'Hello,world!',0 kQY+D1
;代码段 E*F)jP,yo
.code ^ew<|J2,B
start: =:;KYuTr
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK xn)eb#r
invoke ExitProcess,NULL l`}Ag8Q
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> s?2DLXv}!
end start m@_m"1_;
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BEGIN { print "Hello, world!" } C<?Huw4R0
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BASIC (^ Q:zU
传统版BASIC(例如GWBASIC): 3hrODts
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10 PRINT "Hello, world!" H%*<t}
20 END P(Fd|).j$
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或在提示符输入: +&p}iZp
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?"Hello, world!":END q~K
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现代版BASIC(例如Quick BASIC): guC7!P^
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Print "Hello, world!" rkW2_UTZE
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以下的语句在Quick BASIC中同样有效: WLTraB[?
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? "Hello,world!" p
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BCPL 1{.=T&eG#
GET "LIBHDR" mu1Lg s$;
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LET START () BE s]X]jfA.
$( 0uf'6<f R
WRITES ("Hello, world!*N")
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$) mu(EmAoenQ
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Befunge {Y%X
"!dlrow olleH">v Z{|U!tn
, XU}|Ud562
^_@ UBUZ}ZIbN
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Brainfuck qQ_o>+3VAy
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< osJ;"B36
+++++++++++++++.>.+++.------.--------.>+.>. r#K;@wu2
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r# }`{C;+5
C 9\|n2$H:
#include <stdio.h> -F+dRzxH
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int main(void) -n-rKN.T
{ ;!CYp;_
printf("Hello, world!\n"); ydNcbF%K
return 0; mkCv
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} nr#DE?
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C++ \gh`PS-B
#include <iostream> WrR97]7t
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int main() [>'P
{ 1!x-_h}
std::cout << "Hello, world!" << std::endl; dJh T}"x
return 0; WheJ 7~
} b ;Vy=f
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C++/CLI #K3A{
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int main()
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{ CaZ{UGokL
System::Console::WriteLine("Hello, world!"); bBQ1~ R
} y:0j$%^
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C# (C Sharp) kpM5/=f/@
class HelloWorldApp ~ituPrH%<
{ `};8
public static void Main() 5N:THvh6o
{ L`yyn/2>
System.Console.WriteLine("Hello, world!"); y7I')}SC
} |]5g+sd
} HR85!S`
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COBOL "tgaFtC=w
IDENTIFICATION DIVISION. |M?yCo
PROGRAM-ID. HELLO-WORLD. =H_|007C
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ENVIRONMENT DIVISION. YQ`GOP#/
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DATA DIVISION. eZ]4,,m
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PROCEDURE DIVISION. 0Ts[IHpg&E
DISPLAY "Hello, world!". 5@$b@jTd
STOP RUN. tQy@d_a=y
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Bv^{|w
Common Lisp (;o,t?:d
(format t "Hello world!~%") K8.=bGyg
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6g*B=d(j
DOS批处理 cH()Ze-B
@echo off yfS`g-j{~
echo "Hello, world!" jXO*_R
&~+lXNXF
1.]Py" @:
Eiffel $/%|0tQ
class HELLO_WORLD jUq^$+N
/@5X0m
creation =N,Mmz%
make So*Q8`"-.
feature klG]PUzd
make is 3S-n sMs.
local I=VPw5"E
io:BASIC_IO JJ3(0
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do (m[]A&u
!!io &L,zh{Mp
io.put_string("%N Hello, world!") f i-E_
end -- make r'/7kF- 5
end -- class HELLO_WORLD b$P=rIB
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d ,| W
Erlang '&5A*X]d
-module(hello). qb y!
-export([hello_world/0]). N(v<*jn
A]2zK?|s
hello_world() -> io:fwrite("Hello, World!\n"). dA[Z\
!GcH )
j_E$C.XU{g
Forth T<\Q4Coth
." Hello, world!" CR 2G8f4vsC[
jb8v3L
s@C@q(i6
Fortran i,BE]w
WRITE(*,10) F>,kKR-
10 FORMAT('Hello, World!') !tGXh9g
STOP f)\ =LV
END ]3<k>?
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HTML h_4o4#
<HTML> -Cwx %
<HEAD> ZYo Wz(
<TITLE> Hello World! </TITLE> N^A&DrMF
</HEAD> /#M|)V*wn
<BODY> *P&ZE
<p>Hello World!</p> Hq h
</BODY> *p{wC
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</HTML> RS G\3(
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H [G^ir
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INTERCAL <;:M:{RZY
PLEASE DO ,1 <- #13
:\1:n
DO ,1 SUB #1 <- #238 w?A&X