“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。 s]kzXzRC?
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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》。 gCG#?f
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以下是用不同语言写成的Hello World程序的几个例子: LdNpb;*
Ada oUN\tOiS+
with Ada.Text_Io; use Ada.Text_Io; ZADMtsk
procedure Hello is ZS]Z0iZv9
begin a:HN#P)12
Put_Line ("Hello, world!"); mDbTOtD
end Hello; \.H9e/vU`
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汇编语言 ZbdGI@
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x86 CPU,DOS,TASM h2Th)&Fb>
MODEL SMALL !'BXc%`x[
IDEAL O
j:I @c
STACK 100H X9FO"(J
tH
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DATASEG vbtZ5Gm
HW DB 'Hello, world!$' .{`C>/"}
5%fWX'mS
CODESEG pO:]3qv
MOV AX, @data C8Mx>6
MOV DS, AX A4#FAFy
MOV DX, OFFSET HW N#e9w3Rli
MOV AH, 09H PO6yEr
INT 21H lfC]!=2%~8
MOV AX, 4C00H <? !'
INT 21H jg{2Sxf!c
END 4`: POu&
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x86 CPU,GNU/Linux,NASM !|u?z%
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). |?g-8":H8P
;Enter this into "hello.asm" then type: "gm5DE
;"nasm -f elf hello.asm" D g0rVV6c
;"ld hello.o -o hello" ;i?2^xe^~c
;"./hello" 2;:p
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m&xVlS
section .data ;data section declaration ]Z6? m
msg db 'Hello World!',0AH S`FIb'J
len equ $-msg ;string length Dr%wab"yy
%3#C0%{x
section .text ;code section declaration "Z,T%]
global _start ;entry point (start of execution) l,l6j";ohd
_start: mov edx,len ;string length _<sN54
mov ecx,msg ;string start h\3-8m
mov ebx,1 ;file handle: stdout s>L.V2!$0
mov eax,4 ;sys_write 7t<MHdw
int 80h ;kernel system call h| wdx(4
eh]syeKBj
mov ebx,0 ;return value 5<v1v&
mov eax,1 ;sys_exit F4z#u2~TC
int 80h ;kernel system call vBF9!6X .
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x86 CPU,Windows,MASM32 Q{950$)L
.386 gVzIEE25
.model flat,stdcall `t)9u^[<(
option casemap:none y'4Qt.1ukN
;Include 文件定义 h{ix$Xn~
include windows.inc @Bhcb.kbq
include user32.inc YOGj__:
includelib user32.lib Gvh"3|u?z
include kernel32.inc +BL4 6Bq
includelib kernel32.lib X"_
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;数据段 sHk>ek]2I
.data P3|s}&
szCaption db 'A MessageBox!',0 h
ka_Fo
szText db 'Hello,world!',0 a <?~1pWtc
;代码段 vFntzN>#
.code l}VE8-XB
start: ^4"AWps
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK zN[&
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invoke ExitProcess,NULL ,z/aT6M?H
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> E/%"%&`8j
end start w@cW`PlF
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AWK Bz-jy.
BEGIN { print "Hello, world!" } v=lW5%r,'
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BASIC
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传统版BASIC(例如GWBASIC): 23L>)Q
O |P<s+
10 PRINT "Hello, world!" +8N6tw/&
20 END !^su=c
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或在提示符输入: At=d//5FFP
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?"Hello, world!":END C,l,fT
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现代版BASIC(例如Quick BASIC): hd9HM5{p
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Print "Hello, world!" 9ABU^ig
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以下的语句在Quick BASIC中同样有效: ^OWG9`p+
=r ^_D=
? "Hello,world!" |R@T`dW
U[?_|=~7
h^tCF=S
BCPL DWKQ>X6
GET "LIBHDR" *1`X}
b1 w@toc
LET START () BE `<se&IZE
$( a!: N
C
WRITES ("Hello, world!*N") Uz! 3){E
$) Jk\-e`eE
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Befunge 4y7_P0}:B
"!dlrow olleH">v 1a{3k#}
, &Z]}rn
^_@ >iOf3I-ATt
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Brainfuck V2T%tn;rp
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 2Wluc37
+++++++++++++++.>.+++.------.--------.>+.>. Vl5>o$G|<.
70 R6:
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C %CiF;wJ
#include <stdio.h> 9!Mh(KtQ
(=7"zECq#
int main(void) kpn|C 9r
{ 2n@`Og_0
printf("Hello, world!\n"); [//i "Nm
return 0; VrZfjpV
} ^*.$@M
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VM\R-[
C++ "E2 0Y"[h
#include <iostream> |@JTSz*Or
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int main() >tcEx(
{ 3qe`#j
std::cout << "Hello, world!" << std::endl; ^w1+b;)
return 0; \]Ah=`
} S^pb9~
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C++/CLI ,R`CAf%*
int main() c 1F^Gj!8
{ ch0^g8@Q[
System::Console::WriteLine("Hello, world!"); 6;'[v}O^^
} P knOeW"j
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LQPQ !):;
C# (C Sharp) <9fXf*
class HelloWorldApp AEyD?^?
{ iiq
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public static void Main() :wIA.1bK}
{ MZh.Xo
System.Console.WriteLine("Hello, world!"); 1 gjaTPwY
} 6L8nw+mEK
} %MHL@Nn>e
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q][kD2
COBOL n&;JW6VQS
IDENTIFICATION DIVISION. G=17]>U
PROGRAM-ID. HELLO-WORLD. ;
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~q566k!Ll!
ENVIRONMENT DIVISION. 9/0H,qZc
*>=tmW;%
DATA DIVISION. `S|F\mI~
$GRw k>N
PROCEDURE DIVISION. ~wW]ntZm
DISPLAY "Hello, world!". 2Cp4aTGv#
STOP RUN. Bn&P@C$7
Vp]7n!g4l
<h/q^| tZ{
Common Lisp M{24MF
(format t "Hello world!~%") g.9C>>tj
_$>);qIP4
aF?_V!#cT
DOS批处理 vf3) T;X>
@echo off geyCS3
:p
echo "Hello, world!" Lbz/M_G
@QmN= X5
h7E?7nR
Eiffel SnFyK5
class HELLO_WORLD ck]I?
aYa`ex
creation - nNKUt.I
make @3c'4O
feature 5CK\Z'c~!
make is A_@..hX(
local ?Sh]kJO
io:BASIC_IO i_*yS+Z;
do )'n@A% B
!!io rogy`mh\r2
io.put_string("%N Hello, world!") 5"nq
h}5
end -- make vOlfyH>
end -- class HELLO_WORLD Lld45Bayb
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Erlang 6t; ;Fz
-module(hello). q("XS
-export([hello_world/0]). $5 G(_
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hello_world() -> io:fwrite("Hello, World!\n"). ^oPFLez56
G;cC!x<
O"~[njwkE
Forth n)5t!
." Hello, world!" CR apm%\dN
o$L%t@
ZskX!{
Fortran Ne<S_u2nT
WRITE(*,10) ~2rQ80_
10 FORMAT('Hello, World!') ~F-knEvL
STOP F?2UHcs
END 0a:oC(Ak
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HTML {ax]t-ZwJ5
<HTML> r*b+kSh
<HEAD> Fvk=6$d2
<TITLE> Hello World! </TITLE> %|H]T]s
</HEAD> O
MQ?*^eA
<BODY> ~`BkCTT
<p>Hello World!</p> }@6Ze$>
</BODY> feyc
</HTML> 5OWyxO3{
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5T.U=_ag
INTERCAL $>#0RzU
PLEASE DO ,1 <- #13 u4FD}nV
DO ,1 SUB #1 <- #238 (mP{A(kwJ
DO ,1 SUB #2 <- #112 EoJ\Jk
DO ,1 SUB #3 <- #112 nyPeN?-
DO ,1 SUB #4 <- #0 rGNa[1{kRs
DO ,1 SUB #5 <- #64 rAP="H<