“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。 "!B\c9q
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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》。 =j"bLX6;
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以下是用不同语言写成的Hello World程序的几个例子: "?M)2,:A
Ada fq[1 |Q
with Ada.Text_Io; use Ada.Text_Io; P!yOA_)as
procedure Hello is AX] cM)w
begin ?Q[b1: ;Lm
Put_Line ("Hello, world!"); ujf]@L?
end Hello; Djr/!j
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汇编语言 i )!+`w*Y
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x86 CPU,DOS,TASM vNQ|tmn
MODEL SMALL ]p@q.P
IDEAL '!"rE1e
STACK 100H +7mUX
0<)Ep~!
DATASEG YM,UM>
HW DB 'Hello, world!$' 4d8}g25C
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CODESEG _&RGhA
MOV AX, @data aQj"FUL
MOV DS, AX LYke\/ md
MOV DX, OFFSET HW {yFMY?6rf
MOV AH, 09H A\})H
INT 21H .1f!w!ltVR
MOV AX, 4C00H AbL(F#{
INT 21H :0kKw=p1R
END zmhAeblA
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x86 CPU,GNU/Linux,NASM +fN2%aC
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). f{-,"6Y1
;Enter this into "hello.asm" then type: ui80}%
;"nasm -f elf hello.asm" XZ"oOE0=
;"ld hello.o -o hello" ~g}blv0q+B
;"./hello" 7|k2~\@q
E
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section .data ;data section declaration Z~ K} @
msg db 'Hello World!',0AH -Dwe,N"{2
len equ $-msg ;string length gNC'kCx0c
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section .text ;code section declaration wlDo(]mj=O
global _start ;entry point (start of execution) kyf(V)APPu
_start: mov edx,len ;string length "iJAM`Hi
mov ecx,msg ;string start P! P` MX
mov ebx,1 ;file handle: stdout em2Tet
mov eax,4 ;sys_write 24*3m&fA*K
int 80h ;kernel system call X([@}ren
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mov ebx,0 ;return value s
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mov eax,1 ;sys_exit g&\;62lV%
int 80h ;kernel system call L+Gi
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x86 CPU,Windows,MASM32 Pk5 %lu
.386 CVZ4:p
.model flat,stdcall E O "
option casemap:none = gcZ RoL
;Include 文件定义 P0rdGf 5T
include windows.inc ppu<k N
include user32.inc 0ke1KKy/d
includelib user32.lib fO837
include kernel32.inc ~Fo`Pr_
includelib kernel32.lib W$`
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;数据段
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.data 5a/3nsup5
szCaption db 'A MessageBox!',0 Q;@w\_OR
szText db 'Hello,world!',0 )+.AgqxI
;代码段 V /)3d
.code (A;HB@)[A
start: \\/
!I
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ?[
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invoke ExitProcess,NULL ZRUA w,T *
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> G~NhBA9
end start V{{UsEVO
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BEGIN { print "Hello, world!" } 72y!cK6
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BASIC V.[b${
传统版BASIC(例如GWBASIC): #|lVQ@=
7.C]ZcU
10 PRINT "Hello, world!" UL" <V
20 END 5JZZvc$au
* =O@D2g0
或在提示符输入: 'eoI~*}3WQ
qche7kg!a
?"Hello, world!":END 2aQ}|
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现代版BASIC(例如Quick BASIC): 6.4,Qae9E
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Print "Hello, world!" !v 3wl0
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以下的语句在Quick BASIC中同样有效: g:"Hg-s
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? "Hello,world!" ;<`
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BCPL ::8E?c
GET "LIBHDR" POQ1K
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LET START () BE +'I8COoiv%
$( fGLOXbsA
WRITES ("Hello, world!*N") 5{6ebq55"
$) 4>@-1nt}
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Befunge mH3{<^Z6
"!dlrow olleH">v Bb/aeLv
, F[OBPPQ3
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Brainfuck ~9ILN~91
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< cl-i6[F
+++++++++++++++.>.+++.------.--------.>+.>. h-h}NCP
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C kLqFh<
#include <stdio.h> iJE|u
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int main(void) gf2w@CVF>=
{ Bj7\{x,?
printf("Hello, world!\n"); _V|'iz9.
return 0; Jq`fD~(7
} w02HSQ
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C++ P-`^I`r
#include <iostream> ig/716r|
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int main() RN:#+S(8
{ Fk(0q/b
std::cout << "Hello, world!" << std::endl; LDvF)Eg
return 0; C 127he
} 90aPIs-
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j)IK
C++/CLI |_2ANWHz
int main() Da-(D<[0
{ |H_)u
System::Console::WriteLine("Hello, world!"); 6eK^T=
} Yhw* `"X
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C# (C Sharp) ^Q :K$!
class HelloWorldApp HIa$0g0J
{ JN KZ'9
public static void Main() T*T.\b
{ C${TC+z
System.Console.WriteLine("Hello, world!"); 8:xQPd?3
} WNYLQ=;
} -X}R(.}x
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NJtB ;
COBOL T&23Pf 1
IDENTIFICATION DIVISION. [sk"2
PROGRAM-ID. HELLO-WORLD. uATBt
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ENVIRONMENT DIVISION. \%Smp2K
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DATA DIVISION. sk3;;<H
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PROCEDURE DIVISION. BmJ?VJ}Y
DISPLAY "Hello, world!". aBC[(}Pb]
STOP RUN. T?ZMmUE
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Common Lisp r4lG 5dV
(format t "Hello world!~%") 1<p"z,c
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g:clSN,
DOS批处理 ^,5.vfES
@echo off D_)vGvv3;.
echo "Hello, world!" m #eD v*
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Eiffel FS}z_G|4]
class HELLO_WORLD W*m[t&;
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creation X m3t
xp#
make
rh_({rvQ
feature I{PN6bn{>
make is Vel;t<1
local 80EY7#r@w
io:BASIC_IO ("oA{:@d
do &F}+U#H
!!io kt#W~n
io.put_string("%N Hello, world!") B# fzMaC
end -- make \d+HYLAJn
end -- class HELLO_WORLD eQx"nl3U%
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Erlang lRr-S%
-module(hello). o%%fO
-export([hello_world/0]). h;KK6*Z*$E
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hello_world() -> io:fwrite("Hello, World!\n"). >i%w'uU
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Forth jZ!JXmVV
." Hello, world!" CR ,9qB}HG
y^\#bpq&\
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Fortran h$k3MhYDes
WRITE(*,10) *"\Q ~#W
10 FORMAT('Hello, World!') 0gD0}nH
STOP ELF`uWGE
END Ekme62Q>u
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HTML Ib8i#D V
<HTML> q'U5QyuC
<HEAD> qo-F9u1J
<TITLE> Hello World! </TITLE> y
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</HEAD> A'1AU:d
<BODY> Sp,Q,Q4
<p>Hello World!</p> [B3aRi0AQ
</BODY> EE6|9K>
</HTML> aX)./
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INTERCAL {IHK<aW
PLEASE DO ,1 <- #13 2^#UO=ct
DO ,1 SUB #1 <- #238 B8AzN9v&"N
DO ,1 SUB #2 <- #112 .00=U;H%`
DO ,1 SUB #3 <- #112 4F,Ql"ae(
DO ,1 SUB #4 <- #0 1bZiPG{
DO ,1 SUB #5 <- #64 u?;Vxh3@|
DO ,1 SUB #6 <- #238 ^;$a_$|
DO ,1 SUB #7 <- #26 +`zi>=
DO ,1 SUB #8 <- #248 !u{"] T:
DO ,1 SUB #9 <- #168 yCCw<