“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。 eXMl3Lxf
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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》。 ; J8 25CE
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以下是用不同语言写成的Hello World程序的几个例子: 5VW*h
Ada cin3)lm
with Ada.Text_Io; use Ada.Text_Io; 6Q9S~YYq
procedure Hello is Q |^c5
begin b=Y3O
Put_Line ("Hello, world!"); l
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end Hello; GK:pt8=
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汇编语言 L@6T~
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x86 CPU,DOS,TASM :@+@vM;gh
MODEL SMALL 7(KVA1P66
IDEAL "_e/O&-cH
STACK 100H GZ/vUe
,?s:s&4
DATASEG >"+bL6#
HW DB 'Hello, world!$' 44cy_
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CODESEG NeY,Of|
MOV AX, @data woR }=\K
MOV DS, AX kM/;R)3t4/
MOV DX, OFFSET HW ;923^*\:F{
MOV AH, 09H Mhze!!
INT 21H b
`.h+=3
MOV AX, 4C00H Hsz).u
INT 21H '}
LAZQ"
END )wz3m L
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x86 CPU,GNU/Linux,NASM QsH Fk5)
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). JD$;6Jv3P
;Enter this into "hello.asm" then type: ziui
;"nasm -f elf hello.asm" QOY M/1U
;"ld hello.o -o hello" 8&9'1X5)8_
;"./hello" ;yg9{"O
7 {#^zr
section .data ;data section declaration Tof H=d
msg db 'Hello World!',0AH j4.deQ,
len equ $-msg ;string length 4';(\42
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section .text ;code section declaration 4
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global _start ;entry point (start of execution) }z8HS<
#Q
_start: mov edx,len ;string length `=cOTn52
mov ecx,msg ;string start 9dD;Z$x&Xk
mov ebx,1 ;file handle: stdout zAdZXa[MRY
mov eax,4 ;sys_write ;?0r,0l2$
int 80h ;kernel system call uPtS.j=
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mov ebx,0 ;return value 2s:$4]K D
mov eax,1 ;sys_exit }N<> z
int 80h ;kernel system call G8_|w6
. 'rC'FT
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x86 CPU,Windows,MASM32 O<?z\yBtS^
.386 -|~tZuf
.model flat,stdcall ,BG
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option casemap:none %t\~3pw=
;Include 文件定义 ThSB\
include windows.inc 'VTLp.~G~
include user32.inc fbK`A?5K
includelib user32.lib $'>h7].
include kernel32.inc 1 ojy_
includelib kernel32.lib /DBldL7yi
;数据段 Qcf5*]V
.data W{v-(pW
szCaption db 'A MessageBox!',0 )mw&e}jRV
szText db 'Hello,world!',0 41V}6+$g
;代码段 1WW`%
.code Iib39?D W
start: i5 F9*
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK R87e"m/C%
invoke ExitProcess,NULL B> LL
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Ho; bgva
end start |}>;wZ[7
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AWK !3'&_vmG$
BEGIN { print "Hello, world!" } @(mXiK
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c={bunnz#
BASIC 'P^6H$0
传统版BASIC(例如GWBASIC): uY6|LTK&x
cc^ [u+
10 PRINT "Hello, world!" !:^lTvYWZH
20 END hqKftk)+
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或在提示符输入: CUR70[pB)
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?"Hello, world!":END } QqmDK.
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现代版BASIC(例如Quick BASIC): 8XUm.nV
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Print "Hello, world!" p7pJ90~E
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以下的语句在Quick BASIC中同样有效: 3 O)^Hq+9
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? "Hello,world!" WI$MT6
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BCPL nd[{DF?)/
GET "LIBHDR" LT3ViCZ-n
/M1 /
LET START () BE XJ`!d\WL/!
$( kCu" G
WRITES ("Hello, world!*N") VkNg Vjg
$) W_E0+
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o=1M<dL
Befunge 6?3f+=e"~!
"!dlrow olleH">v =V@5W[bV
, ~j`;$o
^_@ A #y,B
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+++++++++++++++.>.+++.------.--------.>+.>. .cV<(J 5o
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C uP-I7l0i1
#include <stdio.h> v{Rj,Ou
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int main(void) 2)A% 'Akf
{ 1$*ZN4
printf("Hello, world!\n"); "0(H! }D
return 0; Vu/{Hr
} C#r1zr6
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C++ ;e>pu"#
#include <iostream> o-))R| ~z
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int main() \C
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{ ?4kM5NtP
std::cout << "Hello, world!" << std::endl; t@`w}o[#
return 0; _i=431Z40
} 7$l! f
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C++/CLI KZ"&c~[
int main() {*Ag[HS0u
{ Gd:TM]rJ
System::Console::WriteLine("Hello, world!"); F.s*^}L[
} ^ *{:;F@
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C# (C Sharp) V6:S<A
class HelloWorldApp `FjU2
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{ J 8z|ua
public static void Main() "h-G=vo,kl
{ [f^:V:){
System.Console.WriteLine("Hello, world!"); g9A8b(>F&@
} 6`tc]a"#Zb
} @2LpI*]C
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COBOL 7wivu*0
IDENTIFICATION DIVISION. Md4hd#z
PROGRAM-ID. HELLO-WORLD. HinPO
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ENVIRONMENT DIVISION. Z#O )0ou
ps DY}y\"
DATA DIVISION. b"lzR[X,e
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PROCEDURE DIVISION. m44"qp
DISPLAY "Hello, world!". H%L oI)w
STOP RUN. V__|NVoOm
C#^V<:9
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Common Lisp =N62 ){{
(format t "Hello world!~%") e
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DOS批处理 _(U|Kpi
@echo off ^V1 .Y
echo "Hello, world!" \iBEyr]
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B_gzpS]
Eiffel kqebU!0-
class HELLO_WORLD ~o_zV'^f@o
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creation Hwz.5hV"
make [tKH'}/s=
feature q X"Pg
make is qhdY<[6
local FZt a
io:BASIC_IO d@$]/=%
do /IO<TF(X
!!io \]j{
io.put_string("%N Hello, world!") o9<)rUy
end -- make ,P%a0\
end -- class HELLO_WORLD {Wi)/B}
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