“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。 i%_W{;e
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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: vq)G\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: }F!tM"X\
Ada *|{1`{8n
with Ada.Text_Io; use Ada.Text_Io; J&CA#Bg:w
procedure Hello is }`ox;Q
begin Z@2^> eC
Put_Line ("Hello, world!"); Xia4I*
*
end Hello; R.@ I}>
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汇编语言 Gf_Je
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x86 CPU,DOS,TASM |J-Osi
MODEL SMALL eS-akx^@
IDEAL cc- liY"
STACK 100H />Kd w
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DATASEG \5M1;
HW DB 'Hello, world!$' Q=9Ce@[
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CODESEG 6|:K1bI)
MOV AX, @data `yJ3"{uO
MOV DS, AX h]T
MOV DX, OFFSET HW f@yInIzRJ
MOV AH, 09H WVyk?SBw
INT 21H )-VpDW!%_
MOV AX, 4C00H kn<IWW_t
INT 21H o5LyBUJ
END ;}1O\nngR
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x86 CPU,GNU/Linux,NASM )
rw!. )
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). _}+Aw{7!r
;Enter this into "hello.asm" then type: ^% ZbjJ7|j
;"nasm -f elf hello.asm" IJ\4S
;"ld hello.o -o hello" q> |&u
;"./hello" "QSmxr
" b3-'/&
section .data ;data section declaration WN#S%G:Q)
msg db 'Hello World!',0AH U/}YpLgdD
len equ $-msg ;string length |?A:[C#X
H j [!F%
section .text ;code section declaration ^G(U@-0..
global _start ;entry point (start of execution) =d`w~iC
_start: mov edx,len ;string length MTXh-9DA
mov ecx,msg ;string start ^E~F,]dV=
mov ebx,1 ;file handle: stdout Hq$&rNnq\
mov eax,4 ;sys_write gZq_BY_U
int 80h ;kernel system call fVf
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mov ebx,0 ;return value ":@\kw
mov eax,1 ;sys_exit ~'1gX`o:
int 80h ;kernel system call &A}hx\_T
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x86 CPU,Windows,MASM32 4j|IG/m
.386 y'L7o
V?L9
.model flat,stdcall hZ_@U?^
option casemap:none VOJA}$
;Include 文件定义 cYmgJBG
include windows.inc -.xiq0
include user32.inc B SH2Kq
includelib user32.lib *T6*Nxs0k
include kernel32.inc ci
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includelib kernel32.lib ~aPe?{yIUa
;数据段 f8e :J#jbS
.data hk+8s\%-
szCaption db 'A MessageBox!',0 ?7=c`
szText db 'Hello,world!',0 %(&$CmS@
;代码段 j%+>y;).
.code \)$:
start: @*Tql:Qcd^
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK >piVi[`
invoke ExitProcess,NULL -\<\OV:c*
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CS'LW;#[
end start U7#C. Z
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BEGIN { print "Hello, world!" } W{m_yEOf
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BASIC %u}#|+8}
传统版BASIC(例如GWBASIC): -*A1[Z ?
<$(y6+lY
10 PRINT "Hello, world!" }1
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20 END ]sTb Ew.[
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或在提示符输入: po\(O8#5U
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?"Hello, world!":END "%}24t%
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现代版BASIC(例如Quick BASIC): @r&*Qsf|
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Print "Hello, world!" N TcojA{V$
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以下的语句在Quick BASIC中同样有效: YdDP;,
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? "Hello,world!" Jxf>!\:AZu
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O^J=19Ri
BCPL qv^P
GET "LIBHDR" nW)?cQ
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AL !ppi
LET START () BE sZI"2[bk
$( 0qINa:Ori
WRITES ("Hello, world!*N") EXMW,
$) >?O?U=:<
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Befunge 7Kf
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Brainfuck X J`*dgJ
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Xdi<V_!BC-
+++++++++++++++.>.+++.------.--------.>+.>. qV9}N-sS
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#include <stdio.h> eC"k-a8j+
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int main(void) denxcDFu/~
{ {#st>%i
printf("Hello, world!\n"); NN#k^[i1
return 0; 4> uN H5
} n}b{u@$
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C++ lz!(OO,g
#include <iostream> 6cd!;Ca
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int main() 2Z(t/Zp>
{ vf zC2
std::cout << "Hello, world!" << std::endl; =;+gge!?bB
return 0; O|S,="h"}
} L(bDk'zi
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C++/CLI ~5&B#Sm[G
int main() #K0/ >W
{ )!kt9lK
System::Console::WriteLine("Hello, world!"); tA^+RO4
} ZJF"Yo
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C# (C Sharp) 'z^'+}iyv
class HelloWorldApp }W@refS
{ (kVY\!UAt
public static void Main() ]isq}Qv~
{ >|, <9z`D
System.Console.WriteLine("Hello, world!"); P4HoKoj2`
} 7m
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} <jh7G
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COBOL D_?Tj
IDENTIFICATION DIVISION. KTt+}-vP^
PROGRAM-ID. HELLO-WORLD. L@z[b^
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ENVIRONMENT DIVISION. g4=C]\1
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DATA DIVISION. Ux1j +}y
ysZ(*K
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PROCEDURE DIVISION. q_6lD~~q^
DISPLAY "Hello, world!". sZ~03QvkT
STOP RUN. |||m5(`S
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Common Lisp pfu"vo(t_
(format t "Hello world!~%") OwEV$Q
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DOS批处理 I{0cnq/
@echo off !@])Ut@tN
echo "Hello, world!" 0ETT@/)]z
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x]yIe&*('
Eiffel * #E_KW1RV
class HELLO_WORLD [Rub
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creation @54$IhhT~
make x&^Xgi?
feature za}Kd^KeB
make is M*bsA/Z
local Y-Q)sv
io:BASIC_IO (&NLLrsio
do k~so+k&=b
!!io ,t QNL\t
io.put_string("%N Hello, world!") :-#7j}
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end -- make <{8x-zbR+
end -- class HELLO_WORLD "=n%L +6%
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Erlang cWyf04-?
-module(hello). WMnSkO
-export([hello_world/0]). 7D,nxx(`
dl[%C6
hello_world() -> io:fwrite("Hello, World!\n"). 7FkiT
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Forth *J]p/<> {
." Hello, world!" CR \a7m!v
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Fortran O7_y QQAA
WRITE(*,10) S"@6,
10 FORMAT('Hello, World!') 5FuV=Y uc
STOP J/D~]U
END v(R^LqE
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HTML :R
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<HTML> n 7B2rRJH
<HEAD> lK/4"&
<TITLE> Hello World! </TITLE> ,aD~7QX1:
</HEAD> J zFR9DEt
<BODY> *~4<CP+"0
<p>Hello World!</p> o/
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</BODY>
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</HTML> {X2uFw Gi
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INTERCAL 9>0OpgvC(
PLEASE DO ,1 <- #13 nu:l;+,VY
DO ,1 SUB #1 <- #238 cUP1Uolvn
DO ,1 SUB #2 <- #112 O"|d~VQ
DO ,1 SUB #3 <- #112 .b`8
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DO ,1 SUB #4 <- #0 7p\&