“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。 ;X3bgA']
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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》。 (t)a u
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以下是用不同语言写成的Hello World程序的几个例子: {n>W8sN<
Ada bfjtNF*^
with Ada.Text_Io; use Ada.Text_Io; *z
A1 NH5
procedure Hello is UA}oOteG
begin 2r=A'
Put_Line ("Hello, world!"); d4zqLD$A
end Hello; ^d2bl,1
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汇编语言 Lcyj,R
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x86 CPU,DOS,TASM $w$4RQk3n
MODEL SMALL 7EAkY`Op
IDEAL [8QE}TFic
STACK 100H pP6pn~}
n7S~nk
DATASEG Eo }mSd
HW DB 'Hello, world!$' \;G 97o
b 64~Y|8
CODESEG l1qWl
MOV AX, @data 7BhRt8FSD+
MOV DS, AX h[O!kwE
MOV DX, OFFSET HW oLXQ#{([
MOV AH, 09H D'823,-).
INT 21H Y"&c .
MOV AX, 4C00H c*g(R.!
INT 21H ]+B#SIC;
END V0h
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x86 CPU,GNU/Linux,NASM 85fBKpEe
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). z;_d?S<*m
;Enter this into "hello.asm" then type: 0#mu[O
;"nasm -f elf hello.asm" &\0`\#R
;"ld hello.o -o hello" u&>o1!c*P
;"./hello" P:")Qb2
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section .data ;data section declaration e>kw>%3bl9
msg db 'Hello World!',0AH E30VKh |
len equ $-msg ;string length J!:ss
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section .text ;code section declaration (Js'(tBhiU
global _start ;entry point (start of execution) r$*p
_start: mov edx,len ;string length %HJ_0qg
mov ecx,msg ;string start N*Owfr1N
mov ebx,1 ;file handle: stdout ;Vad| -
mov eax,4 ;sys_write K6.*)7$#
int 80h ;kernel system call " (+>#
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mov ebx,0 ;return value K/y#hP
mov eax,1 ;sys_exit '~E&^K5hr
int 80h ;kernel system call [lsr[`SJ<
q
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x86 CPU,Windows,MASM32 (,E.1j]ji
.386 shlL(&Py
.model flat,stdcall .jhuC#x{/
option casemap:none #GYCU!
;Include 文件定义 r)dT,X[}F
include windows.inc $zTjh~ 9
include user32.inc wL2d.$?TEg
includelib user32.lib CW Y'q
include kernel32.inc tF)aNtX4^
includelib kernel32.lib L44-: 3
;数据段 a<[@p
.data 1@H3!V4
szCaption db 'A MessageBox!',0 _AQ :<0/#
szText db 'Hello,world!',0 :CN,I!:
;代码段 hIw<gb4J%
.code qPpC )6-Q
start: 5vL]Y)l
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK AR?J[e
invoke ExitProcess,NULL Nvs8t%
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ;fhFv&`mE
end start &Q^M[X
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AWK ejwFQ'wTx
BEGIN { print "Hello, world!" } d;ElqRC&
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BASIC ;b$(T5
传统版BASIC(例如GWBASIC): #nc{MR#R
& h9ji[
10 PRINT "Hello, world!" n-dO |3,
20 END //W<\
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或在提示符输入: 0 )#5_-%
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?"Hello, world!":END [t
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现代版BASIC(例如Quick BASIC): :JSOj@s
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Print "Hello, world!" 16 o3ER
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以下的语句在Quick BASIC中同样有效: &gkloP@
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? "Hello,world!" Gu&?Gn oc
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BCPL U]fE(mpI9
GET "LIBHDR" pHY~_^B4&
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LET START () BE i
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WRITES ("Hello, world!*N") _ 9Tv*@
$) <?,o
{
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Befunge /+Xv(B
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C .-[UHO05^8
#include <stdio.h> *:3flJt
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int main(void) GLt#]I"LY
{ ooByGQ90V:
printf("Hello, world!\n"); )=;0
return 0; on+
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} BULX*eOt
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C++ $ W(m
#include <iostream> &?/h#oF@\
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int main() ju(&v*KA
{ s*:J=+D]G
std::cout << "Hello, world!" << std::endl; VLN=9
return 0; :sFP{rFx~
} CfoSow-
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C++/CLI #~q{6()e:
int main() mKPyM<Q
{ L\5j"]
}`
System::Console::WriteLine("Hello, world!"); Ezm ~SY
} 1/3Go97/qV
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C# (C Sharp)
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class HelloWorldApp W j/.rG&tE
{ $k V^[
public static void Main() }f<.07
{ ykxjT@[
System.Console.WriteLine("Hello, world!"); 2md1GWyP
} n!&DLB1z
} k(><kuJ`3
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COBOL r@H<@Vuc
IDENTIFICATION DIVISION. 'u{m37ZJ
PROGRAM-ID. HELLO-WORLD. uY,&lX+!
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ENVIRONMENT DIVISION. oJUVW"X6
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DATA DIVISION. S>aN#
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PROCEDURE DIVISION. ATv.3cy
DISPLAY "Hello, world!". UW<V(6P
STOP RUN. # h]m8
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Common Lisp k ;R*mg*K
(format t "Hello world!~%") l];,)ddD9
D!ToCVos
/);cl;"
DOS批处理 A{Z=[]r1`E
@echo off /,f*IdB
echo "Hello, world!" DHW;*A-
^UZEdR;
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Eiffel H ZIJKk(
class HELLO_WORLD `B"=\0
+n %uIv
creation .%h.b6^
make B9/x?Jv1
feature '%yWz)P
make is s@E"EWp0
local } '. l'%
io:BASIC_IO #qGfo)
do ;+g
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!!io >lU[
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io.put_string("%N Hello, world!") 4iBp!k7
end -- make "~9 !o"
end -- class HELLO_WORLD ;WC]Lf<Z^
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Erlang Pq>r|/~_
-module(hello). AKC';J
-export([hello_world/0]). O7I:Y85i#O
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hello_world() -> io:fwrite("Hello, World!\n"). E9;cd$}K
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Forth znw\Dn?g
." Hello, world!" CR @Nn9-#iW
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Fortran (n05MwKu\
WRITE(*,10) t?L;k+sMM
10 FORMAT('Hello, World!') 9w^1/t&=04
STOP M2(+}gv;7p
END \]e"#"v}}_
}+h/2D
^I@1y}xi
HTML ZWQrG'$?o8
<HTML> <LIL{g0eX
<HEAD> UJ1iXV[h"
<TITLE> Hello World! </TITLE> BK]bSj
</HEAD> n$g g$<
<BODY> DnS#
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<p>Hello World!</p> zdrCr0Rx,
</BODY> &*B=5W;6^u
</HTML> 2--"@@
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INTERCAL w7cciD|
PLEASE DO ,1 <- #13 +VkhM;'"C
DO ,1 SUB #1 <- #238 ?D]4*qsIlu
DO ,1 SUB #2 <- #112 Sg(fZ' -
DO ,1 SUB #3 <- #112 ~^cx a%
DO ,1 SUB #4 <- #0 ,
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DO ,1 SUB #5 <- #64
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DO ,1 SUB #6 <- #238 ;|6kFBGC"+
DO ,1 SUB #7 <- #26 m!3b.2/h
DO ,1 SUB #8 <- #248 +!6aB|-
DO ,1 SUB #9 <- #168 "rOe J~4 X
DO ,1 SUB #10 <- #24 $@"o BCc
DO ,1 SUB #11 <- #16 ,4zwd@&O
DO ,1 SUB #12 <- #158 3`S|I_$(T"
DO ,1 SUB #13 <- #52 ?F1NZA[%t
PLEASE READ OUT ,1 >j5)
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Java fNNkc[YTZI
public class Hello ^I=c]D]);
{ ?Y7'OlO
public static void main(String[] args) tfW/Mf
{ swJ3_WhbdT
System.out.println("Hello, world!"); \Y&* sfQ
} OvqCuX
} CB{%~
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^m.QW*
JSP WeNx9+2=Z
<% s+&Ts|c#
out.print("Hello, world!"); :Fz;nG-G
%> ? piv]Z
{</MC`
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MIXAL SIv8EMGo
TERM EQU 19 the MIX console device number "jqC3$DKI
ORIG 1000 start address >Ig%|4Hw
START OUT MSG(TERM) output data at address MSG LW<