“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。 rV?@Kgxi
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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》。 77wod}h!:
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以下是用不同语言写成的Hello World程序的几个例子: 563ExibH
Ada N^k&
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with Ada.Text_Io; use Ada.Text_Io; 7{9M
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procedure Hello is ic l]H
begin =EU;%f
Put_Line ("Hello, world!"); zZey
end Hello; d#W^S[[
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汇编语言 }r;=<mc,O
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x86 CPU,DOS,TASM g`tV^b")
MODEL SMALL "D
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IDEAL NJ;m&Tm,DF
STACK 100H #.C2_MN>
WLta{A?
DATASEG T[c-E*{hR
HW DB 'Hello, world!$'
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zz(EH<>
CODESEG nwqA\
MOV AX, @data 4]-7S l,
MOV DS, AX 02,.UqCz
MOV DX, OFFSET HW q|r*4={^!*
MOV AH, 09H e@/' o/
INT 21H SMfa(+V I
MOV AX, 4C00H A5]yC\*zt
INT 21H e<FMeg7n
END Z`zLrXPD)
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x86 CPU,GNU/Linux,NASM >+>N/`BG
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). %?[0G,JG
;Enter this into "hello.asm" then type: m`]d`%Ex
;"nasm -f elf hello.asm" o02G:!gB
;"ld hello.o -o hello" 1'8-+?r
;"./hello" mgM"u94-]
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section .data ;data section declaration EWv[Sp
msg db 'Hello World!',0AH |WfL'_?$
len equ $-msg ;string length e"*ho[
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section .text ;code section declaration yNU}1_oK
global _start ;entry point (start of execution) {z;4t&5
_start: mov edx,len ;string length " SP6o
mov ecx,msg ;string start Xs'qwL~{`
mov ebx,1 ;file handle: stdout >$)~B4
mov eax,4 ;sys_write =^_a2_BBl
int 80h ;kernel system call G2+ gEg
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mov ebx,0 ;return value BQ70<m2D$
mov eax,1 ;sys_exit 4x@W]*i
int 80h ;kernel system call FV,aQ#
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x86 CPU,Windows,MASM32 %Z,n3iND
.386 Z+[W@5q
.model flat,stdcall f/4DFs{
option casemap:none iun_z$I<+Z
;Include 文件定义 t~) g)=>
include windows.inc 'op_GW
include user32.inc ]<c\+9
includelib user32.lib .~q>e*8AH
include kernel32.inc /^bU8E&^M
includelib kernel32.lib n[# **s
;数据段 7VWy1
.data V?p`rrj@
szCaption db 'A MessageBox!',0 |`{$Ego:
szText db 'Hello,world!',0 i
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;代码段 OPogH=vf
.code rR#wbDr5
start: IY
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invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK HS\'{4P
invoke ExitProcess,NULL bw+IH-b
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end start ?1] \3nj
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BEGIN { print "Hello, world!" } _sy]k A
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BASIC >B*zzj
传统版BASIC(例如GWBASIC): ~,xso0
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10 PRINT "Hello, world!" 0($On`#
20 END 6E^9>
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或在提示符输入: )ZFc5m^+u
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?"Hello, world!":END &F Yv4J
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现代版BASIC(例如Quick BASIC): uK1VFW
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Print "Hello, world!" q(1hY"S"}b
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以下的语句在Quick BASIC中同样有效: Y4X`(\A
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? "Hello,world!" jR@>~t[}o
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GET "LIBHDR" kf9]nIo
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WRITES ("Hello, world!*N") (XFF}~>B.
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#include <stdio.h> |Z+qaq{X
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int main(void) Py/~Q-8p
{ 8=?U7aw
printf("Hello, world!\n"); t3K9 |8<
return 0; x(~V7L>"i
} :/t_5QN
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C++ %afF%y
#include <iostream> <54KWC86)J
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int main() 78?cCj{e
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std::cout << "Hello, world!" << std::endl; Vh]=sd<F
return 0; X gtn}7N.
} L;+e)I]
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C++/CLI jyidNPLm4
int main() t2rZ%[O
{ r@wE?hK
System::Console::WriteLine("Hello, world!"); %*IH~/Ld;]
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C# (C Sharp) ZU2D.Kf_:
class HelloWorldApp wnQi5P+
{ s*eM}d.p
public static void Main() ")nKFs5
{ %/hokyx
System.Console.WriteLine("Hello, world!"); /BhP`a%2Q
} 'GO*6$/
} ,Z7Ky*<j
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COBOL P\z1fscnK
IDENTIFICATION DIVISION. aQzmobleep
PROGRAM-ID. HELLO-WORLD. {BJH}vV1)
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ENVIRONMENT DIVISION. h53G$Ol.
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DATA DIVISION. rhGB l`(B
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PROCEDURE DIVISION. 54RexB o
DISPLAY "Hello, world!". u^x<xw6f
STOP RUN. Qp2~ `hD
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Common Lisp mJH4M9WJ]
(format t "Hello world!~%") [[]NnWJ
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DOS批处理 ,">CPl]
@echo off ^W^Y"0y9`
echo "Hello, world!" ?iHcY,
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Eiffel 0TiDQ4}i[
class HELLO_WORLD z:)*Aobwv
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creation `q1-yH0~4
make
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feature Z 8GIZ
make is w[EEA_\
local n-<`Z NMU
io:BASIC_IO %(s2{$3
do ma"M? aM
!!io A v;NQt8ut
io.put_string("%N Hello, world!") 1 7iw`@
end -- make Y'R/|:YL@
end -- class HELLO_WORLD c^5fhmlt
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Erlang P;|63"U
-module(hello). XZ3M~cDq
-export([hello_world/0]). blaXAqe
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hello_world() -> io:fwrite("Hello, World!\n"). <N=ow"rD
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Forth K;TTGK
." Hello, world!" CR (@O,U
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Fortran Us>
WRITE(*,10) +|4olK$[
10 FORMAT('Hello, World!') 4~WSIR-
STOP zXwdU58
END ,.Lo)[(
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HTML a^VI)
<HTML> v)*eLX$
<HEAD> a"k,x-EL(
<TITLE> Hello World! </TITLE> !8RJHMX&
</HEAD> =~dsIG
<BODY> ER4#5gd
<p>Hello World!</p> 7EL0!:P p3
</BODY> X'2%'z<
</HTML> @Qqf4h
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INTERCAL s:tWEgZk?
PLEASE DO ,1 <- #13 T%YN(f
DO ,1 SUB #1 <- #238 \,I{*!hw
DO ,1 SUB #2 <- #112 ZCfd<NS?
DO ,1 SUB #3 <- #112 }MM:q R
DO ,1 SUB #4 <- #0 1O90 ]c0
DO ,1 SUB #5 <- #64 fECmELd
DO ,1 SUB #6 <- #238 = mhg@N4
DO ,1 SUB #7 <- #26 Yg1HvSw\
DO ,1 SUB #8 <- #248 Z/;8eb*B7
DO ,1 SUB #9 <- #168 QxBH{TG
DO ,1 SUB #10 <- #24 ya;(D 8x)
DO ,1 SUB #11 <- #16 FGpV
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DO ,1 SUB #12 <- #158 J]Q-#g'Z
DO ,1 SUB #13 <- #52 h?GE-F
PLEASE READ OUT ,1 2k`Q+[?{q>
PLEASE GIVE UP ~k ]$J|}za
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Java ~BXy)IB6
public class Hello 2nSz0 .
{ @,pn/[
public static void main(String[] args) H\|H]: CE
{ Jb8%A@Z+
System.out.println("Hello, world!"); U8zs=tA
} }<