“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。 ?,TON5Fl-
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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》。 :W 8DgL>l
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以下是用不同语言写成的Hello World程序的几个例子: YM/^-[k3
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with Ada.Text_Io; use Ada.Text_Io; s3Y
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procedure Hello is ZOyq{w!2
begin "{AS5jw
Put_Line ("Hello, world!"); I4gyGg$H
end Hello; YjoN:z`b
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汇编语言 66Huqo
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x86 CPU,DOS,TASM $yI!YX&
MODEL SMALL ?:~Y%4;
IDEAL Skq%S`1%Q
STACK 100H Ri"3o
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DATASEG }"2
0:
HW DB 'Hello, world!$' O83vPK
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CODESEG VLkK6W.u
MOV AX, @data ;:a7rN"(
MOV DS, AX +wgNuj0=*
MOV DX, OFFSET HW gBf%9F
MOV AH, 09H {{SeD:hx
INT 21H l%rwJLN1
MOV AX, 4C00H 8lT.2H
INT 21H b_z;^y~
END y`! 3Z} 7
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x86 CPU,GNU/Linux,NASM zgJ%Zr!~
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Cj31'
;Enter this into "hello.asm" then type: Y_xPr%%A
;"nasm -f elf hello.asm" GadQ \>
;"ld hello.o -o hello" wBA[L}
;"./hello" 9Psy$
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section .data ;data section declaration $
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msg db 'Hello World!',0AH CT6a
len equ $-msg ;string length P}KyT?X:
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section .text ;code section declaration #xNLr
global _start ;entry point (start of execution) =k2In_
_start: mov edx,len ;string length bWW$_Spr
mov ecx,msg ;string start ]b-Z;Nce
mov ebx,1 ;file handle: stdout "P~0 7
mov eax,4 ;sys_write k]] (I<2
int 80h ;kernel system call x{6/di
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mov ebx,0 ;return value 4M}u_}9
mov eax,1 ;sys_exit F9^8/Z
int 80h ;kernel system call N;9@-Tb
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x86 CPU,Windows,MASM32 Y\Odj~Mj
.386 2n2{Oy>L
.model flat,stdcall `u3to{
option casemap:none $,bLK|<hi
;Include 文件定义 9P#E^;L
include windows.inc _iO,GT=J-
include user32.inc W8'cAY
includelib user32.lib !=V>DgmW
include kernel32.inc [ft#zxCJ
includelib kernel32.lib $21+6
;数据段 Rq%g5lK
.data ?PO~$dUc]
szCaption db 'A MessageBox!',0 fq~<^B
szText db 'Hello,world!',0 ~B'K_#
;代码段 mA|!IhM
.code `i<;5s!rX
start: j{C+`~O
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK P%]li`56-c
invoke ExitProcess,NULL
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Rf+ogLa=
end start %`t;5kmR
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BEGIN { print "Hello, world!" } R+
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BASIC >?ZH[A
传统版BASIC(例如GWBASIC): vd
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10 PRINT "Hello, world!" TPZZln'3
20 END /d ?)
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或在提示符输入: Vv~rgNh
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?"Hello, world!":END c^S^"M|
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现代版BASIC(例如Quick BASIC): {'4h.PB+r
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Print "Hello, world!" -ve{O-;
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以下的语句在Quick BASIC中同样有效: 1a;Le8
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? "Hello,world!" JV=d!Gi[C
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BCPL "45O!AjP
GET "LIBHDR" &~ QQZ]q6
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LET START () BE "Sz pFw
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WRITES ("Hello, world!*N") lJP6sk
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Befunge aT$q1!U`j2
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Brainfuck PsU.dv[
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< POwJhT
+++++++++++++++.>.+++.------.--------.>+.>. QijEb
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C cVv+,l4V0
#include <stdio.h> RbKAB8
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int main(void) .%j(!
{ H)(@A W+-
printf("Hello, world!\n"); P/5bNK!
return 0; Xm`jD'G
} R|
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C++ vi')-1Y
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#include <iostream> OiH
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int main() 4SIi<cS0
{ R}IMX9M=
std::cout << "Hello, world!" << std::endl; Wly-z$\
return 0; mO;X>~K
} t<mT=(zt*
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C++/CLI D[ U[D
int main() &;S.1tg
{ t-*oVX3D
System::Console::WriteLine("Hello, world!"); c-.t8X,5(~
} rK)aR
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C# (C Sharp) KSU?Tg&JR
class HelloWorldApp e0Cr> I5/e
{ 9AK<<Mge.
public static void Main() iD+Q\l;%
{ ":E
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System.Console.WriteLine("Hello, world!"); :M)B#@ c=
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COBOL 12BTZ
IDENTIFICATION DIVISION. h^h,4H\r
PROGRAM-ID. HELLO-WORLD. A@-nn]
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ENVIRONMENT DIVISION. l&2A]5C
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DATA DIVISION. d%VG@./xq
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PROCEDURE DIVISION. H'|b$rP0@
DISPLAY "Hello, world!". H~UxVQLPp
STOP RUN. Njsz=
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Common Lisp :%cL(',Q
(format t "Hello world!~%") ,4wVQ(,?cd
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DOS批处理 MT9c:7}[&
@echo off M7!>-P
echo "Hello, world!" %>B?WR\yE
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Eiffel CnyCEIO-
class HELLO_WORLD qDZ?iTHQq
m?bd6'&FR
creation YSERQo
make xp-.,^q\w
feature p.^glz >B
make is ]7" W(
local mpfc2>6Il.
io:BASIC_IO '7AlE!7%
do Q-o}Xnj*!L
!!io spter35b[
io.put_string("%N Hello, world!") ^*(*tS|M
end -- make A.tONPi
end -- class HELLO_WORLD lj0"2@z3"E
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[mX/]31
Erlang }9yAYZ0q{b
-module(hello). )7@f{E#w
-export([hello_world/0]). Lt>"R! "x
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hello_world() -> io:fwrite("Hello, World!\n"). LdxrS5
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Forth N"Y)
." Hello, world!" CR =>nrU8x
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Fortran :ad
WRITE(*,10) 1vKc>+9
10 FORMAT('Hello, World!') (n:d
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STOP 0gdFXh$!e
END (XW\4msB)I
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HTML 3\_ae2GW
<HTML> K P{|xQ>
<HEAD> B1dVHz#
<TITLE> Hello World! </TITLE> ~ED8]*H|`
</HEAD> ;|_aACina
<BODY> 0G`_dMN
<p>Hello World!</p> Y"~Tf{8
</BODY> Y+5nn
</HTML> 8|kr|l
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INTERCAL 1OB,UU"S$
PLEASE DO ,1 <- #13 )yvI {
DO ,1 SUB #1 <- #238 c'M#va
DO ,1 SUB #2 <- #112 I3 /^{-n
DO ,1 SUB #3 <- #112 [>+R|;ln
DO ,1 SUB #4 <- #0 JGQlx-qv
DO ,1 SUB #5 <- #64 M#o.$+Uh
DO ,1 SUB #6 <- #238 NAd|n+[d
DO ,1 SUB #7 <- #26 4qMqAT
DO ,1 SUB #8 <- #248 :pj00
DO ,1 SUB #9 <- #168 I&JVY8'
DO ,1 SUB #10 <- #24 >iD&n4TK
DO ,1 SUB #11 <- #16 DM
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DO ,1 SUB #12 <- #158 sf{rs*bgp
DO ,1 SUB #13 <- #52 NA%M)u{|
PLEASE READ OUT ,1 H",w$$eF
PLEASE GIVE UP NIZN}DnP
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Java ~2
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public class Hello 533n
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{ E"d\N-I
public static void main(String[] args) WAr;g?Q8
{ t^eWFX
System.out.println("Hello, world!"); "|P8L|
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} K@av32{
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<% O ?`=<W/R
out.print("Hello, world!"); l2&cwjc
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}
MIXAL i-1lpp I
TERM EQU 19 the MIX console device number mZGAl1`8
ORIG 1000 start address .m--#r
START OUT MSG(TERM) output data at address MSG !6y<