“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。 a/>={mbKi
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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》。 i~ zL,/O8
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以下是用不同语言写成的Hello World程序的几个例子: +de.!oY
Ada LLaoND6
with Ada.Text_Io; use Ada.Text_Io; o*5|W9
procedure Hello is 0r:8ni%cL
begin ]<++w;#+x
Put_Line ("Hello, world!"); h2h$UZIv
end Hello; V1#/+~
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汇编语言 mIl^
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x86 CPU,DOS,TASM l3l[jDa, 2
MODEL SMALL [dOPOA/d
IDEAL F4">go
STACK 100H Z1^S;#v
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DATASEG 8.]dThaq
HW DB 'Hello, world!$' vP88%I;
2 B5kpmH:
CODESEG @f{)]I +f
MOV AX, @data [4t_ 83
MOV DS, AX f[h=>O
MOV DX, OFFSET HW =We}&80x
MOV AH, 09H n#Z6 d`
INT 21H U/|B IF
MOV AX, 4C00H d3^LalAp
INT 21H F!^ Y!Y@H
END s^3t18m&1
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x86 CPU,GNU/Linux,NASM B\Rq0N]' M
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ]'2p"A0U
;Enter this into "hello.asm" then type: 2B_6un];W
;"nasm -f elf hello.asm" x\XgQQ]-
;"ld hello.o -o hello" V#1_jxP)Q
;"./hello" 0K'lr;
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section .data ;data section declaration V; 1r
msg db 'Hello World!',0AH rm>;B
*;
len equ $-msg ;string length v#.FK:u}
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section .text ;code section declaration >\K<q>*
global _start ;entry point (start of execution) /d5_-AB(v
_start: mov edx,len ;string length a\\B88iRRZ
mov ecx,msg ;string start 4@|K^nT`
mov ebx,1 ;file handle: stdout -vI?b#
mov eax,4 ;sys_write .b]g#Du=
int 80h ;kernel system call Z9ciS";L
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mov ebx,0 ;return value j-ugsV`2=*
mov eax,1 ;sys_exit tnbaU%;|J
int 80h ;kernel system call L1`^~m|
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x86 CPU,Windows,MASM32 cD8.rRyD
.386 Q{!lLka
.model flat,stdcall k+44ud.j
option casemap:none N10'./c K
;Include 文件定义 geWis(#J
include windows.inc =/J4(#Xb
include user32.inc z.eqOPW
includelib user32.lib a=k+:=%y
include kernel32.inc XZuJ<]}X,
includelib kernel32.lib a=gTGG"9
;数据段 z-uJ+SA
.data zzuDI_,/
szCaption db 'A MessageBox!',0 B4R!V!Z*
szText db 'Hello,world!',0 <\?ySto
;代码段 Wt"@?#L
.code n.67f
start: iwCnW7:
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK o(>!T=f
invoke ExitProcess,NULL [9a0J):w{
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end start oo3ZYA
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j DcE_55o
AWK ;=hl!CB
BEGIN { print "Hello, world!" } b]~X
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BASIC ~*Ve>4
传统版BASIC(例如GWBASIC): HGB96,o f9
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10 PRINT "Hello, world!" M9]O!{sq
20 END gGN[AqR
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或在提示符输入: >Fz_]z
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?"Hello, world!":END gPe*M =iF
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现代版BASIC(例如Quick BASIC): w@.E}%bwq
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Print "Hello, world!" b0x9}
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以下的语句在Quick BASIC中同样有效: {8Hrb^8!
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? "Hello,world!" qDhz|a#
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BCPL 6*kY7
GET "LIBHDR" Mc~(S$FU$
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LET START () BE "Z }'u2%\m
$( l+bP48
WRITES ("Hello, world!*N") Hy|$7]1
$) %S$`cp
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Befunge =bZ>>-<
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#include <stdio.h> 9/{+,RpC
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int main(void) .gv J;A7
{ JV/K ouL
printf("Hello, world!\n"); 4cr
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return 0; W4QVWn %3
} P00d#6hPJ
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C++ 8 ]dhNA5
#include <iostream> p<`q^D
,/m<= `*N|
int main() Io5-[d
{ |
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std::cout << "Hello, world!" << std::endl; \5k[ "8~
return 0; hBLJKSv
} nC qUg_{D
my[)/'
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C++/CLI UALwr>+VJ
int main() WA8Qt\Q
{ 6WgGewn
System::Console::WriteLine("Hello, world!"); jkFS=eonK
} r{#od
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C# (C Sharp) D+LeZBJ
class HelloWorldApp X"y rA;,o
{ ,@khV
public static void Main() ]3NH[&+
{ "|]'\4UdzQ
System.Console.WriteLine("Hello, world!"); u#\=g:
} x{Gb4=?l
} TRcY!
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COBOL O:+#k-?
IDENTIFICATION DIVISION. <3LyNG.
PROGRAM-ID. HELLO-WORLD. KU"?ZI
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ENVIRONMENT DIVISION. l-XiQ#-{
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DATA DIVISION. :7e2O!zH_
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PROCEDURE DIVISION. 7cK#fh"hvg
DISPLAY "Hello, world!". ]N:SB
STOP RUN. /$! /F@^
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Common Lisp .2C}8GGC'
(format t "Hello world!~%") Fm`hFBKW
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DOS批处理 *,%H1)Tj}
@echo off E O52 E|
echo "Hello, world!" cnnlEw/&
c`#E#
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Eiffel Ib*l{cxN
class HELLO_WORLD s!9.o_k
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creation w[uK3A v
make YS{])+s
feature fk5!/>X
make is fS>W-
local W7WHH \L/O
io:BASIC_IO oR[,?qu@f
do ipQJn_:2
!!io wlAlIvIT
io.put_string("%N Hello, world!") 8%_XJyg
end -- make [kt!\-
end -- class HELLO_WORLD 9Y&n$svB
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Erlang 54JZEc
-module(hello). lV?rC z
-export([hello_world/0]). W% YJ.%I
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hello_world() -> io:fwrite("Hello, World!\n"). AZ(["kh[
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Forth ~Hd{+0
." Hello, world!" CR k v,'9z
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