“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。 3Y=uBl
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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》。 &24>9
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以下是用不同语言写成的Hello World程序的几个例子: @ ]
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Ada @!::_E+F]
with Ada.Text_Io; use Ada.Text_Io; Z4{~
procedure Hello is B+lnxr0t
begin ?<~P)aVVj
Put_Line ("Hello, world!"); # N'_~:H
end Hello; +?+iVLr!l}
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汇编语言 Q#}c5TjVr
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x86 CPU,DOS,TASM T^H`$;\
MODEL SMALL 0b+End#mp
IDEAL 2x:aMWh
STACK 100H p/Ri|FD6
L lVE5f?
DATASEG T9]:,
z
HW DB 'Hello, world!$' ju(QSZ|;
s3oQ( wC %
CODESEG L%fJH_$_s
MOV AX, @data xB,(!0{`
MOV DS, AX Te@=8-u-
MOV DX, OFFSET HW leO..M
MOV AH, 09H h;t5v6["
INT 21H O*PJr[Zou
MOV AX, 4C00H ThYHVJ[;
INT 21H 5j#XNc)"
END LAv!s/ O$=
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x86 CPU,GNU/Linux,NASM *!L
it:H
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). EALgBv>#ZL
;Enter this into "hello.asm" then type: lU% L
;"nasm -f elf hello.asm" |v= */e
;"ld hello.o -o hello" _rfGn,@BH
;"./hello" kUQdi%3yY;
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section .data ;data section declaration I]0
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msg db 'Hello World!',0AH 'v_VyK*w
len equ $-msg ;string length Dt]*M_
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section .text ;code section declaration "oo
j;
global _start ;entry point (start of execution) U$AV"F&!&}
_start: mov edx,len ;string length ec"+Il
mov ecx,msg ;string start 5Jm%*Wb
mov ebx,1 ;file handle: stdout o :_'R5
mov eax,4 ;sys_write p^?]xD(
int 80h ;kernel system call ql%]t~HR0
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mov ebx,0 ;return value }?=4pGsI
mov eax,1 ;sys_exit FdMxw*}
int 80h ;kernel system call ip2BvN&
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x86 CPU,Windows,MASM32 FOD_m&+
.386 0v'FE35~s
.model flat,stdcall 0Nq6>^
%
option casemap:none ~6O<5@k
;Include 文件定义 8ZvozQE
include windows.inc q5u"v
include user32.inc i9quP"<9
includelib user32.lib 5_= HtM[v]
include kernel32.inc rT{+ h}vO
includelib kernel32.lib +6+!M_0wA
;数据段 qo62!q
.data Fun+L@:;
szCaption db 'A MessageBox!',0 @G:aW\Z
szText db 'Hello,world!',0 d6;"zW|Ec
;代码段 1"P^!N
.code B kWoK/f4
start: CJ#1j>
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ~x 0x.-^A
invoke ExitProcess,NULL Y> f 6
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> X!ad~bt
end start Gtpl5g QH
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AWK l~i&r?,]^
BEGIN { print "Hello, world!" } c2d=dGP>~f
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BASIC MH=;[ | N
传统版BASIC(例如GWBASIC): f=/IwMpn
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10 PRINT "Hello, world!" cop \o4ia
20 END t?<pyw $
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或在提示符输入: \c.MIDp"
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?"Hello, world!":END RNB ha&
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现代版BASIC(例如Quick BASIC): S eTn]
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Print "Hello, world!" !HPye@Ua
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以下的语句在Quick BASIC中同样有效: EvQMt0[?EW
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? "Hello,world!" Bp>Z?"hTe
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BCPL heN?lmC
GET "LIBHDR" aS,M=uqqK
wz{]CQ 7"
LET START () BE "{F e
$( O${B)C,
WRITES ("Hello, world!*N") suP/I?4'@
$) F T/STI
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Befunge o,yP9~8\
"!dlrow olleH">v XV|u!'Ey
, N=[# "4I
^_@ S%t*!
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+++++++++++++++.>.+++.------.--------.>+.>. NplWF\5y
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C @P@j9yR
#include <stdio.h> pDloew
`BOG e;pl
int main(void) #o/
{ N!#0O.6
printf("Hello, world!\n"); z:7
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return 0; 2YV*U_\L
} f+xhS,iDR
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C++ @3_[NI%
#include <iostream> &u}]3E'-k
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int main() nQ5N\RAZ
{ 5tG\5
std::cout << "Hello, world!" << std::endl; C1ZuDL)e
return 0; {)L*\r
} % r>v^1Vo
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EK=PY
C++/CLI cq#=Vb
int main() L55VS:'
{ =(cfo_B@K
System::Console::WriteLine("Hello, world!"); XK=-$2n
} &o]ic(74c?
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C# (C Sharp) kx.8VUoM
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class HelloWorldApp "eb+O
{ E$1P H)
public static void Main() }xG~a=,
{ T}r}uw`
System.Console.WriteLine("Hello, world!"); > %B7/l$
} +F@ZVMp
} iR39lOr
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COBOL agUdPl$e\
IDENTIFICATION DIVISION. ul!e!^qwx
PROGRAM-ID. HELLO-WORLD. (\o &Gl
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ENVIRONMENT DIVISION. <[Y@<
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DATA DIVISION. mF`%Z~}b
<<~swN
PROCEDURE DIVISION. U%u%_{-
DISPLAY "Hello, world!". h4geoC_W2
STOP RUN. \s^4f#
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m&{%6
Common Lisp }F=lG -x
(format t "Hello world!~%") MNWuw;:v
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DOS批处理 OJTEvb6nPg
@echo off t#sw{RO
echo "Hello, world!" }v$T1Cw
!dZpV~g0
|\] _u 3
Eiffel O$$$1VHYo
class HELLO_WORLD ]~J.YX9ST
[&H?--I
creation u8sK~1CPf
make kf>L
feature C
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make is &Rxy]kBA
local yMCd5%=M\
io:BASIC_IO <lFQ4<"m
do +~cW0z
!!io +:m'a5Dm
io.put_string("%N Hello, world!") B%^ $fJ|
end -- make 9<Kc9Z
end -- class HELLO_WORLD vddh 2G
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Erlang 9_5tA'Q
-module(hello). Z2soy-
-export([hello_world/0]). +'fdAc:5',
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hello_world() -> io:fwrite("Hello, World!\n"). `Q~`Eq?@
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