“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。 X7&U3v
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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`Xg%*]}
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以下是用不同语言写成的Hello World程序的几个例子: #NMJZ
Ada m+7`\|`jQ
with Ada.Text_Io; use Ada.Text_Io; q\_DJ)qpn
procedure Hello is TU-c9"7M~
begin MA"#rOcP
Put_Line ("Hello, world!"); nrbazyKm
end Hello; 2:~cJk{
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汇编语言 $owb3g(%4
%09*l%,;
x86 CPU,DOS,TASM `{L{wJ:&a
MODEL SMALL ,5:![
IDEAL ' 3VqkQ4
STACK 100H 8 >dq=0:
q xSs
~Qc
DATASEG ##2`5i-x
HW DB 'Hello, world!$' "B?R|
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SKn
CODESEG S|) J{~QH
MOV AX, @data @Q3, bj
MOV DS, AX 1W0.Ufl)
MOV DX, OFFSET HW sSy$(%
MOV AH, 09H \N yr=<c
INT 21H NkoofhZ
MOV AX, 4C00H W/a,.M
INT 21H F`3^wHw^
END +i4P,Lp
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x86 CPU,GNU/Linux,NASM bkkSIl+Q
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). *bU% @O
;Enter this into "hello.asm" then type: ik1XGFy?
;"nasm -f elf hello.asm" ]p\u$VY9
;"ld hello.o -o hello" 15JsmA*Q
;"./hello" ZGzc"r(r:#
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section .data ;data section declaration n{z8Ao%
msg db 'Hello World!',0AH 1oB$u!6P
len equ $-msg ;string length IY03"
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section .text ;code section declaration j7,13,t1-
global _start ;entry point (start of execution) '#KA+?@
_start: mov edx,len ;string length 7\f{'KL
mov ecx,msg ;string start Jxf}b}^T
mov ebx,1 ;file handle: stdout %B0w~[!4}
mov eax,4 ;sys_write |FjBKj
int 80h ;kernel system call s9G)Bd 8
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mov ebx,0 ;return value &b!vWX1N
mov eax,1 ;sys_exit *^ey]),f54
int 80h ;kernel system call gU u&Vy\
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dA|Lufy#
x86 CPU,Windows,MASM32 {clCn
.386 Q|Nzbmwh
.model flat,stdcall 7
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option casemap:none 8V,"Id][
;Include 文件定义 p8$\uo 9YQ
include windows.inc :|zp8|
include user32.inc |$Qp0vOA}
includelib user32.lib ,RR;VKj
include kernel32.inc ,cPkx~w0
includelib kernel32.lib [6G=yp
;数据段 j6RJC
.data Lblet
szCaption db 'A MessageBox!',0 J-b~4
szText db 'Hello,world!',0 h)7v1,;w'
;代码段 $1b]xQ
.code }+*w.X}L
start: 3_C98ClE
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK /i> ?i@O-
invoke ExitProcess,NULL 3Hy%SN(
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> L,E-z_<p
end start 5d> nIKW
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=!(S<];
AWK W;q#ZD(;
BEGIN { print "Hello, world!" } o@Scz!"g
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BASIC o*?[_{xW
传统版BASIC(例如GWBASIC): }Q,(u
rf)PAdj|~
10 PRINT "Hello, world!" -hQ96S8
20 END &qNP?>C!=
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或在提示符输入: _'H2>V_
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?"Hello, world!":END >F,$;y52
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现代版BASIC(例如Quick BASIC): LQ~LB'L
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Print "Hello, world!" Z@<q/2).|
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以下的语句在Quick BASIC中同样有效: [t {vYo
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? "Hello,world!" O\LjtMF
mipi]*ZfXE
FAH[5VDr%
BCPL "ugX
/r$_
GET "LIBHDR" 5JO[+>
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LET START () BE M|1eqR%x-?
$( N5[_a/
WRITES ("Hello, world!*N") &*X3ch
$) (PRaiE
s4!|v`+$M
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Befunge cZPbD;e:
"!dlrow olleH">v 1-4
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!
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Brainfuck sZ0g99eX
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< _Jf J%YXy
+++++++++++++++.>.+++.------.--------.>+.>. l*~"5f03
~+sne7
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j:3A;r\
C ]$* $0
#include <stdio.h> HY*l 4QK
Q3 K;kS
int main(void) k/$Ja;
{ z44
printf("Hello, world!\n"); oA(. vr
return 0; ?q+8 /2
} :7HVBH
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C++ ]hCWe0F
#include <iostream>
s98: *o3
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int main() QT7w::ht
{ sV9{4T~#|
std::cout << "Hello, world!" << std::endl; g
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return 0; jEC'l]l
} TKj/6Jz|
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},?-$eyX
C++/CLI 7H8GkuO
int main() O^QR;<t'
{ P^'>dOI0w
System::Console::WriteLine("Hello, world!"); \#h})`
} `DU'wB
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C# (C Sharp) SL?%/$2g=O
class HelloWorldApp }'@tA")-)
{ VWnu#_(
public static void Main() 8eg2o$k_,#
{ d +*T@k]>M
System.Console.WriteLine("Hello, world!"); T>AI0R3
} m)tI
} 6/p]jN
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COBOL _*OaiEL+:
IDENTIFICATION DIVISION. -jcrXskb&N
PROGRAM-ID. HELLO-WORLD. "6|'&6&
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ENVIRONMENT DIVISION. -y7l?N5F>
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DATA DIVISION. DYy@t^sC
LaAgoarN
PROCEDURE DIVISION. ,d/CU
DISPLAY "Hello, world!". 8EW`*+%=
STOP RUN. ];YglHH
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*YiD B?Si
Common Lisp m \R@.jkZ
(format t "Hello world!~%") (o6A?37i
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-7C=- \]
DOS批处理 ,=XS%g}l4
@echo off (
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echo "Hello, world!" a8lo!e9q
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N@%xLJF=N>
Eiffel ^qSf
class HELLO_WORLD qB`0^V
qqO10~Xc
creation 8&`T<ECq>
make x r+E
feature A7I8Z6&
make is 5jj57j"
local %o SfL;W7
io:BASIC_IO MO(5-R`
do MRxo|A{
!!io D%5 {A=
io.put_string("%N Hello, world!") YA/H;707l
end -- make W+-f `
end -- class HELLO_WORLD Nt,]00S\w
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Erlang *I;Mp
-module(hello). 37za^n?SG
-export([hello_world/0]). \sXmMc
u+, jAkr
hello_world() -> io:fwrite("Hello, World!\n"). f R{WS:Pv
":ws~Zep
* Kp ^al
Forth <T=o]M$
." Hello, world!" CR Di5Op(S((
B=nx8s
% 'L=
Fortran #!F8n` C-
WRITE(*,10) 'KN!m|
z
10 FORMAT('Hello, World!') Xf'
STOP z;@S_0M,Z
END @?($j)9}
3 `C3+
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HTML J3!k*"P
<HTML> f|HgLFx
<HEAD> vr]dRStr
<TITLE> Hello World! </TITLE> :L+zUlsf
</HEAD> 6b1 Uj<
<BODY> mhHm#
<p>Hello World!</p> ::Ve ,-0
</BODY> dsft=t8s
</HTML>
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INTERCAL ^LAS9K1.
PLEASE DO ,1 <- #13 BRQ5
DO ,1 SUB #1 <- #238 )F9V=PJE
DO ,1 SUB #2 <- #112 uma9yIk
DO ,1 SUB #3 <- #112 t3h \.(mq
DO ,1 SUB #4 <- #0 !un"XI0`t<
DO ,1 SUB #5 <- #64 hJtghG6v
DO ,1 SUB #6 <- #238 epm8N /
DO ,1 SUB #7 <- #26 E<.{
v\
DO ,1 SUB #8 <- #248 J jL0/&
DO ,1 SUB #9 <- #168
61 HqBa
DO ,1 SUB #10 <- #24 9#A{C!75(y
DO ,1 SUB #11 <- #16 tZ6v@W
DO ,1 SUB #12 <- #158 (l,YI"TzT
DO ,1 SUB #13 <- #52 ^gVbVz[17
PLEASE READ OUT ,1 Ub-k<]yZ
PLEASE GIVE UP 9R<J$e
#on fac- 3
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Java Y{\2wU!Isn
public class Hello s?gXp{O?X
{ +r34\mAO
public static void main(String[] args) aG&kl O>m
{ Z_TbM^N
System.out.println("Hello, world!"); -Z#]_C{Y-)
} Wug ?CFX+T
} E"vi+'(v
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m_Y}>
JSP "\P~Re"EH
<% Ffqn|}gb
out.print("Hello, world!"); :Y&W)V-
%> ? F:C!_
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MIXAL I5 7<