“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。 _WWC8?6U
vOlfyH>
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》。 2K>1,[ C'Z
++,I`x+p
以下是用不同语言写成的Hello World程序的几个例子: 9)tb=
Ada NHyUHFY
with Ada.Text_Io; use Ada.Text_Io; X:Z3R0
procedure Hello is :} =lE"2
begin QO;Dyef7b
Put_Line ("Hello, world!"); x] wi&
end Hello; apm%\dN
GZaB z#U
bQ3<>e\%B
汇编语言 Ne<S_u2nT
y$7Ys:R~
x86 CPU,DOS,TASM >A{Dpsi\
MODEL SMALL +g?uvXC&
IDEAL 'M6+(`x
STACK 100H kB@gy}
r*b+kSh
DATASEG |Yw k
HW DB 'Hello, world!$' ddN(L`nd
F,S)P`?
CODESEG Y(6evo&IR
MOV AX, @data $rW(*#C
MOV DS, AX 4$VDJ
MOV DX, OFFSET HW 5?H8?~&dz
MOV AH, 09H >+7{PF+sB
INT 21H e]1'D
MOV AX, 4C00H 5;KJ0N*-
INT 21H !%65YTxY-
END '-A;B.GV%
xDw~n (*
wyX3qH
x86 CPU,GNU/Linux,NASM JqO1 a?H
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). tUH?N/qn
;Enter this into "hello.asm" then type: c?CfM>
;"nasm -f elf hello.asm" '8)kFR^9
;"ld hello.o -o hello" \}h
;"./hello" {K+f&75
fWJpy#/^*K
section .data ;data section declaration b|.Cqsb
msg db 'Hello World!',0AH
8?LT*>!
len equ $-msg ;string length O#;sY`fy_M
q
n-f&R
section .text ;code section declaration 3 orZBT
global _start ;entry point (start of execution) h%F.h![*
_start: mov edx,len ;string length (8m_ GfT
mov ecx,msg ;string start O'(Us!aq
mov ebx,1 ;file handle: stdout RgV3, z
mov eax,4 ;sys_write (y;
6H
int 80h ;kernel system call ,&@GxiU
_ab8z]H
mov ebx,0 ;return value \k=dqWBr7
mov eax,1 ;sys_exit j"6|$Ze8
int 80h ;kernel system call 55s5(]`d
:AlvWf$d
m2^vH+wD
x86 CPU,Windows,MASM32 5QK%BiDlr
.386 o} QP+
.model flat,stdcall ',g%L_8Sq
option casemap:none 2F*>&n&Db7
;Include 文件定义 XgX~K:<jt
include windows.inc 36{OE!,i
include user32.inc 3m75mny
includelib user32.lib c6 &k?Puy
include kernel32.inc ^k7I+A
includelib kernel32.lib c=+%][21
;数据段 v\dQjQu8m
.data #&)H&H}
szCaption db 'A MessageBox!',0 nuWQ3w
p[e
szText db 'Hello,world!',0 >?K=l]!(*
;代码段 W8bp3JX"
.code =&08s(A
start: 0IqGy}+VU
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK (${:5W
invoke ExitProcess,NULL (N&i4O-I
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> &,<,!j)Jr
end start ppn 8
'8zd]U
67&IaDts
AWK zZPWE"u}
BEGIN { print "Hello, world!" } 8y6dT
_+9i
EpG9t9S9
BASIC %dnpO|L
传统版BASIC(例如GWBASIC): ?XdvZf $
@~s5 {4
10 PRINT "Hello, world!" AJ>E\DK0]
20 END {+#{Cha
a]fFR~OY
或在提示符输入: @yb'h`f]
k0=!%f_G!
?"Hello, world!":END kOo Vqu
HdtGyh6X0
现代版BASIC(例如Quick BASIC): !m:WoQ/
iCpm^ XT
Print "Hello, world!" >;Oa|G
cO{NiRIb
以下的语句在Quick BASIC中同样有效: kwUUvF7w
e eN`T&cI
? "Hello,world!" j?*n@'
M887 Q'HSi
|sr\SCx
BCPL |DW^bv
GET "LIBHDR" X%s5D&gr
):hz/vZ
LET START () BE C ibfuR
$( _+P*XY5
WRITES ("Hello, world!*N") %8I^&~E1
$) b+:mV7eX
[sG`D-\P[
P=EZ6<c3&
Befunge TJRp/BP
"!dlrow olleH">v EsWB |V>
, {@L{l1|0
^_@ >F^$
' b]
3(J>aQZuI
eD7\ ,}O
Brainfuck ESoqmCJjb:
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< )MI w/
+++++++++++++++.>.+++.------.--------.>+.>. 'X+aYF}Ye
z)KoK`\mE"
;p*L(8<YI
C SE(<(w
#include <stdio.h> >.P*lT
VB |k
int main(void) 2u_=i$xW
{ W:n\,P
printf("Hello, world!\n");
i / o
return 0; @>U9CL"
} o/,%rA4
GB `n
BeRs;^r+
C++ ]b}3f<
#include <iostream>
Rq| 5%;1
;(,GS@sP
int main() o"RE4s\G~r
{ oIOeX1$V
std::cout << "Hello, world!" << std::endl; 6flO;d/v
return 0; O<!^^7/h0
} C`Vuw|Xl
1*9 Yy~w
as3uz
C++/CLI moVf(7
int main() 5C*Zb3VG4
{ {DvWa|
System::Console::WriteLine("Hello, world!"); L
~Vw`C
} (.oDxs()I
8z=o.\@
gHUW1E
C# (C Sharp) ^+~$eg&js
class HelloWorldApp n$j B"1
{
ArX*3
public static void Main() ZPM7R3%V)z
{ A+Je?3/.
System.Console.WriteLine("Hello, world!"); X+emJ&Z$@
} K'e!BZm6Q
} jj `0w@
,t1s#*j\!q
b2F1^]p
COBOL PK?}hz
IDENTIFICATION DIVISION. ND9;%<80
PROGRAM-ID. HELLO-WORLD. k]& I(VQ"
)CL/%I,^
ENVIRONMENT DIVISION. Dh{P23}
ioTqT:.
DATA DIVISION. V /OW=WCzN
W#b++}S
PROCEDURE DIVISION. E.VEW;=
DISPLAY "Hello, world!". &#q%#M:
STOP RUN. /$vX1T
)Knsy
g5Hsz,x
Common Lisp OZObx
(format t "Hello world!~%") d9
8pv%
JLyFkV/
8r\xQr'8h
DOS批处理 Eh_[8:dK
@echo off #@5 jOi
echo "Hello, world!" n |,}
E\}Q9,Z$
>273V+dy
Eiffel hW cM.
class HELLO_WORLD =(k0^#++G
>W8PLo+i
creation hi]\M)l&x
make KRcg
feature Y50$2%kM
make is V|0UwS\n
local Ox/va]e7"
io:BASIC_IO }% |GV
do R91u6r#
!!io uoBPi[nK
io.put_string("%N Hello, world!") i%B$p0U<
end -- make p7O4CP>9[
end -- class HELLO_WORLD :TWHmxch
@1[LD[<
b}q,cm
Erlang }KkH7XksF
-module(hello). [
06B)|s
-export([hello_world/0]).
UuA=qWC
sAc)X!}
hello_world() -> io:fwrite("Hello, World!\n"). *KV]MdS
|y=D^NTG
r>q`# ~
Forth 4 ]8PF
." Hello, world!" CR 7~`6~qg.
AB#hhi#
7,LT4wYH
Fortran )Zm E"
WRITE(*,10) q+G1#5
10 FORMAT('Hello, World!') +~/zCJ;F
STOP &c@I4RV|q
END aH$*Ue@Q
g-(xuR^*
!!K=v7M
HTML "ChBcxvxb:
<HTML> ?
8!N{NV
<HEAD> x[oYN9O
<TITLE> Hello World! </TITLE> X:g5>is|
</HEAD> h/w- &7t
<BODY>
nocH~bAf2
<p>Hello World!</p> KJkcmF}Q
</BODY> FRF}V@~
</HTML> rC*n Z*
4-n.4j|
3 \WdA$Wx
HQ9+ %yrP: fg/
H NAocmbfNz
|)_<