“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。 <z*SO
a
38%xB<Y
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》。 ^ )Lh5
D %`64R
以下是用不同语言写成的Hello World程序的几个例子: yuvt<kz
Ada >a;^=5E
with Ada.Text_Io; use Ada.Text_Io; s9<fPv0w
procedure Hello is >69+e+|I
begin Ok+zUA[Wu
Put_Line ("Hello, world!"); 6ZBg/_m
end Hello; bc"E=z
IPU'M*|Q
_,i]ra{%
汇编语言 oVsj
Q
bUC-}
x86 CPU,DOS,TASM fn zj@_{|
MODEL SMALL iAX\F`
IDEAL j w)Lofn
STACK 100H ~a[]4\m;
YWSo:)LY
DATASEG kyQ%qBv ^
HW DB 'Hello, world!$' x=yU
}lsV
3,bA&c3
CODESEG xQ62V11R6
MOV AX, @data 8{HeHU
MOV DS, AX /LM*nN$%
MOV DX, OFFSET HW W>Y8 u8
MOV AH, 09H .$DB\jJXjV
INT 21H 6u3DxFiTm
MOV AX, 4C00H `)F lb|da
INT 21H eB78z@
END )EYsqj
%Yg;s'F>#q
0Ng6Xg(QHc
x86 CPU,GNU/Linux,NASM Bo?uwi
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). .*>LD
;Enter this into "hello.asm" then type: OE-$P
;"nasm -f elf hello.asm" X6~y+R
;"ld hello.o -o hello" BJk:h-m [
;"./hello" Jp.Sow
/>XfK,c-
section .data ;data section declaration "_ b
Sy
msg db 'Hello World!',0AH PNXZ 3:W
len equ $-msg ;string length J.:"yK""
>\K<q>*
section .text ;code section declaration /d5_-AB(v
global _start ;entry point (start of execution) a\\B88iRRZ
_start: mov edx,len ;string length 4@|K^nT`
mov ecx,msg ;string start ^ 3LM%B
mov ebx,1 ;file handle: stdout $=$I^hV
mov eax,4 ;sys_write Z9ciS";L
int 80h ;kernel system call l/yLSGjM
EA2BN}
mov ebx,0 ;return value |H5){ 2V>K
mov eax,1 ;sys_exit S(5.y%"<
int 80h ;kernel system call iYA06~d
FpE83}@".w
$nQ; ++
x86 CPU,Windows,MASM32 StWDNAf)
.386 %4 cUa| =?
.model flat,stdcall 3O<<XXar
option casemap:none {o7ibw=E)
;Include 文件定义 h[3N/yP
include windows.inc =/J4(#Xb
include user32.inc z.eqOPW
includelib user32.lib a=k+:=%y
include kernel32.inc 3=)/-l
includelib kernel32.lib zzuDI_,/
;数据段 B4R!V!Z*
.data <\?ySto
szCaption db 'A MessageBox!',0 Wt"@?#L
szText db 'Hello,world!',0 n.67f
;代码段 ?)1h.K1}M
.code o(>!T=f
start: F&;g<
SD
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK dW<.
invoke ExitProcess,NULL Q<zL;AJ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> $} l0Nh'Eu
end start !
2"zz/N{
b,7:=-D
N{iBVl
AWK u.0Z)j}N
BEGIN { print "Hello, world!" } {g l-tRC3
][ :6En}
J$&!Y[0
BASIC b#P,
传统版BASIC(例如GWBASIC): `?rPs8+R
E@"+w,x)
10 PRINT "Hello, world!" Xca Y'k#
20 END u~Q0V J~
J'Yj_
或在提示符输入: tQ'E"u1
Iqe4O~)
?"Hello, world!":END %B3E9<9>U
b0x9}
现代版BASIC(例如Quick BASIC): Xgd!i}6Q
Tx0/3^\>8A
Print "Hello, world!" 17H_>a\`
!li Q;R&
以下的语句在Quick BASIC中同样有效: :^3MN
6YrkS;_HS
? "Hello,world!" .Q?cNSWU
2#@S6zc
)& %X
AW{
BCPL =]\,I'
GET "LIBHDR" DkA cT[
_+wou(1y
LET START () BE CCp{ZH s
$( J^pL_
WRITES ("Hello, world!*N") >AV-i$4eQ@
$)
v%/_*69a
%H~q3|z
Mmbb}(<
Befunge SYB
}
e
"!dlrow olleH">v %#02Z%?%
, bU=!~W5
^_@ WUGPi'x
0fXdE ;M3
mR[J Xh9s
Brainfuck ?nB).fc
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< f_9%kEXICt
+++++++++++++++.>.+++.------.--------.>+.>. m=PSCIb
odny{ePAf
`9s5 *;Z
C rgB`<[:b
#include <stdio.h> 9HRYk13ae
J@H9nw+Q
int main(void) h;^h[q1'
{ 7w|W\J^7r
printf("Hello, world!\n"); /^DDU!=(<
return 0; {]]nQ
} M=x/PrY"R
f 7y1V(t
^;c!)0Q<Z
C++ k:Uyez
#include <iostream> p44d&9
0DIaXdOdW+
int main() K;_p>bI5
{ xI<Dc*G
std::cout << "Hello, world!" << std::endl; \5k[ "8~
return 0; hBLJKSv
} nC qUg_{D
^;<s"TJ(m)
PsEm(.z
C++/CLI Exc`>Y q
int main() cA`R~o"
{ WA8Qt\Q
System::Console::WriteLine("Hello, world!"); (".`#909
} /+"BU-aQk
HpSgGhL'J&
G!8O*4+A
C# (C Sharp)
IpoZ6DB$
class HelloWorldApp WsL*P.J
{ SBAq,F'
public static void Main() :'f#0 ox
{ K:V_,[gO
System.Console.WriteLine("Hello, world!"); =KmjCz:
} 68*h#&
} bb$1RLyRL
+su>0'a
giyKEnP
COBOL KU"?ZI
IDENTIFICATION DIVISION. vZTX3c:,1
PROGRAM-ID. HELLO-WORLD. s)_7*DY
f/&Dy'OV7
ENVIRONMENT DIVISION. Aw;~b&.U{_
gZM\RJZ_
DATA DIVISION. <o3e0JCq
FaPX[{_E
PROCEDURE DIVISION. Jq l#z/z
DISPLAY "Hello, world!". 0 4x[@f`
STOP RUN.
*"P
:ySA
Cl6y:21]K
zn_ InxR
Common Lisp %njX'7^u
(format t "Hello world!~%") uPsn~>(4
WT;=K0W6&
Qa5<go{
DOS批处理 E O52 E|
@echo off xA`Q4"[I
echo "Hello, world!" (NFq/w%
q<@f3[A
\"V7O'S)&
Eiffel G+=euK2]
class HELLO_WORLD go|/I&
&[3 xpi{v
creation Fs|fo-+H}k
make I+!w9o2nZ
feature '8 1M%KO
make is ']ya_ v~e
local Zi|MWaA.f
io:BASIC_IO Zuo7MR
do {<\nl#}5S
!!io R^1sbmwk
io.put_string("%N Hello, world!") [0lCb"
end -- make Z WL/ AC
end -- class HELLO_WORLD -=&r}/&
up=4B
^e"BY(
Erlang 4+:Q"
-module(hello). );kO27dg
-export([hello_world/0]). aG%KiJ7KEN
qy`@\)S/5
hello_world() -> io:fwrite("Hello, World!\n"). Ih ;6(5z
`ihlKFX
`pn]jpW9
Forth ua/A &XQx
." Hello, world!" CR 7ib~04
_SY<(2s]B
mv/'H^"[_
Fortran `4'v)!?
WRITE(*,10) NN\% X3ri"
10 FORMAT('Hello, World!') lf4-Ci*X
STOP 05gU~6AF
END D(Pd?iQIO
MG*#-<OV.
^+F@KXnL
HTML <K=:_
<HTML> O"<D0xzF?
<HEAD> 0vbn!<:
<TITLE> Hello World! </TITLE> SZpBbX$
</HEAD> 7m~+HM\
<BODY> Uq<c+4)5
<p>Hello World!</p> }y(1mzb
</BODY> ~k/'_1)c
</HTML> _VMW-trG
W2O
=dG`
LcoJltY{5
HQ9+ Om0Z\GP=
H |g;hXr#~
?SK1*; i
!>TVDN>
INTERCAL 4`o_r%
PLEASE DO ,1 <- #13 3!_y@sWx
DO ,1 SUB #1 <- #238 elG<\[
DO ,1 SUB #2 <- #112 U ; JZN
DO ,1 SUB #3 <- #112
\U(qv(T
DO ,1 SUB #4 <- #0 F-R4S^eV
DO ,1 SUB #5 <- #64 1#qyD3K
DO ,1 SUB #6 <- #238 D.kLx@Z
DO ,1 SUB #7 <- #26 p[4KN(PyK
DO ,1 SUB #8 <- #248 \EuMzb"G9p
DO ,1 SUB #9 <- #168 J(ZYoJ
DO ,1 SUB #10 <- #24 ]OL
O~2j
DO ,1 SUB #11 <- #16 7<*sP%6bD
DO ,1 SUB #12 <- #158 0UB)FK,9
DO ,1 SUB #13 <- #52 %"r3{Hs
PLEASE READ OUT ,1 (TM1(<j
PLEASE GIVE UP
)o`|t
&|'1.^f@;E
#K.OJJaG
Java 12U1DEd>-
public class Hello )s5Q4m!
{ mY*JNx
public static void main(String[] args) _<yGen-
{ tV%:sk^d
System.out.println("Hello, world!"); wb~#=6Y
} l ~CYxO
} yw `w6Z3K
X`/8fag
[G>8N5@*
JSP {'C PLJ{R
<% ~OD}`
out.print("Hello, world!"); 5tdFd"oo
%> 3jZPv;9OC
Cp`)*P2
&}_ $@
MIXAL lQj3#!1}
TERM EQU 19 the MIX console device number R*VRxQ,h6+
ORIG 1000 start address J,Du:|3o
START OUT MSG(TERM) output data at address MSG 62TWqQ!9d
HLT halt execution kG@~;*;l
MSG ALF "MIXAL" 9dn~nnd'n
ALF " HELL" Jz(wXp
ALF "O WOR" btoye \rl
ALF "LD " JnQ5r>!>3
END START end of the program _LU]5$\b
~,3+]ts='\
o *)>aw
Nuva L}5nq@Uu)
<..直接输出..> .xo#rt9_"=
Hello, world! LfOXgn\
!LB#K?I
<..或者..> ;)].Dj9
G`8i{3:
<. m%hI@'
// 不带换行 d#xi_L!
? "Hello, world!" _Cn[|E
zO)A_s.6K
// 或者 0`VA}c
Mhp6,JL
// 带换行 3]"RaI4Q0
?? 'Hello, world!' V<:scLm#OF
.> wXI6KN-
$L%gQkz_
'0|0rwx
OCaml xo3bY6<n
let main () = V_+XZ+7Lx}
print_endline "Hello world!";; }GI8p* ]o=
-7{ qTe{
9>?3FMKdY
Pascal )RV.N}NU
program Hello; 7.U
CX"
begin MG6taOO!
writeln('Hello, world!'); UP]X,H~stU
end. 6+`+$s0
_=l8e-6r
whFaL}2C
Perl 12r]"?@|s
#!/usr/local/bin/perl |:)UNb?R"O
print "Hello, world!\n"; C]H'z
o+Cd\D69S
"g}m xPe
PHP x[L/d"Wf
<?php >F7v'-*{
print("Hello, world!"); vU|=" #
?> |hGi8
4:m/w!q$
d0ZbusHHb
Pike QE8;Jk-
#!/usr/local/bin/pike )2vkaR
int main() p+6L qk<
{ k6.<