“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。 ]+pE1-p\
L8.A|
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》。 &0*l:uw
)<J #RgE
以下是用不同语言写成的Hello World程序的几个例子: *cFGDQ!
Ada P)y2'JKL
with Ada.Text_Io; use Ada.Text_Io; ql.[Uq
procedure Hello is u7J:ipyiq2
begin 8}[<3K%*g
Put_Line ("Hello, world!"); &VU^d3gv~
end Hello; ok ,O/|E}?
0*P-/)o x
gmTBp}3
汇编语言 ]c_lNHssmq
~,F]~|U7l
x86 CPU,DOS,TASM #bGYHN
MODEL SMALL #r>)A
IDEAL yAGQD[ih
STACK 100H =?Co<972Z
Q!-"5PX
DATASEG
1l}Am>}
HW DB 'Hello, world!$' DZESvIES
~<IQe-Q5
CODESEG N>L)2WKFT
MOV AX, @data )=glN<*?
MOV DS, AX ?:GrM!kq76
MOV DX, OFFSET HW zBI2cB8;P
MOV AH, 09H R^@`]dX$
INT 21H &> .QDO
MOV AX, 4C00H ,lCFe0>k!=
INT 21H +c]D2@ctG
END S~z$=IiB
H,;ZFg /v8
n~>b}DY
x86 CPU,GNU/Linux,NASM -H\j-k
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 9nO&d(r g
;Enter this into "hello.asm" then type: ^|U5@u_
;"nasm -f elf hello.asm" c-7Zk!LfD
;"ld hello.o -o hello" &2y9J2aA
;"./hello" OI/]Y7D[Oq
IO?a.L:6U
section .data ;data section declaration g~|x^d^;|
msg db 'Hello World!',0AH =<M>fJ)
len equ $-msg ;string length o}wRgG
[D?xd/G
section .text ;code section declaration %PR,TWe
global _start ;entry point (start of execution) e7Gb7c~
_start: mov edx,len ;string length D ][I#vh
mov ecx,msg ;string start fe6Op
mov ebx,1 ;file handle: stdout D@{m
mov eax,4 ;sys_write d`?EEO
int 80h ;kernel system call $WE_aNfja
H-WNu+
mov ebx,0 ;return value l) KN5V
mov eax,1 ;sys_exit SzG
%%CXH_
int 80h ;kernel system call (7~vOWs:[
`yhc,5M
][OkydE
x86 CPU,Windows,MASM32 +K=RM qM-8
.386 geM`O|Np
.model flat,stdcall ^^xzaF
option casemap:none &&}c R:U,
;Include 文件定义 )i-`AJK-'v
include windows.inc YSZ[~?+
include user32.inc )5<dmK@
includelib user32.lib Vz5<Gr
include kernel32.inc DAN"&&
includelib kernel32.lib u0uz~ s
;数据段 >NpW$P{'
.data @6U&7!
szCaption db 'A MessageBox!',0 u7p:6W
szText db 'Hello,world!',0 0eCjK.
;代码段 v!mP9c
j
.code eEmLl(Lb
start: -42 U
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK lvk*Db$
invoke ExitProcess,NULL ri9n.-xs
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Eh`W J~
end start M9yqJPS}B
#TP Y%
G0r(xP?
AWK eLyIQo W
BEGIN { print "Hello, world!" } wDh&S{N
jd+HIR
!wrAD"l*@
BASIC x||b:2
传统版BASIC(例如GWBASIC): lnxA/[`a
YWq{?'AaR
10 PRINT "Hello, world!" P}PMRAek
20 END 5kv]k?
"bjbJC&T
或在提示符输入: (ubK
i[)
A_6Dol=J@
?"Hello, world!":END B)-P#,}
R?*-ZI[>w
现代版BASIC(例如Quick BASIC): .9!&x0;
4vH.B)S-
Print "Hello, world!" 6>EoU-YX}l
:~,akX$
以下的语句在Quick BASIC中同样有效: ZQJh5.B
Lr>4~1:`
? "Hello,world!" {
lZ<'p
1T3YFt@&I
)T^aJ-Uf
BCPL 0ENqK2
GET "LIBHDR" Rk{2ZUeg
#|e5i9l*B
LET START () BE C4C!-12
$( pq5bK0NQ
WRITES ("Hello, world!*N") rHtX4;f+><
$) +d6Jrd*
sy9Yd PPE
Au?(_*/0
Befunge Yr:$)ap
"!dlrow olleH">v piiO5fK|
, #+3I$ k
^_@ ?Vr~~v"fg8
]"1\z>Hg
"w{,ndZ
Brainfuck `udZ =S"/L
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ~U4;YlQP
+++++++++++++++.>.+++.------.--------.>+.>. 0k|/]zfb
DZ;2aH
(WS<6j[q
C SYK?5_804
#include <stdio.h> -(.\> F
-_Iuvw
int main(void) '8Lc}-M4
{ p WKpc
printf("Hello, world!\n"); &[}5yos
r
return 0; %u$dN9cw
} nHF
i0&]Ig|;
[6Nzz]yy
C++ i>rsq[l
#include <iostream> "[]J[!}x
L2y{\<JC"
int main() |.U-
yyz
{ ["?WVXCF8|
std::cout << "Hello, world!" << std::endl; < 'qtqUL\
return 0; <Xj
,>2m;
} Aq P\g k
+&TcTu#.`
/K#J63 ,
C++/CLI :!g zx n
int main() C}mWX7<Z.
{ e%DF9}M
System::Console::WriteLine("Hello, world!"); _:;j)J0
} d`Em)3v
}=."X8zOI8
jLf8 7
C# (C Sharp) F30jr6F\
class HelloWorldApp !HHbd|B_
{ Hz<)a(r!J
public static void Main() _N`pwxpsb
{ =E%<"FB
System.Console.WriteLine("Hello, world!"); =R\-mov$
} ku=XPmZ.\
} qxW2q8QHo
/-)|dP
-`ykVHgg
COBOL *C?x\.\C
IDENTIFICATION DIVISION. V.274e
PROGRAM-ID. HELLO-WORLD. Pi|oO-M
oWc
+i U(
ENVIRONMENT DIVISION. Ti9cN)lq&
OL"So
u4
DATA DIVISION. _.Bite^
) N"gW*
PROCEDURE DIVISION. >'zp
DISPLAY "Hello, world!". %4E7 Tu,1
STOP RUN. V/-~L]G
(gv
~Vq
D+
**o
Common Lisp S$I:rbc
(format t "Hello world!~%") ETVT.R8
!bCLi>8
&9'JHF!l
DOS批处理 S\UM0G}v
@echo off +nslS:(
echo "Hello, world!" +#<"o#gZ
RsDI7v
#8d$%F))
Eiffel Qmh*Gh?v
class HELLO_WORLD wbId}!
Cx/duodp
creation ^5~[G%G4
make cBA2;5E
feature $T0|zPK5
make is $rC`)"t
local "]`QQT-{0
io:BASIC_IO DDhc ^(
do j{'@g[HW
!!io gB@Wv91
io.put_string("%N Hello, world!") fJC,ubP[5
end -- make MY["
zv
end -- class HELLO_WORLD Fk,3th
w,.Hdd6
T;< >"" T
Erlang :+,qvu!M7
-module(hello). %tzz3Y
-export([hello_world/0]). K` 2a{`
?Xo9,4V1
hello_world() -> io:fwrite("Hello, World!\n"). vu.f B4
Ic/<jFZXM
!<2*B^
Forth n%<.,(.(S
." Hello, world!" CR zj;y`ENj
!J'xk
t>v']a +k
Fortran EH$wWl^
WRITE(*,10) i,,>@R
10 FORMAT('Hello, World!') qwaw\vOA
STOP 4p~:(U[q
END (<.1o_Q-LU
2s6Hr;^w.1
{_/6,22j(V
HTML Ck.GN<#-^P
<HTML> o#wF/ I
<HEAD> I$wP`gQh
<TITLE> Hello World! </TITLE> }Gz"og*8
</HEAD> 5J&n<M0G1
<BODY> pp[? k}@
<p>Hello World!</p> m|"MJ P
</BODY> oci-[CI,
</HTML> 9HEc=,D|
O!]wJ
n5]<|>Uvx
HQ9+ ^?xXP=/
H ;|/7o@$n
}RUC#aW1
6]gs{zG
INTERCAL D0k7)\puQ
PLEASE DO ,1 <- #13 D1O7S]j
DO ,1 SUB #1 <- #238 +-~;?wA
DO ,1 SUB #2 <- #112 28BiuxVW
DO ,1 SUB #3 <- #112 ($W9
?
DO ,1 SUB #4 <- #0 ccm <rZ7
DO ,1 SUB #5 <- #64 "ej>1{3Y:=
DO ,1 SUB #6 <- #238 ` ?6m0|\@
DO ,1 SUB #7 <- #26 u X0wg
DO ,1 SUB #8 <- #248 KQ9:lJKr
DO ,1 SUB #9 <- #168 t8)Fkx#8}
DO ,1 SUB #10 <- #24 {fN_itn
DO ,1 SUB #11 <- #16 TPEZ"%=Hg
DO ,1 SUB #12 <- #158 iZyk2kc
DO ,1 SUB #13 <- #52 JrL/LGY
PLEASE READ OUT ,1 "iZ-AG!C
PLEASE GIVE UP IW BVfN->}
Z21XlbK
a5)[?ol
Java vP~F+z
@g
public class Hello "
^eq5?L
{ Q#g
s)2
public static void main(String[] args) ci^-0l_O
{ 4GHIRH
C%[
System.out.println("Hello, world!"); 3P\I;xM
} )sS<%Xf
} @e0Q+ t
*,n7&
P|(J]/
JSP DU7Ki6
<% )v-* Wr eS
out.print("Hello, world!"); \iE'E
%> Om1z
i~F Ct4
q3P3euK3
MIXAL 8m*\"_S{
TERM EQU 19 the MIX console device number
W>Rv
ORIG 1000 start address m9B3]H
START OUT MSG(TERM) output data at address MSG 2\5@_U^)h
HLT halt execution mmKrmM*1
MSG ALF "MIXAL" I]
"$h]T
ALF " HELL" RY~)MS _C
ALF "O WOR" .N+xpxdG,
ALF "LD " IkZ_N #m
END START end of the program #b" IX`5
YJ6vyG>%C
'
R@<4Ib|
Nuva */+s^{W7
<..直接输出..> Y3zO7*-@
Hello, world! ;_SS3q
%!$-N!e
<..或者..> +|8Lt[^ux
E8dp
<. 4*,q1yK
// 不带换行 Sd\@Q%
}o\
? "Hello, world!" h1gb&?w5P
&4%J35~
// 或者 [qI* ]
'_&(Iwu
// 带换行 SmLYxH3F
?? 'Hello, world!' y-X'eCUz
.> uHIWbF<0oo
s+w<!`-
Y'HF^jv]R
OCaml {pg@JA
let main () = 0* "j:V
print_endline "Hello world!";; =dw1Q
#&:nkzd
7w$R-Y/E
Pascal lKD@2
program Hello; #<e7 Y0
begin #~f+F0#%?
writeln('Hello, world!'); 2Ee1mbZVw8
end. @/u`7FO$&
&e)p6Egl
9}mp,egV
Perl ,Ex\\p-
#!/usr/local/bin/perl 2~U+PyeNz
print "Hello, world!\n"; e ^qnUjMy
mpivg
&zd7t6
PHP qR<DQTO<
<?php /t^lI%&
print("Hello, world!"); 4Qo1f5>N
?> B<&_lG0s