“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。 fKjUEMRK
w8>
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》。 t&L+]I'P3
~x 0x.-^A
以下是用不同语言写成的Hello World程序的几个例子: 6[l{@*r"
Ada ELqpIXq#
with Ada.Text_Io; use Ada.Text_Io; 3CArUP
procedure Hello is @"gWvs
begin $l<(*,,l
Put_Line ("Hello, world!"); @?\[M9yK
end Hello; =}7[ypQM`]
@h";gN
Zm~oV?6
汇编语言 ?5MOp
mq*Efb)!
x86 CPU,DOS,TASM +-+%6O<C
MODEL SMALL si.w1
IDEAL yttIA/
STACK 100H tf_<w?~
J'no{3Ktz
DATASEG d-sK{ZC"y
HW DB 'Hello, world!$' T`gR&n<D
XlHt(d0h
CODESEG A6#5 z
MOV AX, @data m C&*K
MOV DS, AX \C.s%m
MOV DX, OFFSET HW w5tcO%+k1
MOV AH, 09H qKL
mL2O
INT 21H N56/\1R
MOV AX, 4C00H ;R8pVj!1f
INT 21H "de3Sbj@?
END ofIw7D*h
RNB ha&
jizp\%W+
x86 CPU,GNU/Linux,NASM .PJCBTe
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). LIZsDTU
;Enter this into "hello.asm" then type: XAF*jevr
;"nasm -f elf hello.asm" eQQ*ZNG
;"ld hello.o -o hello" ,/bv3pE
;"./hello" ,U^V]jC
m"y_@Jk
section .data ;data section declaration dZ"w2ho
msg db 'Hello World!',0AH `;vJ\$-<
len equ $-msg ;string length oe*Y(T\G
D?:AHj%gW
section .text ;code section declaration 4itadQS
global _start ;entry point (start of execution) :$J4T;/{
_start: mov edx,len ;string length a8wQ,
mov ecx,msg ;string start @0{vA\
mov ebx,1 ;file handle: stdout ]= nM|e
mov eax,4 ;sys_write M!j: 2dT"
int 80h ;kernel system call "g=g' W#
ub,GF?9
mov ebx,0 ;return value ZIo%(IT!c
mov eax,1 ;sys_exit r{pbUk
int 80h ;kernel system call +J<igb!S
yRF
%SWO
;:5Ahfo \
x86 CPU,Windows,MASM32 GjD^\d/
.386 $63_*9
.model flat,stdcall ljw(cUM
option casemap:none 8pZGu8
;Include 文件定义 ft"t
include windows.inc ]W9 {<+&
include user32.inc ,6iXl ch
includelib user32.lib .Fe_Z)i>h
include kernel32.inc MaS"V`NI
includelib kernel32.lib X}@'FxIF
;数据段 UcI;(Va
.data v:7_ZD6kR
szCaption db 'A MessageBox!',0 [')C]YQb=
szText db 'Hello,world!',0 ]8;2Oh
;代码段 dbG5Cf#K\
.code jMV9r-{*+
start: :*6#(MX
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK }S_#*N)i
invoke ExitProcess,NULL Q%Fa1h:2&
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> C1ZuDL)e
end start BdQ/kXZu+
@?!&M c2
i+&o%nK 2
AWK r;C
BA'Z
BEGIN { print "Hello, world!" } j
:$Ruy
%m5&Y01
];63QJU
BASIC E# UAC2Q
传统版BASIC(例如GWBASIC): /ho7O/aAa
;T,`m^@zf
10 PRINT "Hello, world!" Sz'H{?"
20 END :5,
k64'D
1[k.apn
或在提示符输入: MLk%U 4
lK yeG(
?"Hello, world!":END =_:Mx'7
(BG
wBL
现代版BASIC(例如Quick BASIC): kmZ
U;Z
+F@ZVMp
Print "Hello, world!" aP}30E*Y
59X'-fg ,
以下的语句在Quick BASIC中同样有效: r'E|6_0
mi&mQQ
? "Hello,world!" dZIruZ)x
X*QQVj
2Cgq&\wS
BCPL eX3|<Bf
GET "LIBHDR" 3@8Zy:[8<
fB"It~ p
LET START () BE <]wQ;14;H
$( FesUE_L2$
WRITES ("Hello, world!*N") O;CC(
$) 1}XESAX;0
u|EHe"V"
1P6!E*z\
Befunge vL
]z3
"!dlrow olleH">v e4<[|B!O
, o)r%4YOL
^_@ FL?Ndy"I
h4geoC_W2
Wa!}$q+
Brainfuck \yKYBfp-p
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< <S@XK%
+++++++++++++++.>.+++.------.--------.>+.>. >m'n#=yap
jx[g;7~X
,/Usyb,`
C %XiF7<A&
#include <stdio.h> /Ps5Og
RQQ\y`h`
int main(void) D9/PVd
{ OkfnxknZ|
printf("Hello, world!\n"); qku}cWD9/_
return 0; {T'M4y=)i
} _<m yM2z
yDmx)^En
''3b[<
C++ dk[MT'DV
#include <iostream> aYrbB#
"R
%3v.Z
int main() o%_Hmd;_'
{ Uxb>)36I
std::cout << "Hello, world!" << std::endl; W0;MGBfb
return 0; (_Ky'.
} m>&:)K}m
* G0I2
$-p#4^dg
C++/CLI F|!
ib5
int main() E;-*LT&{
{ s^zX9IVnp
System::Console::WriteLine("Hello, world!"); .F^372hH3
} =QJI_veUG`
'8V>:dy>
_]6n]koD,
C# (C Sharp) rJw
Ws
class HelloWorldApp G^&P'*
{ l,@rB+u
public static void Main() " gQJeMU
{ :>3/*"vx?G
System.Console.WriteLine("Hello, world!"); mT&?DZ9<
} L yNLz
m5
} )=5,S~IT
=)IV^6~b
u=f}t=3
COBOL s]'EIw}mo
IDENTIFICATION DIVISION. ,ocAB;K
PROGRAM-ID. HELLO-WORLD. m
^'!
2 i97
ENVIRONMENT DIVISION. %shCqS
5h@5.-}
DATA DIVISION. UJ7{FN=@t
Bh5z4
PROCEDURE DIVISION. 0}qnq"
DISPLAY "Hello, world!". [iUy_ C=qp
STOP RUN. YlJ_$Q[
h)pYV>!d
3F?_{A
Common Lisp W_RN@O
(format t "Hello world!~%") (g3@3.Kk)
cxpG6c
(,;4f7\
DOS批处理 W,bu=2K6
@echo off 4`'V%)M
echo "Hello, world!" n0%5mTUN
<m0m8p"G
6oy[0hj
Eiffel Wo7`gf_ (
class HELLO_WORLD O6$n VpD3
7_CX6:
creation 1HBWOV7z.?
make S t;@ZV
feature FJ{6_=@D
make is a3c43!J?M
local vpz l{
io:BASIC_IO _WN\9<
do v(~EO(n.
!!io P asVfC@
io.put_string("%N Hello, world!") y,Z2`Zmu
end -- make LX{mr{
end -- class HELLO_WORLD uxbLoE
K:b^@>XH
sGO+O$J
Erlang bA\(oD+:
-module(hello). Z. ,pcnaQb
-export([hello_world/0]).
[
@9a
z C7 b
hello_world() -> io:fwrite("Hello, World!\n"). .\mkgAlyaM
to(lE2`.da
x\aCZ
Forth ccwz:7r
." Hello, world!" CR Q& S 7_
DqA$%b
yyE
5,9cD`WR^
Fortran bJ^Jmb
WRITE(*,10) fU|4^p)
10 FORMAT('Hello, World!') cp2a @
STOP z-^/<u1p
END }fL
] }&
lw_@(E]E
:
`,#z?Rk
HTML *Rgl(Ba
<HTML> #6mr'e1
<HEAD> 5I[6 "o0
<TITLE> Hello World! </TITLE> <.:mp1,8V
</HEAD> wU-Cb<^
<BODY> `a5,5}7v%`
<p>Hello World!</p> ?f:ND1jU
</BODY> H/l,;/q]b
</HTML> Lw`}o` D
p~OX1RBI
f('##pND@
HQ9+ `$ pJ2S
H T;v^BVn
r{wf;5d(
#>2cfZ`6'J
INTERCAL %'eaW
PLEASE DO ,1 <- #13 s8SCEpz
DO ,1 SUB #1 <- #238 -qG7, t
DO ,1 SUB #2 <- #112 ihD|e&
DO ,1 SUB #3 <- #112 2=$ F*B>9
DO ,1 SUB #4 <- #0 Sg1,9[pb
DO ,1 SUB #5 <- #64 rBZ00}
DO ,1 SUB #6 <- #238 XsX];I{E,
DO ,1 SUB #7 <- #26 o(D6
DO ,1 SUB #8 <- #248 = Q"(9[Az
DO ,1 SUB #9 <- #168 L#fS P
DO ,1 SUB #10 <- #24 A_+*b
[P
DO ,1 SUB #11 <- #16 06I(01M1
DO ,1 SUB #12 <- #158 =z'533C
DO ,1 SUB #13 <- #52 7e
/Kh)5G
PLEASE READ OUT ,1 ,irc=0M(
PLEASE GIVE UP ;Bat--K7+
Vk%W4P"l
Qm4cuV-0{
Java t![972.&
public class Hello |T{ZDJ+
{ Tx(=4ALY
public static void main(String[] args) #-/_J?
{ p7[&H