“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。 ?Z9C}t]
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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》。 <=[,_P6|
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以下是用不同语言写成的Hello World程序的几个例子: +L03.rf
Ada j}t"M|`
with Ada.Text_Io; use Ada.Text_Io; -}#=L@
procedure Hello is k<(G)7'gm
begin -5B>2K F
Put_Line ("Hello, world!"); 5#|D1A
end Hello; DLggR3K_\
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汇编语言 {,xI|u2R
Ck.LsL-
x86 CPU,DOS,TASM mqe83 k%
MODEL SMALL \vwsRT 1
IDEAL 6bPoC$<Z
STACK 100H nYy%=B|>
}9=X*'BO
DATASEG
h.T]J9;9
HW DB 'Hello, world!$' m-T@Og
u*}[fQ`aF
CODESEG ^EtBo7^t
MOV AX, @data 1'Sr0
oEd3
MOV DS, AX \EI<1B
MOV DX, OFFSET HW zy8Z68%E`*
MOV AH, 09H @G'&7-(h*
INT 21H m{#?fR=9
MOV AX, 4C00H J)o.@+Q}
INT 21H j}s<Pn%4
END J:D{5sE<|
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+9 gI^Gt
x86 CPU,GNU/Linux,NASM =#=<%HPT
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). k]>1@t
;Enter this into "hello.asm" then type: =:fN
;"nasm -f elf hello.asm" v;6O# ta'
;"ld hello.o -o hello" j(xVbUa
;"./hello" <[l0zE5Z8'
-ElK=q
section .data ;data section declaration ~?6M4!u
msg db 'Hello World!',0AH O~P1d&:L
len equ $-msg ;string length OkNBP0e}
L/Tsq=
section .text ;code section declaration DjLSl,Z
global _start ;entry point (start of execution) Z-U-n/6I
_start: mov edx,len ;string length t GS>f>i
mov ecx,msg ;string start ] S0tK
mov ebx,1 ;file handle: stdout 4
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mov eax,4 ;sys_write C(Cuk4K
int 80h ;kernel system call wjzR 8g0bQ
XfZ^,'z
mov ebx,0 ;return value OUtXu7E$
mov eax,1 ;sys_exit WY& [%r
int 80h ;kernel system call ZbAg^2
n9H4~[JiC
N\{{:<Cp\
x86 CPU,Windows,MASM32 /gH[|d
.386 $eu-8E'
.model flat,stdcall ,@Fde=Lw
option casemap:none vk><S|[n
;Include 文件定义 Mn<#rBE B
include windows.inc e+~Q58oD
include user32.inc L,\wB7t
includelib user32.lib b[/uSwvi
include kernel32.inc p)e?0m26
includelib kernel32.lib .P:mYC
;数据段 w<|Qezi3
w
.data Z1dLC'/b]
szCaption db 'A MessageBox!',0 VN/v]
szText db 'Hello,world!',0 huat,zLS
;代码段 %G`GdG}T
.code Wm^RfxgN/
start: KD =W(\
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK o4t6NDa
invoke ExitProcess,NULL UJ?qGOM3x>
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 7[I%UP
end start P1_ZGeom*
S x0QPX
8!XK[zL
AWK 5jey%)=
BEGIN { print "Hello, world!" } s(0"r.
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!;, Dlq-}
BASIC M5Q7izM
传统版BASIC(例如GWBASIC): d:!A`sk7
oMeIXb)z
10 PRINT "Hello, world!" Oz1S*<]=,~
20 END b haYbiX?
U6xs'0
或在提示符输入: ;&} rO.0
^Q9!DF m
?"Hello, world!":END Sg+0w7:2
b[Qe} `W
现代版BASIC(例如Quick BASIC): ^rh{
0-at#r:
Print "Hello, world!" 2tqj]i
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以下的语句在Quick BASIC中同样有效: |r<#>~*
+ t7n6
? "Hello,world!" ?,z/+/:
ad#4W0@S
hdN[wC]
BCPL 61pJVOe
GET "LIBHDR" +i@{h9"6g
I-L:;~.
LET START () BE 0nsj ihw
$( iOrpr,@
WRITES ("Hello, world!*N") `Kb"`}`_vm
$) ]
^s,
:cA%lKg
,SG-{
Befunge \'hZm%S
"!dlrow olleH">v
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, O.z\
VI2f
^_@ dxi5p!^^9
)aAKxC7w
!m:rtPD'
Brainfuck U+ANSW/
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< k];NTALOG
+++++++++++++++.>.+++.------.--------.>+.>. r7Zx<c
oY<R[NYKu
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C YmPNaL
#include <stdio.h> C3:CuoE X
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int main(void) uA;vW\fHr
{ C8W4~~1S
printf("Hello, world!\n"); 9D[Jn}E:
return 0; /8Ru O
} 0BrAgv"3a_
$_f"NE}
.I %`yhCW
C++ E+z"m|G
#include <iostream> ?aWMU?S
^_c6Op<F
int main() #p7K2
{ ]$&N"&q
std::cout << "Hello, world!" << std::endl; n^iq?u
return 0; y
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} rsn^YC
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C++/CLI s2`Qh9R
int main() H&SoVi_V
{ o2rL&
System::Console::WriteLine("Hello, world!"); S!8gy,7<J
} G$A=T u~
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v%@)I_6[P
C# (C Sharp) KdXqW0nm
class HelloWorldApp wV^c@.ga
{ ?np3*;lw
public static void Main() 0vZ49}mb)
{ m[DCA\Mo@
System.Console.WriteLine("Hello, world!"); 9>k_z&<
} 4l'`q+^-
} *2>kic
aH
W9!K~g_
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COBOL :5[1Iepdn
IDENTIFICATION DIVISION. K_ Od u^
PROGRAM-ID. HELLO-WORLD. v3b+Ddp
DH Qs_8Df
ENVIRONMENT DIVISION. <O0.q.
I=2b)"t0
DATA DIVISION. $pJw
p{kN
t.Yf8Gy
PROCEDURE DIVISION. (v}4,'dS
DISPLAY "Hello, world!". i]15g@
STOP RUN. _=_<cgy1u
p(!d,YSE
*f o>
Common Lisp 7 T
(format t "Hello world!~%") 722:2 {
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Y/ I32@
DOS批处理 k}0b7er=R
@echo off "1Y'VpKm(~
echo "Hello, world!" Ay0.D FL
Z(I=KBI
s63!]LDr
Eiffel [H@71+_Q
class HELLO_WORLD dJ{q}U
iAo/Dnp2J
creation ]j0/.pG
make $38)_{
feature N/78Ub
make is k~*%Z!V}C
local .Ta (v3om%
io:BASIC_IO )&j@ ={0
do 89x;~D1
!!io ?$#P
=VK
io.put_string("%N Hello, world!") UM<!bNz`
end -- make 8j)*T9
end -- class HELLO_WORLD _<KUa\
=&F~GCZ>
R PdFLC/
Erlang K\FLA_J
-module(hello). 3sD|R{
-export([hello_world/0]). 1:!H`*DU&
*yv@B!r
hello_world() -> io:fwrite("Hello, World!\n"). F:og :[
01~
nC@;
SuXeUiK.[
Forth '+\t,>nRkl
." Hello, world!" CR x~Dj2F ]
JwQ/A[b
IGOEqUw*
Fortran 82iFk`)T
WRITE(*,10) sYbmL`{
10 FORMAT('Hello, World!') SBI*[
STOP nS](d2
END i5aY{3!
zpjE_|
]$=#:uf
HTML x4K A8
<HTML> @N]]Cf>x
<HEAD> Lg~ll$
U
<TITLE> Hello World! </TITLE> O-huC:zZh
</HEAD> m}7Nu
<BODY> cn Ohj
<p>Hello World!</p> A*g-pJh
</BODY> msY6zJc`
</HTML> c:[ZknnCe
GVhy
}0|
)<lQJ#L86a
HQ9+ bct8~dY
H ,m8mh)K?0>
(vp#?-i
/+1(,S
INTERCAL p| ?FA@ 3
PLEASE DO ,1 <- #13 0Py*%}r1
DO ,1 SUB #1 <- #238 a`R_}nus*
DO ,1 SUB #2 <- #112 d<6m_!L
DO ,1 SUB #3 <- #112 CXi[$nF3
DO ,1 SUB #4 <- #0 IdM~'
Q>\
DO ,1 SUB #5 <- #64 >g m
DO ,1 SUB #6 <- #238 !ewT#afyu(
DO ,1 SUB #7 <- #26 t3h ){jZ
DO ,1 SUB #8 <- #248 Sy']fGvx
DO ,1 SUB #9 <- #168 Gt+rVJ=v
DO ,1 SUB #10 <- #24 &%%ix#iF
DO ,1 SUB #11 <- #16 5YneoM]Q
DO ,1 SUB #12 <- #158 #; f50j!r
DO ,1 SUB #13 <- #52 3YJ"[$w='(
PLEASE READ OUT ,1 w2 r
PLEASE GIVE UP zez|l
[N12X7O3
MT7B'hd
Java ~oJ"si
public class Hello =^SxZ Bn
{ \2]_NU5.
public static void main(String[] args) \Hdsy="Dnh
{ lF_"{dS_6(
System.out.println("Hello, world!"); -QwH|
} px*1 3"
} XDHi4i47`o
050,S`%<g8
',c~8U#q
JSP gJCZ9{Nl
<% }8POm#
out.print("Hello, world!"); NJ]3qH
%> Y%eq2%
Vn_~ |-Wt
Kk*8
MIXAL l*6Zh"o:
TERM EQU 19 the MIX console device number 8NiR3*1
ORIG 1000 start address uovv">Uw
START OUT MSG(TERM) output data at address MSG [h8s0
HLT halt execution %~y>9K
MSG ALF "MIXAL" !-.GfI:q
ALF " HELL" OQ-
Hn-H
ALF "O WOR" hf^<lJh~=
ALF "LD " :m(DRD
END START end of the program V$sY3,J7A%
ZPyzx\6\
r fzNw
Nuva Zazff@O *
<..直接输出..> *yaS^k\
Hello, world! zh|9\lf
JXM]tV
<..或者..> uKd4+Km
L,[Q{:C S
<. ]8}51y8
// 不带换行 yu)^s!UY;
? "Hello, world!" AYgXqmH~+
u*TC8!n
// 或者 B\v+C!/f|
B6Eu."T
// 带换行 993f6
?? 'Hello, world!' :aK?Dt Z
.> :8!RGtn
5nUJ9sqA
Ml7
(<J
OCaml :nQlS
let main () = h%krA<G9
print_endline "Hello world!";; Rd&DH_<+^
*<\K-NSL
s4~[GO6>
Pascal 'gvR?[!t
program Hello; 3iIy_nWC
begin C+llA
writeln('Hello, world!'); sVK?sBs]
end. 8.[F3Tk=
=9X1 +x
d<6F'F^w.7
Perl NS~;{d\
#!/usr/local/bin/perl )63
$,y-;$
print "Hello, world!\n"; L%T(H<