“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。 bAeC=?U
_$NFeqLww
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 V?
w;YTg
C&,&~^_F
以下是用不同语言写成的Hello World程序的几个例子: #!OCEiT_
Ada KFdV_e5lU
with Ada.Text_Io; use Ada.Text_Io; ]=2Ba<)m
procedure Hello is
b~Op1p
begin f`.8.1Rd
Put_Line ("Hello, world!"); O>wGc8Of\
end Hello; vJ7I
[Z
LgjL+w19
"'4R_R
汇编语言
X~sl5?
L|qQZ=
x86 CPU,DOS,TASM w W1aG
MODEL SMALL `Ff3H$_*
IDEAL KIC5U50J
STACK 100H ixw3Z D(>+
&xgMqv2/
DATASEG Q$Ga.fI
HW DB 'Hello, world!$' JWr:/?
wXMKQ)$(
CODESEG KF|+#qCN
MOV AX, @data >t)vQ&:;u
MOV DS, AX U>IllNd
MOV DX, OFFSET HW !Sy._NE`z
MOV AH, 09H Y
_m4:9p
INT 21H P\tP0+at
MOV AX, 4C00H =GL}\I
INT 21H cZk?o
END xKWqDt
2xhwi.u
HlqCL1\<
x86 CPU,GNU/Linux,NASM \-0@9E<D
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). u01 'f-h
;Enter this into "hello.asm" then type: sD7Qt
;"nasm -f elf hello.asm" L$cNxz0$
;"ld hello.o -o hello" #M$[C d
I$
;"./hello" Jor>YB`X
-GD_xk
section .data ;data section declaration "yCCei,hA?
msg db 'Hello World!',0AH ^o_2=91
len equ $-msg ;string length =dHM)OXD"
{^i7 3}@O
section .text ;code section declaration S 3Tp__
global _start ;entry point (start of execution) 9 JBPE
_start: mov edx,len ;string length .9
mwRYgD
mov ecx,msg ;string start 01g=Cg
mov ebx,1 ;file handle: stdout >N@tInE
mov eax,4 ;sys_write {UX?z?0T
int 80h ;kernel system call gV$j ]
%I9{)'+@x
mov ebx,0 ;return value X|q&0W=
mov eax,1 ;sys_exit #:s*)(Qn
int 80h ;kernel system call [4"1TyW
swYlp
kQ7$,K#
x86 CPU,Windows,MASM32 mTz %;+|L
.386 Tz4,lwuWX7
.model flat,stdcall uz-,)
option casemap:none +D[|L1{xb
;Include 文件定义 R
5-q{
include windows.inc <k<K"{
include user32.inc rdhK&5x*
includelib user32.lib =dx!R ,Bw
include kernel32.inc _Db=I3.HJ
includelib kernel32.lib MP(R2y
;数据段 btHN
.data seC]=UJh#>
szCaption db 'A MessageBox!',0 eqU2>bIf
szText db 'Hello,world!',0 VR ^qwS/
;代码段 f.JZ[+
.code mE'y$5ZxY
start: ye:pGa w
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK /x,gdZPX
invoke ExitProcess,NULL e:fp8 k<
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 91qk0z`N
end start Ef{rY|E
@wy|l)%
WSi`)@.XO
AWK g6{.C7m
BEGIN { print "Hello, world!" } p4Cw#)BaS
ZQXv-"
u?5d%]*
BASIC R''nZ/R
传统版BASIC(例如GWBASIC): S-}MS"
fOJ0#^Z
10 PRINT "Hello, world!" zs
e<b/G1G
20 END >J[Bf9)>
|I-;CoAg
或在提示符输入: ~qt)r_jW
3:@2gp!tq
?"Hello, world!":END Jz7a|pgep
hr_ 5D
现代版BASIC(例如Quick BASIC): aDmyr_f$
'kb5pl~U
Print "Hello, world!" Gdmh#pv
&[:MTK?x!
以下的语句在Quick BASIC中同样有效: 4)0 %^\p
QEKSbxL\W
? "Hello,world!" i!+D
,O
BLZ#vJR
6r!
Y ~\@
BCPL 4
AZ~<e\
GET "LIBHDR"
*vt5dxB
B!-hcn]y
LET START () BE }/&Q\Sc
$( (XA=d
4
WRITES ("Hello, world!*N") M4
SJnE
$) Cw42bO
<6QG7i
uMVM- (g%
Befunge s3qWTdM
"!dlrow olleH">v nfpkWyI u{
, w}No ^.I*4
^_@ OzY55
=sy>_
q9cmtZrm
Brainfuck U"$Q$ OFs
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Ck;O59A"&-
+++++++++++++++.>.+++.------.--------.>+.>. 7?Q@Hj(:NT
BC*vG=a
_nu,ks+
C U<,@u,_Ja
#include <stdio.h> 2gz}]_
kms&o=^
int main(void) D^Ahw"X)
{ .{sKEVK
printf("Hello, world!\n"); *z[G+JX
return 0; XndGe=O
} Z0&^U#]
S^q)DuF5!
N<lejZ}!q
C++ w1HE^
/
#include <iostream> rt">xVl
'F%4[3a$\n
int main() Z|;<:RKWY
{ _svEPHU
std::cout << "Hello, world!" << std::endl; 06DT2
return 0; }
8ZCWmd
} ].F7.
zi
@_"B0$,-i
:#D?b.=
C++/CLI Vp8t8X1`
int main() s2f95<B
{ J)1:jieQ
System::Console::WriteLine("Hello, world!"); RtVy^~=G
} r/v'h@
<;O=h;
~|
r@C2zF7
C# (C Sharp) P^m+SAAB
class HelloWorldApp nk.Y#+1)
{ [Du@go1C
public static void Main() Z$qFjWp
{ 3t<XbHF9
System.Console.WriteLine("Hello, world!"); U'^AJ2L8
} +5J "G/f
} [h>|6%sW
<$\vL
&v!=\Fig4
COBOL pR_cI]{=SA
IDENTIFICATION DIVISION. l`lo5:w
PROGRAM-ID. HELLO-WORLD. KrOoxrDcp
s( @w1tS.
ENVIRONMENT DIVISION. sYV7t*l
C${{&$&