“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。 R+@sHsZ@
f(9$"Vi
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 gzJ{Gau{)
7kWZMi
以下是用不同语言写成的Hello World程序的几个例子: ;{F;e)${M
Ada o#KPrW`XJ/
with Ada.Text_Io; use Ada.Text_Io; 4,R\3`b
procedure Hello is ?L~=Z\H
begin D;
35@gtj
Put_Line ("Hello, world!"); \e5,`
end Hello; JVIcNK)
TnZc.
XQ4^:3Yc
汇编语言
aF4V|?+
[XY:MUe
x86 CPU,DOS,TASM r)Mx.`d!
MODEL SMALL 3<1HqU
IDEAL R;Ix<y{U
STACK 100H Hhce:E@K
b$$L]$q2
DATASEG 6r-<XNv)0
HW DB 'Hello, world!$' zxynEdO
xVwi
}jtG|
CODESEG j{Qbzczy,
MOV AX, @data &&QDEDszp
MOV DS, AX hnfrnYH
MOV DX, OFFSET HW QeOt;{_|
MOV AH, 09H S92!jp/
INT 21H _`Yvfz3
MOV AX, 4C00H #dn%KMo2r
INT 21H $BO}D
END EF7|%N
fAA@ziKg
ss M9t
x86 CPU,GNU/Linux,NASM d9e H}#OY
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). JwG5#CFu^
;Enter this into "hello.asm" then type: e^l+#^fR
;"nasm -f elf hello.asm" oT5rX
,8
;"ld hello.o -o hello" 3Jk?)Dy
;"./hello" :N'[de
uhN(`E@
section .data ;data section declaration l.W 1$g
msg db 'Hello World!',0AH J|64b
len equ $-msg ;string length _tauhwu
b\uB
section .text ;code section declaration /Z9`uK
global _start ;entry point (start of execution) fN? Lz%z3
_start: mov edx,len ;string length v.8S
V]
mov ecx,msg ;string start 9[]"%6
mov ebx,1 ;file handle: stdout gQzJ2LU(
mov eax,4 ;sys_write 1_E3DXe
int 80h ;kernel system call :92a34
HuLm!tCu
mov ebx,0 ;return value `5 v51TpH
mov eax,1 ;sys_exit #L*@~M^]
int 80h ;kernel system call %cjGeS6}
BrH`:Dw
}Us$y0W\
x86 CPU,Windows,MASM32 @snLE?g j
.386 1X:whS5S
.model flat,stdcall ]e3}9.
option casemap:none
0{Ll4
;Include 文件定义 pUEok +
include windows.inc kGTc~p(
include user32.inc Vgb>3]SU
includelib user32.lib 9,a,A6xry
include kernel32.inc 3b/vyZF
includelib kernel32.lib YNQ6(HA
;数据段 vYm&AD
.data {,mRMDEy
szCaption db 'A MessageBox!',0 v}*u[GWl]
szText db 'Hello,world!',0 w!9W Cl]9M
;代码段 "l;8
O2;g
.code ,8 NEnB
start: l$~bkVNL
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 7|eSvC
invoke ExitProcess,NULL OU3+SYM
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> DO,&Foh\
end start S/:QVs
e ~,'|~
C5
s/&]gj"
AWK &^D@(m7>{K
BEGIN { print "Hello, world!" } I!0+RP(
GpQF* x
:H8L (BsI
BASIC g[+Q~/yq
传统版BASIC(例如GWBASIC): /F9lW}pd
U$JIF/MO_
10 PRINT "Hello, world!" WsDe0F
20 END R3!vS+5rR
X|B;>q
或在提示符输入: Y/I6.K3
aZCT|M1
?"Hello, world!":END `Q^Sm`R
B]}V$*$\?
现代版BASIC(例如Quick BASIC): M4PUJZ]
KcF+!;:
Print "Hello, world!" Q3{&'|}^2
!l~aRj-WZ
以下的语句在Quick BASIC中同样有效: /{)cI^9
Gv3Fg[MA@c
? "Hello,world!" /g7?,/vnZ
SpiC0
[MP:Eeg
BCPL S&)
>w5*]U
GET "LIBHDR" O!+5As
R2ZQBwB
LET START () BE x#VUEu]8
$( IGV.0l
WRITES ("Hello, world!*N") 1>{-wL4rc
$) __%E!*m"<_
\k-juF80
_%%"Y}
Befunge (>`SS#(T!
"!dlrow olleH">v >^HTghgRD
, w:+#,,rwzV
^_@ X[Gk!dr#
QNwAuH T
r:rJv
Brainfuck ryLNMh
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< g'7hc~=
+++++++++++++++.>.+++.------.--------.>+.>. u(`A?H:
O!Cu.9}
(,y/nc=GN
C M.^A`
#include <stdio.h> `bF;Ew;
=_6h{f&Q
int main(void) 7V``f:#d
{ FQ1oqqr
printf("Hello, world!\n"); ,]qX_`qF
return 0; .g?,:$`0D?
} nQ3goVRFP
eakIK+-21y
^i1:PlW]
C++ L4Y3\4xXO
#include <iostream> dV
IomJo
int main() #vwXx r
{ >g2.z>
std::cout << "Hello, world!" << std::endl; JAlsc]XtO9
return 0; 74Wg@!P
} s\R?@
t+q`h3
E1g$WhXIS
C++/CLI [&V%rhi
int main() S6X<3L`FfH
{ Rx-i.Et Z
System::Console::WriteLine("Hello, world!"); uelTsn
} +N_%|!F-c
R?SHXJ%'
R/|{?:r?:x
C# (C Sharp) AE
_~DZ:%c
class HelloWorldApp dig76D_[e
{ ]zY'w,?D\F
public static void Main() >L4$DKO
{ /MtacR
System.Console.WriteLine("Hello, world!"); 7?] p\`
} ob
#XKL
} tpK4 gjf
RL9BB.
!,"G/}'^;
COBOL '|T=
IDENTIFICATION DIVISION. OG`Oi^2
PROGRAM-ID. HELLO-WORLD. B[V=l<J
_,~zy9{,
ENVIRONMENT DIVISION. 3zHiu*2/!
s'4p+eJ
DATA DIVISION. KIJ[ cIw
h]P$L>
PROCEDURE DIVISION. oFp&j@`k8j
DISPLAY "Hello, world!". |;yb *
STOP RUN. fh<G&E8
p
bnQO}G
.5xg;Qg\Y
Common Lisp =1capix 1r
(format t "Hello world!~%") $0t
%}DE
gs>cx]>
;0gpS y$#
DOS批处理 [K- s\
@echo off
N\$wpDI~
echo "Hello, world!" JM%#L *;
m
Y0C7i
A>puk2 s
Eiffel *Rd&4XG
class HELLO_WORLD wQc w#
8>9+w/DL
creation OLwxGRYX
make %Z4=3?5B"9
feature V^i3:'
make is #v-!GK_<
local ./'n2$^3
io:BASIC_IO !TFVBK
do L')zuI
!!io kZNZ?A<D
io.put_string("%N Hello, world!") b&1@rE-
end -- make r "R\
end -- class HELLO_WORLD D~:fn|/Brp
8^lXM-G-
Xc^~|%+
Erlang 8h97~$7)
-module(hello). 4Q5v8k=
-export([hello_world/0]). G
w[&P%
icmDPq
hello_world() -> io:fwrite("Hello, World!\n"). |sh U
3[rB:cE/
xo$ZPnf(zv
Forth "K<