“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。 |7KeR-
>q7BVF6V|
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》。 YJ:3!B>Zo
+ki{H}G21
以下是用不同语言写成的Hello World程序的几个例子: I!wX[4p eg
Ada <58l;<0
with Ada.Text_Io; use Ada.Text_Io;
{NJfNu
procedure Hello is Ix|~f1*%
begin }Yv\0\~'W|
Put_Line ("Hello, world!"); {m`A!qcD|
end Hello; 3Oa*%kP+
@/&b;s73
ESoAzo,u
汇编语言 +\"-P72vjk
gDIBnH
x86 CPU,DOS,TASM ?RzD Qy D
MODEL SMALL kw`WH)+F
IDEAL <ER'Ed
STACK 100H hAj1{pA,
nv<` K9d
DATASEG B-d(@7,1
HW DB 'Hello, world!$' *6BThvg|&X
R4Rb73o
CODESEG k-*Mzm]kb
MOV AX, @data VYw%01#
MOV DS, AX IcIOC8WC
MOV DX, OFFSET HW FecktD=
MOV AH, 09H 5(
_6+'0
INT 21H umLb+GbI4
MOV AX, 4C00H ,i.%nZw\
INT 21H xug)aE
END iRi{$.pVJ
d1joVUYE
#Dfo#]k(
x86 CPU,GNU/Linux,NASM _8G>&K3T<
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). g+PPW88P;
;Enter this into "hello.asm" then type: vB!|\eJ
;"nasm -f elf hello.asm" //Ai.Q.J[
;"ld hello.o -o hello" 3/JyUh?
;"./hello" , %YBG1E[y
}`yiT<z
section .data ;data section declaration f f 7(
msg db 'Hello World!',0AH V,EF'-F
len equ $-msg ;string length \M]-bw`
^Y{D^\},
section .text ;code section declaration *V(Fn-6(
global _start ;entry point (start of execution) H6aM&r9}
_start: mov edx,len ;string length ):EBgg4-N
mov ecx,msg ;string start /HZumV?
mov ebx,1 ;file handle: stdout O3V.^_k;
mov eax,4 ;sys_write l.nH?kK<
int 80h ;kernel system call F~U!1)
]TstSF=
mov ebx,0 ;return value IF*&%pB
mov eax,1 ;sys_exit _y .]3JNm
int 80h ;kernel system call M2@^bB\J
5.tvB
Tp<k<uKD
x86 CPU,Windows,MASM32 bzi|s5!'<
.386 pUl8{YGS
.model flat,stdcall $\AEWFB
option casemap:none nU`Lhh8y
;Include 文件定义 }%n5nLU`
include windows.inc f=J<*h
include user32.inc #pdUJ2)yM
includelib user32.lib W4YE~
include kernel32.inc GD-&_6a
includelib kernel32.lib /NF# +bx
;数据段 NN
0Q`r,8}
.data r+<{S\ Q
szCaption db 'A MessageBox!',0 si(;y](
szText db 'Hello,world!',0 ;HOPABWz)
;代码段 #ZiT-
.code dPjhq(8 zU
start: 7.bN99{xPM
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK v[<Bjs\q5
invoke ExitProcess,NULL q;AT>" = )
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> P,bd'
end start (sw-~U%
8n4V
cu
cjULX+h
AWK L(&}Wv
BEGIN { print "Hello, world!" } *Zd84wRSj
oQ+61!5>
L4f7s7rJ
BASIC TOI4?D]
传统版BASIC(例如GWBASIC): lu UYo
:6;e\UE
10 PRINT "Hello, world!" |s gXh9%x<
20 END 5nCu~<uJ
``?6=mO
或在提示符输入: A~lIa$U$b
PI5j"u UO
?"Hello, world!":END @{Py %
3]E(mRX
现代版BASIC(例如Quick BASIC): |kiJ}oy
'4;6u]d)2
Print "Hello, world!" -pTI?
)"O{D`uX
以下的语句在Quick BASIC中同样有效: 6&2LWaWMo$
;)!"Ty|
? "Hello,world!" k4KHS<n0
C>|@& o1
7y*ZXT]f
BCPL k3@HI|
GET "LIBHDR" $R{8z-,Q
g8pm2o@S
LET START () BE L*]E`Xxd9
$( >HkhAJhW
WRITES ("Hello, world!*N") F}ukZ
DB
$) HW7FP]NH
:Eh'(
evl-V>
Befunge 'zgvQMu
"!dlrow olleH">v sM\&.<B
, lUh*?l
^_@ ]T{E
(9
]" x\=A
qjC_*X!
Brainfuck !}&"W,,0
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< :7;[`bm(G
+++++++++++++++.>.+++.------.--------.>+.>. c8'Cq7
2DMrMmLI
WBppKj_M
C -4L!k'uR
#include <stdio.h> RSWcaATZN
@eQld\h'
int main(void)
Go+[uY^
{ I
8Y*@$h
printf("Hello, world!\n"); <Dw]yGK@
return 0; 6`puTL?
} + Oobb-v
QXk"?yT`E
u2qV 6/
C++ P%o44|[][
#include <iostream> c"Y!$'|Q
U|fTb0fB
int main() z<a2cQ?XQ
{ !
sYf<
std::cout << "Hello, world!" << std::endl; #w~0uCzQ@
return 0; s'2Rs^,hN
} S=R3"~p
lpEDPvD_Vm
kHU"AD}.
C++/CLI 8&a_A:h
int main() ,hE/II`-d'
{ M9V-$ _)
System::Console::WriteLine("Hello, world!"); -l.pA(O
} .S vyj
?f2G?Y
_ 5\AS+[x
C# (C Sharp) 52<~K
class HelloWorldApp {^&k!H2
{ ;mJkqbVol
public static void Main() Y-&|VE2
{ 2lz
{_9
System.Console.WriteLine("Hello, world!"); G\/IM
} nu 7lh6o=
} Wu{&;$
=WRO\lgv.
3h JH(ToO
COBOL Dt {')
IDENTIFICATION DIVISION. Y.
TYc;
PROGRAM-ID. HELLO-WORLD. _bQL[eXd
Oc-u=K,B
ENVIRONMENT DIVISION. ze"~Ird
L[]^{ O
DATA DIVISION. HU[oR4E
i=da,W=0
PROCEDURE DIVISION. 5^|"_Q#:
DISPLAY "Hello, world!". ]GS~i+ =M
STOP RUN. RSH/l;ii
;F,qS0lzE
!"(u_dFw
Common Lisp 8?Wgawx
(format t "Hello world!~%") v!!;js^
{"4<To]z
P7>IZ >bw
DOS批处理 B "n`|;r5
@echo off rU*q@y
Px
echo "Hello, world!" 9UmBm#"
Y2vj}9jK
\L#QR
Eiffel }*-u$=2
class HELLO_WORLD 5vGioO
j1F w
U
creation ]|BojSL_
make E(/ sXji!
feature A5+5J_)*
make is T/7vM 6u
local !c_u-&b)
io:BASIC_IO HwW6tQ
do U 1F-~{r
!!io 7%op zdS#
io.put_string("%N Hello, world!") #[,= 1Od(q
end -- make d
qpgf@
end -- class HELLO_WORLD =jG?v'X
w7ZG oh(
r:#Q9EA
Erlang uri*lC
-module(hello). =WjJN Q
-export([hello_world/0]). 5l&j