“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。 /zr)9LQY0
Bgp%hK
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》。 P{Q$(rOe
*i!t&s
以下是用不同语言写成的Hello World程序的几个例子: 1u(n[<WtT_
Ada oZdY0n h4
with Ada.Text_Io; use Ada.Text_Io; (E~6fb"c
procedure Hello is DJqJ6 z:'
begin zsR5"Vi=
Put_Line ("Hello, world!"); =.JcIT'
end Hello; dP>FXgY
gv i!|!M=
_'^_9u G
汇编语言 g_?Q3
)n[=)"rf
x86 CPU,DOS,TASM DbtkWq%
MODEL SMALL \'|t>|zhp
IDEAL n-,mC/4
STACK 100H &qIdT;^=I
fKtlfQG
DATASEG tx Qr|\4k
HW DB 'Hello, world!$' B(O6qWsL
x5rLGt
CODESEG .'h^
MOV AX, @data bQ&%6'ck
MOV DS, AX ml!c0<
MOV DX, OFFSET HW BxZ7Bk
MOV AH, 09H kpNp}b8']
INT 21H 'Z%1Ly^b
MOV AX, 4C00H SwaPRAF
INT 21H !XM*y
END ^+k= ;nl
`tXd?E/e
H]f[r~
x86 CPU,GNU/Linux,NASM ]Zc\si3i&
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Lr=^0
;Enter this into "hello.asm" then type: ,}9
tJY@E
;"nasm -f elf hello.asm" h-SKw=n
;"ld hello.o -o hello" 6Tc!=lk
;"./hello" ug;~dhe~
:JZV=@<T
section .data ;data section declaration 9E0x\%2K
msg db 'Hello World!',0AH xr7M#n
len equ $-msg ;string length a`?Vc}&
5PC:4
section .text ;code section declaration <:mK&quf
global _start ;entry point (start of execution) <(yAat$H
_start: mov edx,len ;string length Q("4R
mov ecx,msg ;string start `O;4b#!g
mov ebx,1 ;file handle: stdout ! CJ*zZ*
mov eax,4 ;sys_write 3UKd=YsJ
int 80h ;kernel system call %az6\"n
G)_Zls2;
mov ebx,0 ;return value ?IoA;GBg
mov eax,1 ;sys_exit mZuLwd$0
int 80h ;kernel system call ,WM-%2z^4I
~[~#PO
Pv3G?u=4
x86 CPU,Windows,MASM32 :uC9 #H"b
.386 4^d).{&X
.model flat,stdcall (Jk[%_b>_
option casemap:none b)E<b{'W
;Include 文件定义 FN (O
include windows.inc -(ST
include user32.inc wbh=v;
includelib user32.lib zE?dQD^OD
include kernel32.inc 2v#gCou
includelib kernel32.lib 4x@W]*i
;数据段 obPG]*3
.data Dca,IaT'
szCaption db 'A MessageBox!',0 H0.A;`
szText db 'Hello,world!',0 -})zRL0!'
;代码段 Z+[W@5q
.code M-q5Jfm
start: rw0s$~'
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK %L
wq.
invoke ExitProcess,NULL %Y5F@=>&
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> f&RjvVP?s
end start ^62I 5k/u
]D=fvvST
)%f]P<kq6
AWK 475g-t2"@
BEGIN { print "Hello, world!" } XD_!5+\H1
T=@Ygjk
W
)Ps2
BASIC i&DUlmt)f
传统版BASIC(例如GWBASIC): y7GgTC/H
B?y[ %i
10 PRINT "Hello, world!" T7O)
20 END %=\*OIhl
jpTk@
或在提示符输入: z^WY5~?
>&F:/
?"Hello, world!":END jpoNTl'
rls{~ZRl
现代版BASIC(例如Quick BASIC): x~{W(;`!
N%1nii
Print "Hello, world!" vg_PMy\
x\VP
X
以下的语句在Quick BASIC中同样有效: 8s-X H
~,xso0
? "Hello,world!" @U1t~f^
P97i<pB Y_
6E^9>
BCPL |
q elvK*
GET "LIBHDR" TqOH(={
J(=y$8xje
LET START () BE 4Mt RI
$( wrK@1F9!
WRITES ("Hello, world!*N") P_75-0G
$) i*A_Po
bqx2lQf,_
HEhBOER?
Befunge ,]das
"!dlrow olleH">v _Vt(Eg_\
, yUO%@;
^_@ Uty0mc(
t%f>*}*P*
xh!T,|IR
Brainfuck l0g+OMt
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< bT|-G2g7Z
+++++++++++++++.>.+++.------.--------.>+.>. vGI)c&C>
}nO%q6|\V
2+g'ul`
C aYWUwYB$
#include <stdio.h> /~c9'38
Fzy#!^9Nu
int main(void) F}1._I`-
{ wByTNA7
printf("Hello, world!\n"); pqju@FD*
return 0; \YF07L]qs-
} ,^eOwWV
s vS)7]{cU
{/>uc,8O
C++ >*n4j:
#include <iostream> 0W+RVp=TL1
[8oX[oP
int main() \%V !&
!'
{ S?OCy4dk:
std::cout << "Hello, world!" << std::endl; \0 &$n
return 0; %5@>
nC?`[
} Z$6B}cz<
];N/KHeZ
E]^n\bE%
C++/CLI LZE9]Gd
int main() jJ,y+o
{ U:[CcN/~3
System::Console::WriteLine("Hello, world!"); 9JJ6$cLF
} fRkx ^u
P
6k<3,`VV|
ej=}OH4
C# (C Sharp) :
Cli8#
class HelloWorldApp Wc;N;K52
{ UDnCHGq
public static void Main() H6`zzH0"
{ eW}-UeT
System.Console.WriteLine("Hello, world!"); sN5Mm8~
} lZ <D,&
} pigu]mj
If8
^
wub7w#
COBOL %*IH~/Ld;]
IDENTIFICATION DIVISION. [MKt\(
PROGRAM-ID. HELLO-WORLD. }h8U.k?v
0 wDhX
ENVIRONMENT DIVISION. w]V684[>
Ub4)x
DATA DIVISION. 8H8Q
[ lK`~MlQ
PROCEDURE DIVISION. K2V?[O#
DISPLAY "Hello, world!". bBGg4{
STOP RUN. lEb H4 g
u
bZ`Y$
e:_[0#
Common Lisp |W&K@g$
(format t "Hello world!~%") EZhk(LE
z=8l@&hYLq
n,_9Eh#WD
DOS批处理 !<b+7A
@echo off O-P`HKr
echo "Hello, world!" wi[FBLB/8
<dz_7hR"
/sPa$D
Eiffel ]g,j
class HELLO_WORLD PQz[IZ
*e<'|Kq
creation %>y!N!.F
make ]@ Vp:RGMr
feature Y$+v "
make is wWq-zGH|&