“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。 %<an9WMF
N4L|;?
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》。 h-Fn?
>(?9?
以下是用不同语言写成的Hello World程序的几个例子: p;tVn{u
Ada `kZ@Zmj#
with Ada.Text_Io; use Ada.Text_Io; 3td)'}
procedure Hello is ]dI2y=[!C
begin }^/9G17
Put_Line ("Hello, world!"); c@/(B:@
end Hello; 1oN^HG6O
ENGg
~D
/+\uqF8F
汇编语言 dt`{!lts'
V&Xe!S
x86 CPU,DOS,TASM pXJpK@z
MODEL SMALL n#wI@W>%+
IDEAL W!?7D0q
STACK 100H bpKZ3}U
~~SwCXZ+b^
DATASEG >i5acuth
HW DB 'Hello, world!$' ;S57w1PbVA
&:, dJ
CODESEG jF=gr$
MOV AX, @data :yeq(oK,
MOV DS, AX dv.(7Y7.x
MOV DX, OFFSET HW b+f'[;
MOV AH, 09H mxz-4.
INT 21H 0el9&l9Ew
MOV AX, 4C00H 1#0{@35
INT 21H ++V=s\d7
END 0IfKJ*]M
b#K:_ac5
O'W0q;rT
x86 CPU,GNU/Linux,NASM Yx eOI#L
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ~wJFa'2
;Enter this into "hello.asm" then type: 8erSt!oM
;"nasm -f elf hello.asm" >|twyb
;"ld hello.o -o hello" 't6V:X
;"./hello" /)4I|"}R0I
[$ejp>'Ud
section .data ;data section declaration |b|&XB_<]Z
msg db 'Hello World!',0AH )*,5"CO
len equ $-msg ;string length wYQ&C{D%
tb$LriN
section .text ;code section declaration _c,'>aH=
global _start ;entry point (start of execution) +=.W<b
_start: mov edx,len ;string length Kwg4sr5"D
mov ecx,msg ;string start l PK
+$f$
mov ebx,1 ;file handle: stdout ,=|ZB4HA
mov eax,4 ;sys_write + j W1V}h
int 80h ;kernel system call QoG cWJ
1;mW,l'`
mov ebx,0 ;return value 8[J}CdS
mov eax,1 ;sys_exit /ig:9R
int 80h ;kernel system call []A%<EI7
/k<WNZM
4Rvf
x86 CPU,Windows,MASM32 jSwf*u
.386 \o/n
.model flat,stdcall uU:CR>=AKW
option casemap:none CC@.MA@9N
;Include 文件定义 ?_Q/}@`
include windows.inc qt;y2gf=
include user32.inc Hrz f'a|^
includelib user32.lib #_(jS+lP?k
include kernel32.inc 5JLu2P
includelib kernel32.lib `$B3X
;数据段 :@!ic<p
.data Qbyv{/
szCaption db 'A MessageBox!',0 e}.^Tiwd]
szText db 'Hello,world!',0 -tyK~aasQ
;代码段 ngat0'oa
.code /l<<_uk$
start: hYM@?/(q
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Xa[?^P
invoke ExitProcess,NULL o4zM)\;F
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> FDv+*sZ
end start "B8"_D&
JGH60|
DNj"SF(J
AWK 2w-51tqm
BEGIN { print "Hello, world!" } Hx\H $Y
Pw;!uag
TM|)Ljm
BASIC M>>qn_yq4
传统版BASIC(例如GWBASIC): ,i,q!M{-
8WXJ.
10 PRINT "Hello, world!" yNqe8C,>e
20 END vMs$ceq
EB_NK
或在提示符输入: d R]Q$CJ
o`q_wdy?
?"Hello, world!":END _dJ{j
<1.A=_
M
现代版BASIC(例如Quick BASIC): ul ER1\W
?1[\!
Print "Hello, world!" /M*a,o
zdEPDdB
以下的语句在Quick BASIC中同样有效: p$x{yz3
" $ew~;z
? "Hello,world!" Iz{R}#8CZ
IW%|G
S.d^T](
BCPL \0H's{uek
GET "LIBHDR" j`*#v
*mMEl]+
LET START () BE =pznu+,
$( MiRdX#+Y
WRITES ("Hello, world!*N") x"CZ]p&m
$) }A:<%N
2d {y M(=(
sqS=qC
Befunge XxaGp95so
"!dlrow olleH">v ~35U]s@v
, /2HN>{F^Y
^_@ ?l $Nf@-
7zv1wb
viAMr"z
Brainfuck jOyvDY9\
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< S>0nx ^P
+++++++++++++++.>.+++.------.--------.>+.>. ZZ.m(ATR
A,)VM9M_l
1& '8Y
C WMBm6?54
#include <stdio.h> `r_m+]
(
&frUQm
int main(void) =Mb1o[
{ TcGoSj<Z
printf("Hello, world!\n"); F|HJH"2*&q
return 0; 6O22P?v
} \J6hI\/4^
|/|
`WOYoec
C++ Y2[A2Uy$ef
#include <iostream> ZDC9oX @
J-<^P5
int main() BkZV!Eg
{ C( id=F
std::cout << "Hello, world!" << std::endl; $\"9<o|h
return 0; -dO'~all
} ]D!k&