“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,;ca6>5H
7I;kh`H$(f
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 (H_dZL
'?C6P5fm
以下是用不同语言写成的Hello World程序的几个例子: 7Bj,{9^aJ
Ada MhN;GMH
with Ada.Text_Io; use Ada.Text_Io; -,")GA+[7
procedure Hello is ! VR&HEru
begin D1rVgM
Put_Line ("Hello, world!"); u=0O3-\h
end Hello; {JfQQP&FV
|<Ls;:5.
\\SQACN
汇编语言 e \Qys<2r
F;Q,cg M
x86 CPU,DOS,TASM s!(R
MODEL SMALL L3{(Bu
IDEAL 2Wzx1_D"a
STACK 100H -K/+}4i3N
[|:{qQyD
DATASEG zyS8LZ-y9
HW DB 'Hello, world!$' uZ?P{E,K
vx9!KWy}
CODESEG 4AJ] qu
MOV AX, @data JX0M3|I=
MOV DS, AX ox&5}&\
MOV DX, OFFSET HW 3%*igpj\)
MOV AH, 09H +@ChZ
INT 21H %"`p&aE:
MOV AX, 4C00H jt}Re,
INT 21H 7.29'
END 7wj2-BWa
4vg3F(
:$D*ab^^P
x86 CPU,GNU/Linux,NASM ZO/e!yju
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). r(r(&NU
;Enter this into "hello.asm" then type: 7 z
;"nasm -f elf hello.asm" 8C{&i5kj\E
;"ld hello.o -o hello" UPH#~D!
;"./hello" .,u>WIUxj
OQumAj
section .data ;data section declaration 5az%yS
msg db 'Hello World!',0AH KSs1EmB
len equ $-msg ;string length rf0Z5.
<)ZQRE@
section .text ;code section declaration |5vcT,A
global _start ;entry point (start of execution) eC5*Q=ai,
_start: mov edx,len ;string length n~629 &
mov ecx,msg ;string start ^/#+0/Bn
mov ebx,1 ;file handle: stdout [ K?
mov eax,4 ;sys_write 9p8ajlYg,
int 80h ;kernel system call "5N4
of
8
;
$rQ
mov ebx,0 ;return value c~U0&V_`j
mov eax,1 ;sys_exit #czInXTTx
int 80h ;kernel system call lfAy$qP"}
|*?N#0s5h
>7BP}5`.;
x86 CPU,Windows,MASM32 =b%f@x_U1
.386 ~m=GS[=
.model flat,stdcall mW{;$@PLF"
option casemap:none
Fbo"Csn_
;Include 文件定义 wKpGJ&
{
include windows.inc a[hF2/*
include user32.inc _YX% M|#
includelib user32.lib XEiVs\) G
include kernel32.inc FJ84'T\~
includelib kernel32.lib ~ n<|f
;数据段 !IOmJpl'
.data )#AYb
szCaption db 'A MessageBox!',0 "1s ]74
szText db 'Hello,world!',0 x[t?hl=:
;代码段 -=lm`X<:
.code +(Y\w^@%H
start: KJFQ)#SW!
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK c&T5C,]
invoke ExitProcess,NULL 2M+RA}dX
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ]MYbx)v)
end start vE9"1M
b#I,Z+0ry
'\{ OQH
AWK HVvm3qu4
BEGIN { print "Hello, world!" } <uIPv
Zsx
`G ":y[Q
\zJ^XpC
BASIC sA6Hk B.
传统版BASIC(例如GWBASIC): ?e-rwaW
SsX$l<t*
10 PRINT "Hello, world!" _,^f,WO~
20 END F-@yH
f #h0O3
或在提示符输入: eQQVfEvS
8GxT!
?"Hello, world!":END 0iSNom}m
ub 2'|CYw
现代版BASIC(例如Quick BASIC): ;7Qe m&
xFUD9TM
Print "Hello, world!" u&p8S#e
Yy
4Was#
以下的语句在Quick BASIC中同样有效: "a(R>PV%
^Whc<>|
? "Hello,world!" jEKa9rt
0(&uH0x
9I 6^-m@:
BCPL "^t7]=q
GET "LIBHDR" 4oF,;o+v\4
36'J9h\
LET START () BE rKPsv*w
$( }c/#WA|b
WRITES ("Hello, world!*N") QPVr:+\B{
$) 8;=?F>]xn
% /zHL?RqJ
yYOV:3!"
Befunge rREev
"!dlrow olleH">v ~(m6dPm$}m
, XXwIp-'
^_@ sUF5Yq:9
.~'q
yD2V
*QW.#y>"j
Brainfuck >ptI!\i}
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Q
m9b:U~
+++++++++++++++.>.+++.------.--------.>+.>. xG~-.
$_
$%L0)5
#euOq
C j5Yli6r?3-
#include <stdio.h> JF&$'
k'$7RjCu
int main(void) lItr*,A]
{ =uwG.,lC
printf("Hello, world!\n"); O'SxTwO
return 0; >y+j!)\
} \mN?5QCcE
p38s&\-kEN
L%9yFg%u
C++ IKp(KlA
#include <iostream> 6w<p1qhW
UL7%6v{'*
int main() ~R|fdD/%
{ AF{o=@
std::cout << "Hello, world!" << std::endl; ,^xsdqpe
return 0; P\c0Q;){h"
} (I`<;
hy"p8j7_
x2i`$iNhmP
C++/CLI etW-gbr
int main() /C<} :R
{ jP@t!=
System::Console::WriteLine("Hello, world!"); Rx<[bohio
} $AFiPH9
e ]>{?Z
RmN\;G?}
C# (C Sharp) "2"*3R<Y
class HelloWorldApp )fZ5.W8UE]
{ JvUHoc$sI
public static void Main() Us9$,(3
{ ,@gDY9Q3r/
System.Console.WriteLine("Hello, world!"); 9.goO|~B~
} OQX ek@~2
} ;+qPV7Z
N~arxe(K
,KibP_<%&P
COBOL \b88=^
IDENTIFICATION DIVISION. QQjMC'
PROGRAM-ID. HELLO-WORLD. .+AO3~Dg
ldoN!J
ENVIRONMENT DIVISION. ~w%Z Bp
=TI|uD6T
DATA DIVISION. .uagD[${
d>4e9M"
PROCEDURE DIVISION. **YNR:#Y
DISPLAY "Hello, world!". RZE:WE;5
STOP RUN. Ah2XwFg?
@p2dXJeR<
=09j1:''<d
Common Lisp p|%Y\!
(format t "Hello world!~%") 7e#|=e
*I!
H"?-&>V-
zT+yZA.L
DOS批处理 :S7yM8b`
@echo off skP_us~
echo "Hello, world!" /C8(cVNZ
W%Zyt:H`
L@R%*-a
Eiffel <