“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。 Rcs7 'q5
} R!-*Wk
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》。 >DVjO9Kf
u4bPj2N8I
以下是用不同语言写成的Hello World程序的几个例子: ..V6U"/
Ada ]Cnj=\'
with Ada.Text_Io; use Ada.Text_Io; #x$.
procedure Hello is nF0$
begin 8~AO~
Put_Line ("Hello, world!"); $J"}7+
end Hello; "P\k_-a'
Y,I0o{,g
jJdw\`
汇编语言 7].tt
oNY;z-QK
x86 CPU,DOS,TASM \g< M\3f
MODEL SMALL PeEf=3
IDEAL C9`#57 Pp
STACK 100H B;9X{"
s`GwRH<#
DATASEG o7S,W?;=5
HW DB 'Hello, world!$' <^6|ZgR
%>`0hk88
CODESEG <\eHK[_*
MOV AX, @data ^]o]'
MOV DS, AX jv<BGr=4;
MOV DX, OFFSET HW O&!>C7
MOV AH, 09H jjL(=n<J<"
INT 21H +Rn]6}5m\
MOV AX, 4C00H YbB8D-
INT 21H s<Pk[7`*
END ]n1@!qa48
.9{Sr[P
ag^EH"%zw
x86 CPU,GNU/Linux,NASM r7o63]
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). )pLde_ k
;Enter this into "hello.asm" then type: Zc(uK{3W-
;"nasm -f elf hello.asm" wG6>.`:
;"ld hello.o -o hello" _Z z"`
;"./hello" Z12-Vps
Tu95qL~^
section .data ;data section declaration \72(d
msg db 'Hello World!',0AH fvK):eCo
len equ $-msg ;string length bDVz+*bU}
(Em^qN
section .text ;code section declaration uq~$HXdc
global _start ;entry point (start of execution) |S[Gg
_start: mov edx,len ;string length LPX@oh a
mov ecx,msg ;string start {;1Mud
mov ebx,1 ;file handle: stdout *t.L` G
mov eax,4 ;sys_write S]mXfB(mh
int 80h ;kernel system call fBBNP)
7.-Q9xv
mov ebx,0 ;return value ,0O9!^
mov eax,1 ;sys_exit 'AU(WHf
int 80h ;kernel system call Bpt%\LK\~O
Pd9qY
8CP
h'YC!hjp
x86 CPU,Windows,MASM32 :S'P
lH
.386 :5IbOpVM
.model flat,stdcall PrqN5ND
option casemap:none vp7J';
;Include 文件定义 '1{co/Y
include windows.inc *m6~x-x
include user32.inc aF1i!Z
includelib user32.lib !PJD+SrG
include kernel32.inc v
MTWtc!6
includelib kernel32.lib 9gR@Q%b)
;数据段 1eQa54n
.data k2DT+}u7G
szCaption db 'A MessageBox!',0 19O /Q,9
szText db 'Hello,world!',0 MLg+ 9y
;代码段 g>)&Q>}=W
.code q66!xhp;?
start: Bc3(xI'>J
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ?4v&TB@
invoke ExitProcess,NULL Jk=E"I6
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> :E'uV"j%
end start ]FV,}EZ
k)j,~JH
W@U<GF1
AWK E-jL"H*
BEGIN { print "Hello, world!" } V("@z<b|
gFlUMfKh
QII-9RxX"
BASIC O2./?Ye
传统版BASIC(例如GWBASIC): A3D"b9<D
UkK`5p<D7
10 PRINT "Hello, world!" >__t 2
20 END uj#bK
7
7`-f N|
或在提示符输入: l%XuYYQ
AX=$r]_
?"Hello, world!":END {`~uBz+dJq
*9.4AW~]X
现代版BASIC(例如Quick BASIC): x9S~ns+r
GBnf]A,^@
Print "Hello, world!" s/#L?[YH
Zn{,j0;
以下的语句在Quick BASIC中同样有效: yneIY-g(p
T=Q"|S]V
? "Hello,world!" Mg3>/!
2;X{ZLo
eT8(O36%
BCPL &("HH"!
GET "LIBHDR" 5n,?&+*L
USBU?WDt
LET START () BE t* eZe`|
$( rC
)pCC
WRITES ("Hello, world!*N") 2MS-e}mi
$) }!-BZIOlO
V*]cF=W[A
nGb%mlb
Befunge h# R;'9*V
"!dlrow olleH">v W
&wqN
, ^APPWQUl
^_@ \$; Q3t3
;Z:zL^rvn
M.B0)
Brainfuck D|m]]B
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< f Cg"tckE
+++++++++++++++.>.+++.------.--------.>+.>. 8K(3{\J[V
[!Uzw2
vb^/DMhz
C O#[+=
^
#include <stdio.h> G&ZpQ)
+<qmVW^X
int main(void) P]V/<8o.53
{ YT:])[gVV
printf("Hello, world!\n"); 2Lravb3
return 0; e'%"G{(D
} PEA<H0
_19x`J3
j;%RV)e
C++ %&EDh2w>
#include <iostream> )X-~+X91S
Iu(j"b#
int main() t<sy7e='
{ N=4`jy =
std::cout << "Hello, world!" << std::endl; QN!.~>
return 0; 1 /@lZ
} }~/u%vI@M5
Wk3R6
V
(H=7 (
C++/CLI z +NxO!y
int main() 4q%hn3\
{ m3o+iYkMD
System::Console::WriteLine("Hello, world!"); WEX6I16
} M@)^*=0H
[+7 Nu
_Nze="Pt
C# (C Sharp) H|Vq
class HelloWorldApp Hz A+Oi
{ BEU^,r3z
public static void Main() Hzos$1DJ
{ <$m=@@qg
System.Console.WriteLine("Hello, world!"); HI+87f_Q
} c{7<z9U
} DdAs]e|D[
[}p/pj=
e* 2ay1c
COBOL wO\,?SI4
IDENTIFICATION DIVISION. s+mNr3
PROGRAM-ID. HELLO-WORLD. t?bc$,S"\(
y]9PLch]vZ
ENVIRONMENT DIVISION. J2tD).G
^5BLuN6
DATA DIVISION. o*\cV6
'VH%cz*
PROCEDURE DIVISION. |q0MM^%"
DISPLAY "Hello, world!". [):&R1