“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。 ,]'?Gd
]64mSB
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》。 )vK
%LmP
h+x"?^
以下是用不同语言写成的Hello World程序的几个例子: 8 JUUK(&Z
Ada B;?"R
with Ada.Text_Io; use Ada.Text_Io; %jY/jp=R
procedure Hello is 1;[\xqJ
begin +t
R6[%
Put_Line ("Hello, world!"); "S43:VH
end Hello; XX,iT~+-
e1X*}OI
V>j6Juh
汇编语言 g`!:7|&,_
,iU ]zN//
x86 CPU,DOS,TASM hp}J_/+4n
MODEL SMALL
M? oK@i
IDEAL .foM>UOY
STACK 100H p
IXBJk
8Z!+1b
DATASEG +'?p $@d
HW DB 'Hello, world!$' vS:%(Y"!<
h@T}WZv
CODESEG tqIz$84G
MOV AX, @data *lg1iP{]
MOV DS, AX Z
xLjh
MOV DX, OFFSET HW m u(HNj
MOV AH, 09H \CL |=8[2
INT 21H #:Di1I9<O7
MOV AX, 4C00H 9/RbfV[)
INT 21H Ay!=Yk^~
END x{C=r dp__
5,'?NEyw
REhXW_x
x86 CPU,GNU/Linux,NASM #"6(Q2|
l
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). E) >~0jv
;Enter this into "hello.asm" then type: _tL*sA>[~)
;"nasm -f elf hello.asm" (
=->rP
;"ld hello.o -o hello" zGu(y@o
;"./hello" cU5x8[2
hZ.Sj~>7`
section .data ;data section declaration /g712\?M4
msg db 'Hello World!',0AH ,qpn4`zE~
len equ $-msg ;string length 7[QU
*1bk
Tn/T:7C
section .text ;code section declaration &TSt/b/+W
global _start ;entry point (start of execution) i)\`"&.j>N
_start: mov edx,len ;string length
"=H7p3
mov ecx,msg ;string start Nc[>CgX"@
mov ebx,1 ;file handle: stdout f!*b8ND^R
mov eax,4 ;sys_write X}_}`wIn
int 80h ;kernel system call `ItMn&P
{Zjnf6d]
mov ebx,0 ;return value
C+,;hj
mov eax,1 ;sys_exit )m"NO/sJ2
int 80h ;kernel system call D*`|MzlQ
t</rvAH E
>ALU}o/
x86 CPU,Windows,MASM32 gCgMmD=AZ
.386 z}s0D]$+x
.model flat,stdcall 57)S"
option casemap:none %]>c4"H
;Include 文件定义 tk<dp7y7
include windows.inc "a-Ex ]
include user32.inc s9~W( Wi
includelib user32.lib vML01SAi
include kernel32.inc [sTr#9Z
includelib kernel32.lib P
5m{}@g
;数据段 ;)5d
wq
.data j.sxyW?3
szCaption db 'A MessageBox!',0 q*Yh_IT.I
szText db 'Hello,world!',0 WcPDPu~/
;代码段 . 3=WE@M
.code "QA#
start: m7^aa@^m
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK y;yXOE_
invoke ExitProcess,NULL G7pj.rQ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CwTx7
^qa
end start h5U@Ys
1SP)`Q
qWGnIPk
AWK IaH8#3+a
BEGIN { print "Hello, world!" } n wToZxHZ~
05LVfgJ'q
3)T'&HKQ
BASIC ?&_ -,\t
传统版BASIC(例如GWBASIC): vJ7I
[Z
rF2`4j&!
10 PRINT "Hello, world!" ^L+*}4Dr
20 END y!6B Gz
pB&3JmgR$)
或在提示符输入: ixw3Z D(>+
(\, <RC\
?"Hello, world!":END 2 #kR1rJP
6,G1:BV{K
现代版BASIC(例如Quick BASIC): &vLz{
!Sy._NE`z
Print "Hello, world!" v98=#k!F
u&/q7EBfP
以下的语句在Quick BASIC中同样有效: lt|\$Iy(
X,IjM&o"Y
? "Hello,world!" #25Z,UU
[!]a'
T#x
T(MS,AyD]
BCPL B&Q\J>l9S
GET "LIBHDR" AMG}'P:
YFv/t=`
LET START () BE S 3Tp__
$( gD3s,<>o
WRITES ("Hello, world!*N") 53J!iNnXT6
$) iE=Yh
!jN}n)FSq
X|q&0W=
Befunge jGl8y!aM
"!dlrow olleH">v "=@b>d6U+
, ]>E*s3h
^_@ ((Ak/ qz
D*6v.`]X
!Y>lAx d
Brainfuck a|SgGtBtT4
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< p~6/+ap
+++++++++++++++.>.+++.------.--------.>+.>. 'A;G[(SYy
<vJPKQ`=:
/vll*}}
C 4sasf94
#include <stdio.h> C8rD54A'M
A-^[4&rb
int main(void) rZ2X$FO@
{ $h`(toTyF
printf("Hello, world!\n"); @wy|l)%
return 0; 7K,Quq.%+
} _*7h1[,{f
L`;p.L
Bs_
v".q578
0B
C++ $}V<Um
#include <iostream> 0]4kR8R3[
<f.* =/]W2
int main() Se<]g$eK?5
{ W^npzgDCo
std::cout << "Hello, world!" << std::endl; 'KB\K)cD=3
return 0; aDmyr_f$
} ~XN--4%Q
g\S@@0T{0
;Pf
|\q
C++/CLI r8g4NsRVtv
int main() BLZ#vJR
{ -1iKeyyA
System::Console::WriteLine("Hello, world!"); /_<`#?5T(
} A'r 3%mC
s7.2EkGl=
R,R[.2Vi
C# (C Sharp) e8g"QDc
class HelloWorldApp j[l6&eX
{ nfpkWyI u{
public static void Main() q9fCoz
{ =sy>_
System.Console.WriteLine("Hello, world!"); OLh`R]Sd
} 6hDK;J J&
} ie|I*;#
(uW/t1
U<,@u,_Ja
COBOL L1=3_fO
IDENTIFICATION DIVISION. D^Ahw"X)
PROGRAM-ID. HELLO-WORLD. \$:KfN>WY
^?PU:eS
ENVIRONMENT DIVISION. 88}+.-3t$
HDQhXw!!hc
DATA DIVISION. 'f&o%5]
xw_VK1
PROCEDURE DIVISION. j
!^Tw.Ty
DISPLAY "Hello, world!". (t&]u7Atr
STOP RUN. xg=}MoX
x,$N!X
HUqG)t*c1
Common Lisp ! |SPOk
(format t "Hello world!~%") jv$Y]nf
X-1<YG
0#(K}9T)
DOS批处理 #qkokV6`
@echo off )E;+C2G
echo "Hello, world!" HQHFD0hv
RC7|@a
z _qy>
Eiffel 9~+A<X]Hd
class HELLO_WORLD &v!=\Fig4
\b{Aj,6,
creation Jf\lnJTyU8
make &qw7BuF
feature vZV+24YWb
make is C${{&$&