“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。 McT\ R{/
hf_R\C(c
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》。 ijvNmn1k
2yl6~(JC+
以下是用不同语言写成的Hello World程序的几个例子: ISpeV
Ada e.h~[^zg
with Ada.Text_Io; use Ada.Text_Io; !(B_EM
procedure Hello is @kwLBAK}@
begin :0nK`$'
Put_Line ("Hello, world!"); Ezi' 2Sc
end Hello; Vn)%C_-]A
jZa25Z00
hA@zoIoe
汇编语言 D35m5+=I
PASuf.U$"
x86 CPU,DOS,TASM l!\1,J:}Z
MODEL SMALL p:Iw%eZ:
IDEAL ,`D/sNP,q
STACK 100H (})]H:W7
~;}\zKQKE
DATASEG j?=V tVP
HW DB 'Hello, world!$' Er`TryN|}
P\.WXe#j
CODESEG A)OdQFet(
MOV AX, @data D._{E*vg
MOV DS, AX 1W*V2`0>
MOV DX, OFFSET HW 0xN!DvCg>.
MOV AH, 09H )i&%cyZw
INT 21H +:}kZDl@ X
MOV AX, 4C00H s jSi;S4
INT 21H Z#CxQ D%\
END \$'R+k-57;
7`Qde!+C
V:(y*tFA
x86 CPU,GNU/Linux,NASM U> W|(Y
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). F@g17 aa
;Enter this into "hello.asm" then type: j(&GVy^;?
;"nasm -f elf hello.asm" Xc{ZN1 4n
;"ld hello.o -o hello" 6j_ 678
;"./hello" b~1iPaIh
B@d1xjp)']
section .data ;data section declaration ?vvG)nW
msg db 'Hello World!',0AH { AFf:[G
len equ $-msg ;string length RZ*<n$#6
Qr<AV:
section .text ;code section declaration )W#T2Z>N1
global _start ;entry point (start of execution) Pv~: gP
_start: mov edx,len ;string length z23#G>I&
mov ecx,msg ;string start \Ps5H5Qk;
mov ebx,1 ;file handle: stdout V5~fMsse
mov eax,4 ;sys_write lbd(j{h>4
int 80h ;kernel system call vlvvi()
N=q#y@ L
mov ebx,0 ;return value [8.-(-/;
mov eax,1 ;sys_exit oI*d/*
int 80h ;kernel system call ,'=hjIel
\Fq1^ 8qa
B&
"RS
x86 CPU,Windows,MASM32 ><cU7 ja[^
.386 #vtN+E
.model flat,stdcall 0JK2%%
option casemap:none
QPX`l0V
;Include 文件定义 @'
d6iYk_
include windows.inc },&h[\N{6
include user32.inc wE?CvL
includelib user32.lib =x1Wii$`
include kernel32.inc )J&|\m(e
includelib kernel32.lib YKY2Cw
;数据段 7_KXD#
.data
f\ 'T_
szCaption db 'A MessageBox!',0 pcnl0o~
szText db 'Hello,world!',0 i *'Z3Z)
;代码段 PYu$1o9+N
.code fCg@FHS&^
start: <*_o0;h|
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 1 =^
invoke ExitProcess,NULL +mLD/gK`
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> C s#w72N
end start _KN:
o10U
\ADLMj`F|
iy}xICt
AWK =DC3a3&%
BEGIN { print "Hello, world!" } D#ZPq,f
AuXs B
l
sr?b
BASIC o,*=$/or
传统版BASIC(例如GWBASIC): </=3g>9Z
8SZK:VE@
10 PRINT "Hello, world!" A?r^V2+j
20 END ?A&%Cwj
{E~Xd
或在提示符输入: xNIGO/uI~
@$c!/
?"Hello, world!":END mf9hFy*<4
g YUTt
现代版BASIC(例如Quick BASIC): N&m_e)E5c
r^5jh1
Print "Hello, world!" {m[Wyb(
j^ nu|
以下的语句在Quick BASIC中同样有效: o0mJy'
hl]S'yr
? "Hello,world!" I .P6l*$
r]T0+ oQ>
G "brT 5:
BCPL kP^*hO!%
GET "LIBHDR" " #v%36U
RG}}Oh="v
LET START () BE 8wmQ4){
$( :c:V%0Yji
WRITES ("Hello, world!*N") ,hvc``j
S8
$) 7&|6KN}c
Ao"C<.gUYP
:tbd,Uo
Befunge c\K<sM{
"!dlrow olleH">v F0.z i>5
, g "*;nHI D
^_@ 4Jykos2
RRzP*A%=
VB"(9O]
Brainfuck P=gJAE5
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< f^e&hyC
+++++++++++++++.>.+++.------.--------.>+.>. kOI
!~Qk
1-o V-K
Nw pS)6<-
C t9` Ed>a
#include <stdio.h> 7 :U8 f:
I`^Y Abnb
int main(void) U=m=1FYaG
{ wOg,SMiq
printf("Hello, world!\n"); p6[ (81
return 0; A[JM4x
} _#pnjo
#pA[k-
#PFO]j!_b
C++ ch })ivFP[
#include <iostream> gtYRV*^q
0( //D;j
int main() BY(
eV!
{ 4ZI_pf
std::cout << "Hello, world!" << std::endl; 1exfCm
return 0; vgThK9{m;
} :Q-F9o
J
P%)b+H{$h
w2zp#;d
C++/CLI Ac\W\=QvB
int main() c0[k T
{ XTo8,'UaP
System::Console::WriteLine("Hello, world!"); k
,fTW^ ?
} N`1r;%5
@O/,a7Tt
R|Y~u* D
C# (C Sharp) "&-C$J5
Id
class HelloWorldApp Pfan7fq+
{ .'lN4x
public static void Main() r\xXU~$9v
{ H[nz]s
System.Console.WriteLine("Hello, world!"); X4Xf2aXI
} .$wLLE^*
} Funj!x'uE
VGZ6
p;`N\.ld
COBOL w1i?#!|
IDENTIFICATION DIVISION. *P xf#X
PROGRAM-ID. HELLO-WORLD. ?v.Gn9Z&
(\vXA4Oa,
ENVIRONMENT DIVISION. !<r8~A3!(
J"&y|;G
DATA DIVISION. {D,RU8&
) b:4uK
A
PROCEDURE DIVISION. `~nCbUUee
DISPLAY "Hello, world!". b n-=fb(
STOP RUN. `bqzg
MaErx\
Jck"Ks
Common Lisp w-FHhf
(format t "Hello world!~%") ?Aw3lH#:
kzi|$Gs<