“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。 YuuG:Kk
|xC
TX
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》。 E^ti!4{<
[~0q )
以下是用不同语言写成的Hello World程序的几个例子: {N`<e>A]{
Ada <W{0@?y
with Ada.Text_Io; use Ada.Text_Io; _Pm}]Y:_
procedure Hello is z-E4-\a
begin soCHwiE
Put_Line ("Hello, world!"); ZX}"
end Hello; xJ.!Q)[
Tj~#Xc
S :|*wB
汇编语言 )}lV41u
7l
EwQ
x86 CPU,DOS,TASM .DsYR/
MODEL SMALL $S ("-3
IDEAL U Bg_b?k
STACK 100H VAzJclB
|ZzBCL8q
DATASEG 2$UR"P
HW DB 'Hello, world!$' Rb*\A7o|;
4 (gf!U
CODESEG bME3" e{O
MOV AX, @data 00TdX|V`
MOV DS, AX !d)i6W?
MOV DX, OFFSET HW X"GQ^]$O
MOV AH, 09H AXI:h"so
INT 21H "xI[4~'`:
MOV AX, 4C00H (`xnA~BN
INT 21H =hlu,
B y
END &d;$k
3S?+G)qKo
PTqS L]
x86 CPU,GNU/Linux,NASM 1i2w<VG1
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). #{1fb%L{i
;Enter this into "hello.asm" then type: 'kK%sE
;"nasm -f elf hello.asm" WGK::?
;"ld hello.o -o hello" ?8/h3xV;
;"./hello" iHB)wC`u
b>WT-.b0
section .data ;data section declaration 55\mQ|.Jn
msg db 'Hello World!',0AH b5R*]
len equ $-msg ;string length EUqG"h5#A{
]^<~[QK_C
section .text ;code section declaration +Eg# 8/q
global _start ;entry point (start of execution) +3CMfYsr8
_start: mov edx,len ;string length e:<>
Yq+
mov ecx,msg ;string start 3\7$)p+c
mov ebx,1 ;file handle: stdout yL-L2
mov eax,4 ;sys_write w (1a{m?ht
int 80h ;kernel system call O/nS,Ux
PMcyQ2R->
mov ebx,0 ;return value 5c8x:
e@
mov eax,1 ;sys_exit *Y~64FM
int 80h ;kernel system call {'(8<n57
R#M).2::
~O6=dR
x86 CPU,Windows,MASM32 `314.a6S
.386 r.5F^
.model flat,stdcall (WvA9s{/
option casemap:none u!W00;`L
;Include 文件定义 D.?gV_
include windows.inc ;U&VPIX$
include user32.inc +fN0>@s
includelib user32.lib u.6%n.g
include kernel32.inc $P_Y8:
includelib kernel32.lib ZtDpCl_
;数据段 tP-c>|cz
.data M;R>]wP"V
szCaption db 'A MessageBox!',0 R0[Gfq9M=
szText db 'Hello,world!',0 O/Vue
;代码段 4tjRju?
.code &7LfNN`
start: 9tO_hhEQ@
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ,U}8(D~:
invoke ExitProcess,NULL , utFCZW
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> z~qQ@u|
end start _[W=1bGJ
Wj&s5;2a
UuGv= yC^6
AWK S%2qB;uw
BEGIN { print "Hello, world!" } ln5On_Wm
m\yO/9{h1
z5I<,[`
BASIC novZ<?7 5;
传统版BASIC(例如GWBASIC): aH_&=/-Tz
V.J%4&^X
10 PRINT "Hello, world!" eR
CGr?e4
20 END !k:j+h/
0W)_5f&
或在提示符输入: bHCd|4e,2
DWAU8>c+
?"Hello, world!":END 6x 0>E^~
@OpcS>:R
现代版BASIC(例如Quick BASIC): `Oi@7/oT
0:*$i(2
Print "Hello, world!" @cON"(
JsV#:
以下的语句在Quick BASIC中同样有效: +] #>6/2q
ee0J;pP2#
? "Hello,world!" kQ +
=GF+hM/~
-?uwlpm#
BCPL wP%;9y2B
GET "LIBHDR" ;(V=disU/
QO8/?^d
LET START () BE 2.6,c$2tB
$( gI]Vyg<{d
WRITES ("Hello, world!*N") #r1x0s40D
$)
m ]\L1&
*)`:Nm~y
o}T]f(>}
Befunge QwhPN'U
"!dlrow olleH">v X_h+\
7N>
, JOMZ&c^
^_@ _Qv4;a
4AGc2e'u
8)i\d`
Brainfuck o` e~1
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< V#=N?p
+++++++++++++++.>.+++.------.--------.>+.>. pH4i6B*5
dgO2fI
CTwP{[%Pk
C 8w{V[@QLn
#include <stdio.h> rJAY7/u
6)W9/V-W
int main(void) \UXQy{Ex
{ y"2c; *7[{
printf("Hello, world!\n"); -/h$Yb
return 0; s#4
"f
} 7B'0(70
j#-74{Y$
J
I} j!
!
C++ rP*?a~<
#include <iostream> `aCcTs7~]p
pM>.z9
int main() o}[wu:>yk
{ ~ WVrtY Ju
std::cout << "Hello, world!" << std::endl; 0hPm,H*Y]
return 0; [9w8oNg0
} 2hquE_1S[w
d~.#K S
-q-%)f
C++/CLI Z!*Wn`d-k
int main() b+w|3bQa
{ l!GAMK 6o
System::Console::WriteLine("Hello, world!"); U2G\GU1 X
} ,#s}nJ4
oqG
0 @@
J H6\;G6
C# (C Sharp) A6-JV8^
class HelloWorldApp >ztv3^w
{ ,UY],;ib
public static void Main() zV%U4P)Dao
{ lx%<oC+M
System.Console.WriteLine("Hello, world!"); ,KZ_#9[>
} XWK A0
} 9HWtdJ+^C=
s$mcIMqs
\vKMNk;kz
COBOL 94H 6`
IDENTIFICATION DIVISION. qRTy}FU1
PROGRAM-ID. HELLO-WORLD. |',MgA
Dk/;`sXV
ENVIRONMENT DIVISION. ZE4~rq/W
0&Zm3(}
DATA DIVISION. -(~CZ
CmM K\R.
PROCEDURE DIVISION. `ez_
{
DISPLAY "Hello, world!". l,L#y4#
STOP RUN. 5v8_ji#l[
h%pgdix
@99@do|C
Common Lisp jeC3}BL}
(format t "Hello world!~%") L=
hPu#&/
vTN$SgzfCU
GJU84Xn7
DOS批处理 v 6Tz7
@echo off :4/RB%)"
echo "Hello, world!" .XTBy/(0
d XrLeoK
o|$l+TC
Eiffel Beqzw0
class HELLO_WORLD !Mceg
~[t%g9
creation 2{% U\^-
make +,f|Y6L<