“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。 J3n-`k8
2^^`n1?'
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》。 X:6c}p%,!
&?q/1vLa
以下是用不同语言写成的Hello World程序的几个例子: *MJX?
Ada _59huC.
with Ada.Text_Io; use Ada.Text_Io; g=QDu7Ux
procedure Hello is
c|M6<}
begin UD8op]>L
Put_Line ("Hello, world!"); xZ6~Ma2z
end Hello; vH#huZA?7
W7U2MqQ
#=6E\&NC
汇编语言 W}5xmz
kL$!E9
x86 CPU,DOS,TASM B?4boF?~
MODEL SMALL xL{a
IDEAL >N]7IU[-
STACK 100H yp$_/p O=2
x n5l0'2
DATASEG /Y'Vh^9/T
HW DB 'Hello, world!$' AQ_|:
73xAG1D$r
CODESEG G*-b}f
MOV AX, @data T;,cN7>>O
MOV DS, AX Cq'KoN%nQ
MOV DX, OFFSET HW SzjkI+-$:
MOV AH, 09H p4'G$]#
INT 21H %@.v2 cT
MOV AX, 4C00H kg'o&^/=
INT 21H {vuZ{IJa
END ;j^H)."A\
cUvz2TK
`-3Ow[
x86 CPU,GNU/Linux,NASM ~y/
nlb!
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). .7l&1C)i
;Enter this into "hello.asm" then type: *g6n
;"nasm -f elf hello.asm" qWODs
;"ld hello.o -o hello" Z@3i$8
;"./hello" ynE)Xdh
kP-3"ACG
section .data ;data section declaration 7PtN?;rP
msg db 'Hello World!',0AH ^R# E:3e
len equ $-msg ;string length I~ok4L?VB
3+ @<lVew6
section .text ;code section declaration tD+9kf2
global _start ;entry point (start of execution) UazP6^{L
_start: mov edx,len ;string length jV4\A
mov ecx,msg ;string start
\4v]7SV
mov ebx,1 ;file handle: stdout yt.F\ [1
mov eax,4 ;sys_write y~F,0"N\r
int 80h ;kernel system call *XT/KxLa7
FQqI<6;
mov ebx,0 ;return value Y*H|?uNF
mov eax,1 ;sys_exit go'-5in(
int 80h ;kernel system call Mdl{}P0)
maXG:l|
;4.!H,d
x86 CPU,Windows,MASM32 4A_[PM
.386 A1.7O
.model flat,stdcall #6+@M
option casemap:none b/C`Jp
;Include 文件定义 ><gG8MH0'
include windows.inc pKit~A,Q
include user32.inc bT^I"
includelib user32.lib %?p1d!
include kernel32.inc ~v6OsH%vx
includelib kernel32.lib 4:r!|PJn{G
;数据段 HbXPok
.data |Z=^`J
szCaption db 'A MessageBox!',0 qI~xlW
szText db 'Hello,world!',0 Tl2C^j
;代码段 XpBj%e:
.code PfC!lI
BU
start: I?ae\X@M
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK %Ti}CwI`
invoke ExitProcess,NULL kPF9Z "l
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (Q.waI
end start T>R0T{A
1T-8K
r
M#As0~y
AWK ]
:BX!<
BEGIN { print "Hello, world!" } sB c
(gr
Q\
U:~g3
iZaI_\"__
BASIC !f&Kf,#b`
传统版BASIC(例如GWBASIC): :=wTvz
}j*KcB_
10 PRINT "Hello, world!" N6 (
20 END (^u1~1E 5
(`sH3&Kl
或在提示符输入: p;tVn{u
mR}6r2O2\Q
?"Hello, world!":END DGAX3N;r6{
c6X}2a'
现代版BASIC(例如Quick BASIC): lzYnw)Pv
6P5Ih
Print "Hello, world!" ?34 e-
Z; A`oKd
以下的语句在Quick BASIC中同样有效: <;#~l*
&!/}Qp
? "Hello,world!" ^(|vsFzn
`"&da#N]
h $L/<3oP6
BCPL ;uwRyd
GET "LIBHDR" ]cGA~d
A7%:05
LET START () BE UG'9*(*
$( XVvK2(
WRITES ("Hello, world!*N") k;w- E
$) .)<(Oj|4
rz@=pR :
-lhLA`6_R
Befunge nIU 6h
"!dlrow olleH">v 1rkE yh??
, B:!W$<
^_@ Z(Bp 0a
~[\_N\rm
jC7&s$>Q"g
Brainfuck IFDZfx
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<
'+$EhFwD
+++++++++++++++.>.+++.------.--------.>+.>. }lfnnK#
dVsE^jsL
$D}{]MN.
C Mi/&f
#include <stdio.h> WnGGo'Z
}jVSlCF@t
int main(void) )e a :Q?
{ (Nx;0"5IX
printf("Hello, world!\n"); h\PHKC2
return 0; J,AR5@)1
} op6CA "w
1. rj'
L(khAmm
C++ l PK
+$f$
#include <iostream> ,=|ZB4HA
+ j W1V}h
int main() w0C~*fn3l
{ unBy&?&p
std::cout << "Hello, world!" << std::endl; *7h!w!LN~
return 0; p\JfFfC
} %5A+V0D0'
mL_j4=ER@
%YSu8G_t
C++/CLI C@bm
int main() o]p|-<I Q
{ |Tm!VFd
System::Console::WriteLine("Hello, world!"); DBT&DS
} ^9ePfF)5
-*m+(7G\
FxVZ[R
C# (C Sharp) kn>$lTHQ
class HelloWorldApp
8`fjF/
{ $`-4Ax4%
public static void Main() =Q[b'*o7
{ Nqrmp" ]
System.Console.WriteLine("Hello, world!"); ~Q>_uw}g#
} hWT[L.>k
} A _XhuQB;d
MHsc+gQiz
TH$N5w%
COBOL E[bd@[N
8
IDENTIFICATION DIVISION. <]b7ZF]
PROGRAM-ID. HELLO-WORLD. =<NljOR4`
*H.oP
ENVIRONMENT DIVISION. yZ7,QsEsN
Hf vTxaK
DATA DIVISION. Ie4 hhW
S}ECW,K
PROCEDURE DIVISION. ]f_6 '|5A
DISPLAY "Hello, world!". 9>g,
STOP RUN. W"k8KODOY
Ce")[<:
6'RrQc=q
Common Lisp gF5a5T,
(format t "Hello world!~%") Tp9-niW
|)K]U
h?FmBK'BAd
DOS批处理 L[20m(6?
@echo off NbGV1q']
echo "Hello, world!" |R#"Th6mH!
n Ml%'[u
nYa*b=[.
Eiffel -atGlu2
class HELLO_WORLD _Jt 2YZdA
hwIMn33
creation j~e;DO
make ]/B$br'O{?
feature ~DsECnD
make is V]vc(rH
local F`9ZH.
io:BASIC_IO jvV9eA:zl
do zKsz*xv6b
!!io v!FMs<
io.put_string("%N Hello, world!") {s_+?<l
end -- make Gsc\/4Wx
end -- class HELLO_WORLD Z+StB15
3:f[gV9K
r@o6voX
Erlang 0`I-2M4F*Q
-module(hello). Iy.rqc/86
-export([hello_world/0]). Z KOXI%~Mc
{vN}<f`
hello_world() -> io:fwrite("Hello, World!\n"). YNBHBK4;
,s_T pq
E gDQ+(
-
Forth H=\!2XS
." Hello, world!" CR )5.C]4jol
L:k9#6
ph#tgLJ
Fortran `)Z!V?&