“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。 >J1o@0tk
TH-^tw
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》。 RfD$@q9
iu .{L(m
以下是用不同语言写成的Hello World程序的几个例子: E:ytdaiT
Ada ~Y(M>u.+!
with Ada.Text_Io; use Ada.Text_Io; Dcf`+?3
procedure Hello is f
W )
begin zV]0S o
Put_Line ("Hello, world!"); +J} 41
end Hello; Smp+}-3O
-:QyWw/d
19EU[eb
汇编语言 U7W ct %
W[jxfZD9v
x86 CPU,DOS,TASM ocMf}"
MODEL SMALL U6Qeode
IDEAL VXa]L4jJ9
STACK 100H 8Xr3q eh+
d3\8BKp
DATASEG #%5>}$
HW DB 'Hello, world!$' 3Rm$
xfzR>NU
CODESEG _C4^J
MOV AX, @data La!PGZ{
MOV DS, AX bMZ0%(q
MOV DX, OFFSET HW ms$o,[
MOV AH, 09H kU /?#s
INT 21H 5IepVS(>?v
MOV AX, 4C00H lbPxZ'YO#
INT 21H %bsdC0xM
END _FV.}%W<u
5*CwQJC<
IkvH8E
x86 CPU,GNU/Linux,NASM yD KX,
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). C"sa.#}
;Enter this into "hello.asm" then type: Zwcb5\Q
;"nasm -f elf hello.asm" " n\!y~:
;"ld hello.o -o hello" t!k 0n&P
;"./hello" B[$e;h*Aw[
5Ql6?UHD
section .data ;data section declaration pxN'E;P-
msg db 'Hello World!',0AH 4
qnQF]4
len equ $-msg ;string length F,D&
Eg9502Bl~8
section .text ;code section declaration lyV]-w
global _start ;entry point (start of execution) Mk?9`?g.
_start: mov edx,len ;string length ex['{|a{
mov ecx,msg ;string start pp:+SoyN
mov ebx,1 ;file handle: stdout (*EN! -/
mov eax,4 ;sys_write B<)(7GTv7"
int 80h ;kernel system call <Z5prunov
LKm5U6
mov ebx,0 ;return value e0qa~5
mov eax,1 ;sys_exit YP6+o#==
int 80h ;kernel system call Pk,^q8;
;R67a
V,
>!$4nxq2>
x86 CPU,Windows,MASM32 qj|GAGrQ2
.386 aCMcu\rd
.model flat,stdcall
i"b*U5k
option casemap:none K+7xjFoDIR
;Include 文件定义 ^8 z*f&g
include windows.inc Y}Ov`ZM!r
include user32.inc E>ev /6ox
includelib user32.lib Kq1sGk
include kernel32.inc |X sW)/
includelib kernel32.lib > ):b AfI
;数据段 ZpZ~[BtQ
.data sC#Ixq'ls7
szCaption db 'A MessageBox!',0 :\>UZ9h #
szText db 'Hello,world!',0 0t9G$23
;代码段 A_g'9
.code )TWf/Lcp
start: BG|Kw)z*KM
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 4Qw!YI#40$
invoke ExitProcess,NULL \&cVcAg
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> H'Po
end start 41:Z8YL(
7#RW4ZM
j/W#=\xz
AWK KL xg
BEGIN { print "Hello, world!" } lmod8B
A*$vk2VWw
/qz(ra
BASIC CocvEoE*z
传统版BASIC(例如GWBASIC): y_'8m9Qy)
6L4B$'&KQZ
10 PRINT "Hello, world!" ?6[>HX;
20 END
R)H@'X
X4o8
或在提示符输入: :gR`rc!
#3qkG)
?"Hello, world!":END UgUW4x'+
osnDW
aN
现代版BASIC(例如Quick BASIC): ch-GmAj
9
;mMn-+ 3<
Print "Hello, world!" `W-:@?PmQx
wwF 20
以下的语句在Quick BASIC中同样有效: *d%m.:)N
Hv%a\WNS1
? "Hello,world!" EswM#D9(4
b)df V=
2Aff3]-:Gd
BCPL KLoHjBq
GET "LIBHDR" 7`P(LQAr!
amPQU
LET START () BE \Oc3rJ(
$( SQEXC*08
WRITES ("Hello, world!*N") #$A6s~`B
$) mxXQBmW
JiRW|+`pe
&^z~wJ,]
Befunge ]ao]?=q C
"!dlrow olleH">v rMI:zFS
, haY.rH]z
^_@ j|
257D
Q:%gJ6pa
ny#7iz/
Brainfuck 6~}=? sX4
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< KC
+++++++++++++++.>.+++.------.--------.>+.>. inp= -
>SccoI
NjMo"1d
C 1N2:4|woe
#include <stdio.h> Rk"_4zJk
m+1MoeR
int main(void) R(Z2DEt</
{ {At1]>
printf("Hello, world!\n"); z<)?8tAgq
return 0; ==c\* o
} b`1P%OjC
|JrG?:n
4Jht{#IIG
C++ 4,uH 4[7
#include <iostream> zaX30e:R
<~f/T]E,
int main() uI+h9j$vS
{ Rg'1 F
std::cout << "Hello, world!" << std::endl; ,u!c|4
return 0; F%L^k.y$
} W4T>@b.
='YR;
sgFpZk
C++/CLI F!N;4J5u
int main() 8r+R~{
{ aQkgkV;~
System::Console::WriteLine("Hello, world!"); :h?Zg(l
} _G[5S-0 [
(%\N-[yZ
WCU[]A
C# (C Sharp) YS/{q~$t
class HelloWorldApp 4km=KOx[
{ G^oBu^bq~
public static void Main() _ 4pBJOJQ6
{
S+_}=25
System.Console.WriteLine("Hello, world!"); 6?z&G6
} _! \X>rfz
} ;PGC9v%i
s+^YGB
Cd]d[{NJ;
COBOL Hz!+g'R!Gs
IDENTIFICATION DIVISION. sl>4O]N
PROGRAM-ID. HELLO-WORLD. ,.G6c=pZ
eQJLyeR+
ENVIRONMENT DIVISION. r(0I>|u
8K7zh.E
DATA DIVISION. <HI5xB_
,RDxu7iT
PROCEDURE DIVISION. 0}-&v+
DISPLAY "Hello, world!". d8/lEmv[
STOP RUN. \snbU'lfP
5fSDdaO
ok2$ p
Common Lisp !JJCG
(format t "Hello world!~%") x]J{EA{+
u3w `(3{<
;F"W6G
DOS批处理 .0r5=
@echo off V! a|rTU6
echo "Hello, world!" wnN@aO6g*
mRxL%!
I?Hj,lN
Eiffel /<Zy-+3
class HELLO_WORLD YLJH?=2@
Yk6fr~b
creation [p_R?2uT
make m%'9z L c
feature I^ppEgYSY
make is *.~hn5Y|?
local ]nEN3RJ
io:BASIC_IO m{I_E
G
do {M$mrmG
!!io 76
#
io.put_string("%N Hello, world!") k;#$Oxa>t=
end -- make gjk=`lU
end -- class HELLO_WORLD ^4`q%_vm
=3^YKI
!c\s)&U7B
Erlang x{&0:|bCs6
-module(hello). )U`H7\*)
-export([hello_world/0]). %]nLCoQh
uZW
? 0W
hello_world() -> io:fwrite("Hello, World!\n"). 6JSa:Q>,
\"<&8
bv)E>%Yy
Forth W#8qhmt
." Hello, world!" CR o.Mb~8Yu
rPZ<
D-8%lGS
Fortran =5+M]y
E<