“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。 N!<X%Ym
@]L$eOV_
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 O6ltGtF
+pe\9F
以下是用不同语言写成的Hello World程序的几个例子: ? 3oUkGfn
Ada J)sOne
with Ada.Text_Io; use Ada.Text_Io; 79B+8= K
procedure Hello is .e\PCf9v
begin lDVgW}o@
Put_Line ("Hello, world!"); ,My'_"S?
end Hello; CKX3t:HP0
[K1z/ea)V
j{@li1W@
汇编语言 0>
QqsQ
9{%/I
x86 CPU,DOS,TASM [-^xw1:
MODEL SMALL =-avzuy#
IDEAL O7p=|F"
STACK 100H oo1h"[
QN#tj$x
DATASEG K14v6d
HW DB 'Hello, world!$' +9M";'\c
\b#`Ahf`
CODESEG Th4}$)yrkN
MOV AX, @data 7?8+h
MOV DS, AX Ym2Ac>I4
MOV DX, OFFSET HW )Jh:~9L%='
MOV AH, 09H tO3#kV\,
INT 21H IV%Rph>d
MOV AX, 4C00H cDz^jC
INT 21H C1OiM b(:
END c=re(
+ijxv
\
*A!@T
x86 CPU,GNU/Linux,NASM T%E/k#
)q
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 9Z DbZc
;Enter this into "hello.asm" then type: [}5mi?v
;"nasm -f elf hello.asm" -X-sykDm
;"ld hello.o -o hello" J^zB5W,)
;"./hello" M]xfH *
{uxTgX
section .data ;data section declaration I(j$^DA.
msg db 'Hello World!',0AH >|mZu)HIY;
len equ $-msg ;string length <(1[n
pS&+
(Mw+SM3<
section .text ;code section declaration w,t !<i
global _start ;entry point (start of execution) gO/\Yi
_start: mov edx,len ;string length QE721y
mov ecx,msg ;string start uW4.Q_O!H
mov ebx,1 ;file handle: stdout 0XI6gPo%
mov eax,4 ;sys_write K*M1$@5
int 80h ;kernel system call UDPn4q
h r6?9RJY
mov ebx,0 ;return value W*2P+H%
mov eax,1 ;sys_exit "YVr/u
int 80h ;kernel system call 4r#4h4`y|
"i&9RA!1
TV/ EC#48
x86 CPU,Windows,MASM32 BC#O.93`
.386 (~fv;}}v
.model flat,stdcall 4ZkaH(a1
option casemap:none Xm<|m#
;Include 文件定义 i"mQ
include windows.inc sAnb
include user32.inc }(K1=cEaL
includelib user32.lib &d]@$4u$;
include kernel32.inc wJu9.
includelib kernel32.lib |Z8Eu0RSb
;数据段 (IIZ vCek
.data &g]s@S|%
szCaption db 'A MessageBox!',0 =&m;5R
szText db 'Hello,world!',0 [EK@f,iM
;代码段 ER;\Aes*?
.code @Thrizh
start: Q'YakEv >=
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK r(rT.D&
invoke ExitProcess,NULL BE!l{
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> SeLFubs_
end start *a-KQw
%q6I-
#$l:%
AWK >` u8(
BEGIN { print "Hello, world!" } X2{Aa T*M
)[ejb?{d
)"_&CYnd
BASIC >u]9(o7I
传统版BASIC(例如GWBASIC): t+M'05-U2
;O~%y'
10 PRINT "Hello, world!" @?gRWH;Pq
20 END b"Jr_24t3v
QQD7NN>
或在提示符输入: &AVX03P
i?,\>LTG
?"Hello, world!":END Z6&bUZF$bE
cH707?p/I
现代版BASIC(例如Quick BASIC): O^_CqT%
j} w
Print "Hello, world!" [MD"JW?4B
AqHGBH0
以下的语句在Quick BASIC中同样有效: EAz>`~
<YrsS-9
? "Hello,world!" PJ,G_+b!
(-VH=,Md
f`8?]@y{
BCPL B;nIKZ
GET "LIBHDR" 3,J{!
V;gC[7H
LET START () BE +jO#?J
$( bGK-?BE5+A
WRITES ("Hello, world!*N") WkV0,_(P
$) ft~QVe!
'r1X6?dJ
RFq=`/>dG
Befunge X.ZG-TC
"!dlrow olleH">v Ml/K~H
tN
, r4 qs!(
^_@ Z_>:p^id
=F_j})O5
Ox@$ }
Brainfuck !E,|EdIr
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< \\{78WDA
+++++++++++++++.>.+++.------.--------.>+.>. w}8=sw
l9n$cv^
09i77
C Vddod
#include <stdio.h> 8C*xrg#g:
sXYXBX[
int main(void) yM7FR);
{ "]q0|ZdOwH
printf("Hello, world!\n"); UG]x CkDS
return 0; uWi pjxS
} YoZd,} i
C~PP}|<~V
%&J`mq
C++ ry+|gCZ
#include <iostream> _>^Y0C[?5
BM5)SgK
int main() \w-3Spk*
{ oG-Eac,
std::cout << "Hello, world!" << std::endl; bNHsjx@
return 0; TQOJN
} 2} _^~8
HUbXJsSP
M7#CMLy
C++/CLI aM:tg1g
int main() e}s,WC2-
{ M&e=LV
System::Console::WriteLine("Hello, world!"); 21] K7
} pP%+@;
g_eR&kuh
?P}) Qa
C# (C Sharp) X>Z83qV5d!
class HelloWorldApp IvI;Q0E-3
{ Z/:W.*u
public static void Main() $4kbOqn4
{ ^P`I"T
d
System.Console.WriteLine("Hello, world!"); !:~C/B{
} QaXdO=3
} [=:4^S|M
Xd.y or
COd~H
COBOL wkp$/IZKMj
IDENTIFICATION DIVISION. ES#q/yab5
PROGRAM-ID. HELLO-WORLD. r MJ4w['J=
Ifq|MZ\
ENVIRONMENT DIVISION. ~se
;L
1yeD-M"w
DATA DIVISION. Djf~8q V!
Z*(OcQ-
PROCEDURE DIVISION. bNoZ{ 7
DISPLAY "Hello, world!". gL1r"&^L
STOP RUN. QwuSo{G
Ko
"JH=<
5U*${
Common Lisp C*Qx
(format t "Hello world!~%") McN'J.Sxp
i6i;{\tc
v'Up& /(
DOS批处理 z[JM ]Wy
@echo off <!X]$kvG
echo "Hello, world!" V3axwg_
@Q:?,
S Z &[o&H
Eiffel Rb
<{o8
class HELLO_WORLD , _ xJ9_
k;.<DN
creation UYpln[S
make j92+kq>Xd
feature 3 >^B%qg6
make is {s?hXB
local HBw0N?
io:BASIC_IO }~#qDrK
do 7/\SN04l
!!io / $'M
io.put_string("%N Hello, world!") ])WIw'L!
end -- make 2 xi@5;!
end -- class HELLO_WORLD W#^p%?8pR
5=!aq\
5
`$/M\aM%
Erlang u;8bbv4
-module(hello). U*T :p>&
-export([hello_world/0]). x/ P\qI
D.h <!?E%
hello_world() -> io:fwrite("Hello, World!\n"). ]`}EOS-Q
sB01QVx47
QFhQfn
Forth x6|QTO
." Hello, world!" CR be.Kx< I
|^GN<