“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。
W)j/[
' 71D:%p
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》。 /z5j.TMs
qRB&R$
以下是用不同语言写成的Hello World程序的几个例子: umD .
Ada `[Z?&'CRQ
with Ada.Text_Io; use Ada.Text_Io; oh,Nu_!
procedure Hello is IsnC_"f
begin S@T>u,t'
Put_Line ("Hello, world!"); +gK7`:v4O*
end Hello; dHd{9ftyF
x!LUhX '
<fN?=u+
汇编语言 MhJq~G p
/5zzzaj{
x86 CPU,DOS,TASM kw?RUt0-V
MODEL SMALL X~n Kuo
IDEAL [ub,&j^
STACK 100H YwHnDVV+
.B>|>W O
DATASEG vmW4a3
HW DB 'Hello, world!$' d+"KXt5CV
fZXd<Fg+
CODESEG [=.. #y!U
MOV AX, @data N[r@Y{
MOV DS, AX wk)gxn1A,
MOV DX, OFFSET HW rP#@*{";
MOV AH, 09H Z#^2F8,]
INT 21H &W|'rA'r
MOV AX, 4C00H 21w<8:Vg
INT 21H I"Y?vj9]
END
_khQ
7|"11^q
B/pNM81(
x86 CPU,GNU/Linux,NASM D`,@EW].
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). `(Ei-$
>U&
;Enter this into "hello.asm" then type: 6n;ew l}
;"nasm -f elf hello.asm" N[zI@>x
;"ld hello.o -o hello" 42Ql^ka
;"./hello" qlDLZ.
sm\/wlbE
section .data ;data section declaration }]tSWVb*
msg db 'Hello World!',0AH 0H;dA1
len equ $-msg ;string length =XudL^GF
ITq+Hk
R
section .text ;code section declaration Auv/w}zrr
global _start ;entry point (start of execution) m,]Tl;f
_start: mov edx,len ;string length *)u_m h
mov ecx,msg ;string start @{XN}tWDOp
mov ebx,1 ;file handle: stdout ?CM,k0
mov eax,4 ;sys_write uK): d&]Ux
int 80h ;kernel system call }1Wo#b+
C,jPr )6)
mov ebx,0 ;return value R)G'ILneV
mov eax,1 ;sys_exit 9 Q].cDe[
int 80h ;kernel system call PMkwY{.u
zgVplp
Og-Mnx3
x86 CPU,Windows,MASM32 `4Nc(aUr
.386 `4l>%S8y:
.model flat,stdcall %3"3OOT7
option casemap:none ]FQ4v.7
;Include 文件定义 E2%7 v
include windows.inc H$\?D+xlf
include user32.inc pmHd1 Wub
includelib user32.lib QIo|t!7F
include kernel32.inc h7(twct
includelib kernel32.lib t1IC0'o-
;数据段 2c9@n9Vx3a
.data {zmo7~=
szCaption db 'A MessageBox!',0 ed*=p
l3.
szText db 'Hello,world!',0 f{^n<\Jh
;代码段 (|O;Ci
.code 0qJ 3@d
start: x{Gih1
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK zM[WbB+"m
invoke ExitProcess,NULL |oO0%#1H
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> bu@Pxz%_
end start *GD 1[:
nc@ul')
x-Xb4?{
AWK 6^|bKoN/ f
BEGIN { print "Hello, world!" } "B)DX*-\?
C|z`hNp
VwtGHF'
BASIC ^JYR^X>_
传统版BASIC(例如GWBASIC): t}NxD`8
r]8tl
10 PRINT "Hello, world!" |(y6O5Y.
20 END L\hPw{)
`1pri0!
或在提示符输入: o&I0*~sN
y]cx}9~
?"Hello, world!":END /j3oHi$
vR+(7^Yy
现代版BASIC(例如Quick BASIC): s?OGB}
F"B! r -J
Print "Hello, world!" ?Vt$
r+$ 0u~^
以下的语句在Quick BASIC中同样有效: SHz& o[u
eb.`Q+Gb
? "Hello,world!" :gQc@)jZ(*
kl2]#G(
TpMfk7-
BCPL ?e&CbVc4
GET "LIBHDR" P\SD_8
uiHlaMf
LET START () BE X3a:*1N
$( 1Rl`}7Km
WRITES ("Hello, world!*N") rKi)VVkx_
$) !?Ow"i-lp
7"8HlOHA
jzzVZ%t
Befunge }yB@?
"!dlrow olleH">v !j7b7<wR
, zhYE#hv2
^_@ f_;3|i
%!YsSk,
SOP=
X-6f
Brainfuck }3)$aI_
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<
KJ'MK~g
+++++++++++++++.>.+++.------.--------.>+.>. ~{+J~5!;<H
t7)Y@gRy
S :(1=@
C xx/DD%IZ
#include <stdio.h> |k?,4
Pk
U0)(k}Q)
int main(void) Qy4AuMU2
{ Z/Mp=273
printf("Hello, world!\n"); Za=<euc7
return 0; :Z1_;`>CT
} yd>kJk^~/
rZ0@GA
XUMCz7&j
C++ )%#hpP M^
#include <iostream> a#G7pZX/I}
3OM\R%M
int main() qZ8lU
{ rV2}> k
std::cout << "Hello, world!" << std::endl; n,xK7icYNQ
return 0; Do2y7,jv
} S"N@.n[
Q^0K8>G^
c}rRNS$F
C++/CLI D:.^]o[
int main() -AcQ_dS
{ C"0gAN
System::Console::WriteLine("Hello, world!"); bS0^AVA
}
QouTMS-b
/B}]{bcp$
Fb-NG.Z#
C# (C Sharp) *sL'6"#Cre
class HelloWorldApp +.>O%pNj
{ z!RA=]3h
public static void Main() :()4eK/\
{ wBeOMA
System.Console.WriteLine("Hello, world!"); uOougSBV,
} 45ct*w
} 1X#`NUJ?2
w8@MUz}/#
XtQ3$0{*%
COBOL 6EPC$*Xp!
IDENTIFICATION DIVISION. drb_GT
PROGRAM-ID. HELLO-WORLD. u6 B (f;
Zc%S`zK`7
ENVIRONMENT DIVISION. oD"fRBS+$
PT\5P&2o@
DATA DIVISION. (<8T*Xo
)FU4i N)ei
PROCEDURE DIVISION. R@"N{ [9
DISPLAY "Hello, world!". 7&HP2r
STOP RUN. HjV^6oP
lzxn} TO}
6E_YQbdy
Common Lisp SkPv.H0Id
(format t "Hello world!~%") ODEy2).
*wh'4i}u
y& Dd
DOS批处理 8mCr6$|%
@echo off ybYSz@7
echo "Hello, world!" MTLcLmdO
/Ee0S8!Z!1
2<