“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。 :fJN->wY^s
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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》。 ]K%!@O!
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以下是用不同语言写成的Hello World程序的几个例子: 'we>q@
Ada #|``ca54B
with Ada.Text_Io; use Ada.Text_Io; Z #m+ObHK1
procedure Hello is .o}v#W+st
begin wS3'?PRX
Put_Line ("Hello, world!"); a09<!0Rp
end Hello; y~HP>~Oh
#Rr%:\*
`wU!`\
汇编语言 q75s#[<ap
Yoll?_k+
x86 CPU,DOS,TASM x$(f7?s] 1
MODEL SMALL 8a"%0d#
IDEAL xe$_aBU
STACK 100H ft
Wv~Eh
EB|}fz
DATASEG S5EK~#-L[
HW DB 'Hello, world!$' ?Ss!e$jf
]J]h#ZHx
CODESEG PmM3]xVzd
MOV AX, @data 2b8L\$1q
MOV DS, AX QSf|nNT
MOV DX, OFFSET HW +qdEq_m
MOV AH, 09H 3T0"" !Q
INT 21H f|oh.z_R
MOV AX, 4C00H t.C5+^+%
INT 21H <
FAheE+
END {+ b7sA3
p{dj~ &v
Mrb)
x86 CPU,GNU/Linux,NASM W=4FFl[
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). m~ee/&T
;Enter this into "hello.asm" then type: a"u0Q5J
;"nasm -f elf hello.asm" 3HK\BS
;"ld hello.o -o hello" ,9
a
;"./hello" YKf0dh;O
f6"Z'{j
section .data ;data section declaration MnW+25=N
msg db 'Hello World!',0AH -`6+UkOV[x
len equ $-msg ;string length *}W_+qo"
bi;1s'Y<D
section .text ;code section declaration "tpSg
global _start ;entry point (start of execution) ht}wEvv
_start: mov edx,len ;string length ?!/kZM_ts
mov ecx,msg ;string start 1[-tD0{H
mov ebx,1 ;file handle: stdout IV)j1
mov eax,4 ;sys_write zT-_5uZQ
int 80h ;kernel system call y1L,0 ]
ENY+^7
mov ebx,0 ;return value |]*/R^1>2
mov eax,1 ;sys_exit "U"Z 3*
int 80h ;kernel system call uWE^hz"
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)whA<lC
x86 CPU,Windows,MASM32 <1M-Ro?5k
.386 Ozf@6\/t
.model flat,stdcall Kx JqbLUC
option casemap:none b>JDH1)
;Include 文件定义 7. ;3e@s
include windows.inc D.XvG _
include user32.inc |LKXOU
c
includelib user32.lib 7Hu3>4<
include kernel32.inc Nda *L|
includelib kernel32.lib r]36zX v
;数据段 m`r(p"
.data JqiP>4Uwm^
szCaption db 'A MessageBox!',0 v|2T%y_
u
szText db 'Hello,world!',0 )53y
AyP
;代码段 >[*qf9$
.code 4+ Z]3oIRE
start: h 9W^[6
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 7D5]G-}x.
invoke ExitProcess,NULL #Mw8^FST
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> b;UJ 88
end start Q]>.b%s[
N] sAji*
icK/],
AWK u;c?d!E
BEGIN { print "Hello, world!" } a:6m7U)P#5
d6 5L!4
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BASIC }vM("v|M
传统版BASIC(例如GWBASIC): ')3
bl3:
IO-Ow!
10 PRINT "Hello, world!" }`~+]9<
20 END 0"bcdG<}
?5
7Sk+
或在提示符输入: g}',(tPMZ
'."ed%=MC
?"Hello, world!":END CzEd8jeh7
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现代版BASIC(例如Quick BASIC): [IhYh<i
]?[fsdAQW
Print "Hello, world!" BF{Y"8u$
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以下的语句在Quick BASIC中同样有效: RrQJ/ts7}
!Q0w\j h
? "Hello,world!" s!7y
,DkNLE
W:L
AP
R
BCPL #O dJ"1A|
GET "LIBHDR" 6V01F8&w
SI-Ops~e
LET START () BE .OY`Z)SS%
$( AkQ~k0i}b
WRITES ("Hello, world!*N") pcWPH.
$) j#q-^h3H
@2 fg~2M1
03 #lX(MB
Befunge G*P#]eO
"!dlrow olleH">v ]3.;PWa:
, V[Ui/M!9Z
^_@ Z}Ft:7
%Y*Ndt 4
]-/VHh
Brainfuck }Ud*TOo `
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< L0WN\|D
+++++++++++++++.>.+++.------.--------.>+.>. rCdu0 gYT
2!=f hN
E#N|wq
C ;@Y;g(bw:
#include <stdio.h> %/ #NK1&M
q'Tf,a
int main(void) J]pir4&j
{ +OWX'~fd<
printf("Hello, world!\n"); )
ahA[
return 0; .jjG(L
} 6zuTQ^pz
t=W}SH
JO6)-U$7UG
C++ ]K,Tnyp
#include <iostream> U>}w2bZ*
9N3o-=
int main() :(*V?WI
{ )cMh0SGcM1
std::cout << "Hello, world!" << std::endl; =R$u[~Xl2X
return 0; :emiQ
} OU
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<&g,Nc'5C
N)\. [v
C++/CLI 0rs"o-s<
int main() l L@XM2"
{ Sp]0c[37R
System::Console::WriteLine("Hello, world!"); $1L>)S
} o~y;j75{.*
L2i_X@/
4*cEag
C# (C Sharp) =|y9UlsD
class HelloWorldApp `%"\@<
{ j@3Q;F0ba
public static void Main() ShP^A"Do
{ ~H<6gN<j(.
System.Console.WriteLine("Hello, world!"); tGE$z]1c@
} aP@N)"
} >rmqBDKaQ
q01wbO3-"
Nkth>7*
COBOL %axh`xK#
IDENTIFICATION DIVISION. C]`$AqKl
PROGRAM-ID. HELLO-WORLD. 0{p#j~ZhC
u?<%q!
ENVIRONMENT DIVISION. :g=qz~2Xk
6@F9G4<Z
DATA DIVISION. ;)z:fToh
Em
!/a$
PROCEDURE DIVISION. BLf>_bUk
DISPLAY "Hello, world!". S3*`jF>q
STOP RUN. J7Hl\Q[D1
rCbDu&k]
`*cxH..
Common Lisp ub#a`
(format t "Hello world!~%") oC: {aK6\
/1V xc 6
yT"Eq"7/Y#
DOS批处理 c&?m>2^6
@echo off p\tm:QWD;
echo "Hello, world!" "W7K"=X
GxI!{oi2
%G/hD
Eiffel O1U= X:Zl
class HELLO_WORLD 4I
k{
rv^@, 8vq
creation z2_*%S@
make *ebSq)
feature WwBOM~/`2
make is *K6g\f]b #
local Vvn2 Ep
io:BASIC_IO %Ycy{`
do Hz1%x
!!io FxtQXu-g
io.put_string("%N Hello, world!") ?FeYN+qR
end -- make fF$<7O)+]
end -- class HELLO_WORLD jrlVvzZ
\K{0L
'EEJU/"u
Erlang Ic"ybj`
-module(hello). :0j?oY~e
-export([hello_world/0]). X<`
hl7bzKO*w
hello_world() -> io:fwrite("Hello, World!\n"). i&Tbz!
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