“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。 </|IgN$w`
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 _*+ 7*vAL
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以下是用不同语言写成的Hello World程序的几个例子: Qe=!'u.nL
Ada Z!m0nx
with Ada.Text_Io; use Ada.Text_Io; [=-?n6
procedure Hello is ~fE@]~f>
begin CC>]Gc7
Put_Line ("Hello, world!"); wg*2mo
end Hello; 5dS5,
: \w\K:
Qd 1Q~PBla
汇编语言 ]dc^@}1bN
A\_cGM2
x86 CPU,DOS,TASM q7C>A`w
MODEL SMALL XU .FLNe
IDEAL t+5JIQY>
STACK 100H RJ1Q.o
-1~bWRYq
DATASEG Qj?FUxw
HW DB 'Hello, world!$' $z]gy]F
g#;w)- Zj
CODESEG l-"$a8jn2
MOV AX, @data mV}
peb
MOV DS, AX Q9Wa@gi|
MOV DX, OFFSET HW /v
E >*x
MOV AH, 09H VAF+\Cea=
INT 21H ~&=-*
MOV AX, 4C00H }N1Z7G
INT 21H T2
0dZ8{y
END ]C-hl}iq
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hp!UW
x86 CPU,GNU/Linux,NASM )W~w72j-
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). # &o3[.)9
;Enter this into "hello.asm" then type: !L+*.k:
;"nasm -f elf hello.asm" |Z<NM#1
;"ld hello.o -o hello" `(?E-~#'
;"./hello" !12W(4S5
H~1*`m
section .data ;data section declaration 2Tt@2h_L
msg db 'Hello World!',0AH Bhl@\Kq
len equ $-msg ;string length o-B9r+N
IDb|J%e^P
section .text ;code section declaration ,YJ\
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global _start ;entry point (start of execution) &+=A;Y)
_start: mov edx,len ;string length EUU9JnQhBJ
mov ecx,msg ;string start C+$dm)M/q
mov ebx,1 ;file handle: stdout PBb@J'b
mov eax,4 ;sys_write >n)N=Zyu
int 80h ;kernel system call J.mEOo!>
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mov ebx,0 ;return value K.n #;|
mov eax,1 ;sys_exit L{;q ^
int 80h ;kernel system call 7M<Ae
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Sb+pB58&N
x86 CPU,Windows,MASM32 <*~vZT i(
.386 Qi#%&Jz>f
.model flat,stdcall Z16G
option casemap:none R 28v5
;Include 文件定义 s!``OyI/Z
include windows.inc 0Np}O=>
include user32.inc EX7cjQsml
includelib user32.lib i=@.u=:
include kernel32.inc B5aFt ;Vj
includelib kernel32.lib 8'_>A5L/C
;数据段 >Qz#;HI
.data $ckX H,l_
szCaption db 'A MessageBox!',0 1g5%Gr/0$5
szText db 'Hello,world!',0 'H<?K
;代码段 i2A>T/?{
.code 9~bje^M
start: 0~Ot
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK [s"3g\L';
invoke ExitProcess,NULL s={AdQ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> hgX@?WWR
end start @dV'v{:,
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AWK wP- pFc
BEGIN { print "Hello, world!" } 8MGtJ'.
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hWwh`Vw%
BASIC 1+v&SU
传统版BASIC(例如GWBASIC): C2Fklp6
p#)u2^
10 PRINT "Hello, world!" V|ax(tHv
20 END _ro^<V$%
8Br*
或在提示符输入: (m4`l_
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?"Hello, world!":END YA O,
rh
Wo2TU!
现代版BASIC(例如Quick BASIC): 8i=J(5=
,5HQHo@
Print "Hello, world!" B1oi]hDy
:XEP:8
以下的语句在Quick BASIC中同样有效: q
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c_<m8b{AEF
? "Hello,world!" X"YH49?
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wDU
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BCPL kG/:fP
GET "LIBHDR" ifl`QZp_
t6BggO"_u
LET START () BE lcHwKd
$( rlmzbIuI9
WRITES ("Hello, world!*N") R<@s]xX_
$) M5s>;q)
j|TcmZGO
I4:4)V?
Befunge {v+,U}
"!dlrow olleH">v \:-#,( .V
, ^&buX_nlO
^_@ ,y>,?6:>
}&Un8Rg"h
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Brainfuck j+"i$ln+s
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ^EWkJW,Yc
+++++++++++++++.>.+++.------.--------.>+.>. \:9dt8(-U
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9{@[l!]W
C zD:"O4ZM^^
#include <stdio.h> O-y/K2MC*
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int main(void) Mh"DPt9@J
{ %yX?4T;b
printf("Hello, world!\n"); 2jV.\C k
return 0; losm<
} 56t9h/y
6z=h0,Y}
c[J(H,mt/
C++ A}pmr
#include <iostream> ggtGecKm
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int main() : kz*.1
{ _^;+_6&[
std::cout << "Hello, world!" << std::endl; GOuBNaU{
return 0; U>?q|(u
} }kzGuNj
a~E@scD
Qn'Do4Le
C++/CLI )Kkw$aQI"d
int main() Dn~r~aR$g
{ G66sPw
System::Console::WriteLine("Hello, world!"); 8+Sa$R
} {q
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~sj'GEhEg
`!WtKqr%B
C# (C Sharp) ?,uTH
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class HelloWorldApp _L
5<
{ a,g3/
public static void Main() u U Xj
{ Tlc3l}B*Z
System.Console.WriteLine("Hello, world!"); &<hDl<E
} TP7'tb
} q-kMqnQ
Syv[[Ek
"~- H]9
COBOL QP/%+[E.
IDENTIFICATION DIVISION. jej|B#?`
PROGRAM-ID. HELLO-WORLD. `2N&{(
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ENVIRONMENT DIVISION. 8w1TX [b
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DATA DIVISION. zY_xJ"/9
"c5C0 pK0
PROCEDURE DIVISION. bW03m_<M<1
DISPLAY "Hello, world!". ,{DZvif
STOP RUN. XJJdCv^
ms9zp?M
!_EL{ /ko
Common Lisp -7jP'l=h
(format t "Hello world!~%") J|4q9$
n.9k<
vC$Q4>m
DOS批处理
MO}J
@echo off v`&
echo "Hello, world!" qZw4"&,j$
u\LG_/UJV1
:sO^b*e /
Eiffel &q~**^;'
class HELLO_WORLD }#0MJ6L
Ip c2Qsa
creation S%+,:kq
make nADt8
feature ~q0g7?}&
make is !;Hi9,<#7g
local &"X6s%ZH|
io:BASIC_IO vwy10PlqL
do UrAg*v!Qy
!!io .gY}}Q
io.put_string("%N Hello, world!") 6x18g(KbP
end -- make P$l-p'U-
end -- class HELLO_WORLD yLv jfP1
o=/Cje
Twqkd8[
Erlang 9J>b6
-module(hello). (EZ34,k'S
-export([hello_world/0]). &qR1fbw"
]LGp3)T-
hello_world() -> io:fwrite("Hello, World!\n"). 85;hs
Q
I!c= :u
-anLp8G*
Forth BPf;!.
." Hello, world!" CR Y)D~@|D,
6AS'MD%&
?l\1n,!:8
Fortran $E=t6WvA
WRITE(*,10) P
"S=RX#+
10 FORMAT('Hello, World!') x0t&hY