“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。 OJ?U."Lxm$
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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》。 C:r3z50
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以下是用不同语言写成的Hello World程序的几个例子: 9w!PA-) L
Ada ~`yO@f;D
with Ada.Text_Io; use Ada.Text_Io; T0|hp7WM
procedure Hello is kltorlH
begin ,76Q*p
Put_Line ("Hello, world!"); ^i[bo3
end Hello; ,4mb05w;d
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汇编语言 ;.+C
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x86 CPU,DOS,TASM {iXQUj
MODEL SMALL )6b`1o!7
IDEAL __%){j6
STACK 100H 3;?DKRIcX
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DATASEG l3N '@GO
HW DB 'Hello, world!$' 'r'+$D7
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CODESEG VV-%AS6;
MOV AX, @data HC!5AJ&+}v
MOV DS, AX y/Ui6D
MOV DX, OFFSET HW `gvd8^
MOV AH, 09H 4D)M_O
INT 21H IE:;`e:\D
MOV AX, 4C00H gY {/)"
INT 21H U _sM==~
END O-(gkE
cC pNF `DN
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x86 CPU,GNU/Linux,NASM E3V_qT8
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 'i:S=E
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;Enter this into "hello.asm" then type: f]NaQ!.
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;"nasm -f elf hello.asm" n#PXMD*
;"ld hello.o -o hello" Ug#EAV<m
;"./hello" p'4ZcCW?f
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s9go
section .data ;data section declaration 9}T(m(WQVu
msg db 'Hello World!',0AH }xJ!0<Bs
len equ $-msg ;string length '$h0l-mQ
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section .text ;code section declaration 1VA%xOURh
global _start ;entry point (start of execution) m`&6[[)6~
_start: mov edx,len ;string length RveEA/&&
mov ecx,msg ;string start $C
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mov ebx,1 ;file handle: stdout ef K
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mov eax,4 ;sys_write NQx>u
int 80h ;kernel system call @NYlVk2
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mov ebx,0 ;return value (V>/[Ev
mov eax,1 ;sys_exit x-T7
tr&(
int 80h ;kernel system call nNhb,J
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x86 CPU,Windows,MASM32 :gM_v?sy
.386 Rhzcm`"
.model flat,stdcall Og1Hg
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option casemap:none |@rYh-5
;Include 文件定义 &UQP9wS4v
include windows.inc g$U7bCHG
include user32.inc N&G;`
includelib user32.lib 'XI-x[w
include kernel32.inc 7I0K=
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includelib kernel32.lib RY}:&vWDk
;数据段 m!WDXt
.data 8bX?HeYrr
szCaption db 'A MessageBox!',0 PEMuIYm$
szText db 'Hello,world!',0 Nazr4QU
;代码段 ]t-B-(D
.code DI\^&F)3T2
start: & &:ZY4`
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK `08}y*E
invoke ExitProcess,NULL _]M:
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> }g"K\x:Z
end start G(hzW%P
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BEGIN { print "Hello, world!" } VrKFpFd
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BASIC uDMyO<\
传统版BASIC(例如GWBASIC): m88[(l
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10 PRINT "Hello, world!" S~ZRqL7ZO
20 END w1)SuMFK_
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或在提示符输入: X?SLYm@v
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?"Hello, world!":END -v~XS-F
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现代版BASIC(例如Quick BASIC): }4_c~)9Q
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Print "Hello, world!" 7jPn6uz>w
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以下的语句在Quick BASIC中同样有效: 2(>=@q.1H
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? "Hello,world!" 8]&lUMaqVZ
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1-}$sO c
BCPL 70E@h=oQ
GET "LIBHDR" W C3b_ia
rm!.J0
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LET START () BE 9|2LuHQu+
$( ~c'R7E&Bfa
WRITES ("Hello, world!*N") A[ N>T\
$) F
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Befunge ?sbM= oo
"!dlrow olleH">v KDYyLkI dr
, fqZ+CzH
^_@ C/!8NV1:4
(^= Hq'D
_R;+}1G/
Brainfuck ^jg{MTa
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< etL)T":XV
+++++++++++++++.>.+++.------.--------.>+.>. vA#?\j2
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C hP=z<&zb/
#include <stdio.h> (N$$N:ac[t
{-,^3PI\
int main(void) -0:B2B
{ f2FGod<CzN
printf("Hello, world!\n"); ,E8~^\HV
return 0; BXX1G
} Wg5i#6y8w
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C++ dWhF[q"
#include <iostream> Ujss?::`G
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int main() Vr<ypyC
{ D(gpF85t
std::cout << "Hello, world!" << std::endl; O:(%m
return 0; nwAx47>{
} 8Zvh"Z?
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C++/CLI IP+1 :M
int main() 1@A*Jj[R%
{ 4r>buEU
System::Console::WriteLine("Hello, world!"); ?u8vK<2h
} m&Lc."
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C# (C Sharp) X5eTj
class HelloWorldApp }lt]]094,
{ &_y+hV{
public static void Main() %]@K}!)2
{ N0G-/
System.Console.WriteLine("Hello, world!"); z/t:gc.
} ;t}ux
} 7<%Rx19L*
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COBOL 7&9'=G
IDENTIFICATION DIVISION. A[m4do
PROGRAM-ID. HELLO-WORLD. D^H<)5d9
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ENVIRONMENT DIVISION. Rd.[8#7VE
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DATA DIVISION. g_w4}!|
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PROCEDURE DIVISION. J#y?^Qm$)<
DISPLAY "Hello, world!". ps6c>AN`A&
STOP RUN. "Z6: d"S`
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Common Lisp SAGLLk07G
(format t "Hello world!~%") 8M;G@ Q80
_[W`!#"
0\y@etb:mf
DOS批处理 3fJwj}wL
@echo off E5 0$y:
echo "Hello, world!" |79!exVMBp
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Eiffel (FAd'$lhX}
class HELLO_WORLD {1
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x 1"ikp}
creation {G%!M+n<
make ')w*c
feature L%.GKANM
make is l@om2|B
local y]`@%V2P
io:BASIC_IO &xqr&(o
do 8_tMiIE-pS
!!io s/K}]F
io.put_string("%N Hello, world!") -ijQTB
end -- make Th%1eLQ
end -- class HELLO_WORLD Tl3{)(ezx
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Erlang 8EPV\M1%
-module(hello).
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-export([hello_world/0]). %?EOD=e=
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hello_world() -> io:fwrite("Hello, World!\n"). e+F5FAMR68
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Forth FBcF
." Hello, world!" CR Zh.fv-Ecp
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Fortran ?fEX&t,'
WRITE(*,10) 2eu`X2IBcT
10 FORMAT('Hello, World!') ${ ~UA6
STOP 8E Y<^:
END 5 b[:B~J
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