“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。 (B@X[~
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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》。 S@x}QQ|.
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以下是用不同语言写成的Hello World程序的几个例子: n=q=zn;
Ada hi!`9k
with Ada.Text_Io; use Ada.Text_Io; UVrQV$g!
procedure Hello is ]nQ+nH
begin Y,C=@t@_
Put_Line ("Hello, world!"); |XRImeF'd
end Hello; >-M ]:=L
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汇编语言 ?OE#q$ g
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x86 CPU,DOS,TASM F|Q H
MODEL SMALL @D~B{Hg
IDEAL Z0$] tS
STACK 100H :$?Q D
);Z]SGd
DATASEG WWNu:,
HW DB 'Hello, world!$' >"%ob,c:#
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CODESEG \:Za[6
MOV AX, @data R(G\wqHUT3
MOV DS, AX ?sXG17~Bm
MOV DX, OFFSET HW 9C/MRmv`
MOV AH, 09H }$&xTW_
INT 21H 6V1:qp/6
MOV AX, 4C00H $e
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INT 21H l'6d4
DZ
END !77NG4B
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x86 CPU,GNU/Linux,NASM 2/B)O)#ls
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 1oty*c
;Enter this into "hello.asm" then type: xzm@
v(
;"nasm -f elf hello.asm" )6-9)pH@)
;"ld hello.o -o hello" [ ny6W9
;"./hello" ZSB?Y1wG
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section .data ;data section declaration vN65T$g7
msg db 'Hello World!',0AH n-J2/j
len equ $-msg ;string length C5*xQlCq}
| kXm}K
section .text ;code section declaration };b1aha G
global _start ;entry point (start of execution) irKIy
_start: mov edx,len ;string length k_ Y~;P@
mov ecx,msg ;string start Dz;HAyPj
mov ebx,1 ;file handle: stdout \S4SI
mov eax,4 ;sys_write mrM4RoO
int 80h ;kernel system call Qhn;`9+L
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mov ebx,0 ;return value })Yv9],6
mov eax,1 ;sys_exit P`(Mk6gE
int 80h ;kernel system call lr~0pL
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x86 CPU,Windows,MASM32 uwmQ?LS]V
.386 TTZe$>f
.model flat,stdcall ~aTKG|74
option casemap:none `VT>M@i/
;Include 文件定义 |^a;77nE_^
include windows.inc eGL<vX
include user32.inc !yJICjXj
includelib user32.lib )8,|-o=
include kernel32.inc |(%zb\#9
includelib kernel32.lib 5l{Ts04k%
;数据段 ~F!,PM/
.data 8)j@aiF`
szCaption db 'A MessageBox!',0 V
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szText db 'Hello,world!',0 *if`/N-q(m
;代码段 CvDxq:x
.code 6RoAl$}'
start: =qu(~]2(
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK w7TJv4_
invoke ExitProcess,NULL $B (kZ
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 33Az$GXFsq
end start 2C=Q8ayvX
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AWK nw6pV%
BEGIN { print "Hello, world!" } =9wy/c$
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BASIC KP]"P*?
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传统版BASIC(例如GWBASIC): 0~Gle:
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10 PRINT "Hello, world!" eiVC"0-c}
20 END L|j%S
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或在提示符输入: 8LzBh_J?
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?"Hello, world!":END ]?+{aS-]?k
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现代版BASIC(例如Quick BASIC): >ut" OL9J
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Print "Hello, world!" ac{?+]8}
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以下的语句在Quick BASIC中同样有效: b KtD"JG\
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? "Hello,world!" 4rg2y]
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ca
BCPL zeb=8Dg
:
GET "LIBHDR" tq1CwzRX
> L2HET
LET START () BE _}xd}QW
$( V)ig)(CT
WRITES ("Hello, world!*N") Yf@e=:
$) L{-LX=G^
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fWnD\mx?0
Befunge QS[L~97m2M
"!dlrow olleH">v $'rG-g!f\
, w"Y` ]2
^_@ >$WQxbwM(
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Brainfuck w8S!%abl1
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+++++++++++++++.>.+++.------.--------.>+.>. l7H
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C RD7^&
#include <stdio.h> t]jFo
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int main(void)
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{ K.<.cJE
printf("Hello, world!\n"); v{zMO:3
return 0; @hQlrq5c
} 58\&/lYW
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C++ RqEH|EUZ
#include <iostream> o8/;;*
)a9 ]US^
int main() c0B|F
{ c\B|KhDk
std::cout << "Hello, world!" << std::endl; F'jWV5"*
return 0; C2LL|jp*
} IG)s^bP
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*n"/a{6>
C++/CLI B~o\+n
int main() 7S/G
B
{ Ya>oCr}K
System::Console::WriteLine("Hello, world!"); *.L81er5~
} kt`nbm|aw
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C# (C Sharp) 4wC+S9I#E^
class HelloWorldApp l^ZI* z7N
{ /VmR<C?h
public static void Main() R\o<7g-|
{ yFDv6yJ.
System.Console.WriteLine("Hello, world!"); m_?d=o
} MZ Aij
} R|O8RlH
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COBOL ,0x y\u
IDENTIFICATION DIVISION. JkW9D)6
PROGRAM-ID. HELLO-WORLD. a=M\MZK>
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ENVIRONMENT DIVISION. fRg`UI4w}
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DATA DIVISION. t]7&\ihZi~
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PROCEDURE DIVISION. n1!?"m!
DISPLAY "Hello, world!". *OuStr \o
STOP RUN. )Ke*JJaq
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Common Lisp aW>6NDq(
(format t "Hello world!~%") =Umw$+fJr
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DOS批处理 !\&