“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。 f"j9C%'*
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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》。 0KgP'oWvY
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以下是用不同语言写成的Hello World程序的几个例子: E' `;
Ada d^6-P
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with Ada.Text_Io; use Ada.Text_Io;
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procedure Hello is 9d/-+j'
begin \a|~#N3?
Put_Line ("Hello, world!"); L YB@L06a
end Hello; 'V:MppQVZ.
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汇编语言 '5$@I{z
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x86 CPU,DOS,TASM |k*bWuXgLs
MODEL SMALL <W8%eRfU
IDEAL -`\^_nVC
STACK 100H G93V=Bk=
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DATASEG a5ZXrWv
HW DB 'Hello, world!$' 9XDSL[[
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[
CODESEG =6:9y}~
MOV AX, @data y6d!?M(0U
MOV DS, AX 579D
MOV DX, OFFSET HW \WC,iA%Y
MOV AH, 09H LkzA_|8:D
INT 21H :* ]#n
MOV AX, 4C00H =gJ{75tV3
INT 21H nyR<pnuC'
END fUWrR1
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x86 CPU,GNU/Linux,NASM ;K8}Yq9p9
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Yu)GV7\2
;Enter this into "hello.asm" then type: {X?1}5ry
;"nasm -f elf hello.asm" SS`\_@ci
;"ld hello.o -o hello" d@{12hq
;"./hello" <^5$))r
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section .data ;data section declaration p\;8?x
msg db 'Hello World!',0AH j[dZ*Jr_
len equ $-msg ;string length F::Ki4{jJ
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section .text ;code section declaration K*DH_\SPK
global _start ;entry point (start of execution) =,N"% }
_start: mov edx,len ;string length Ekq(
mov ecx,msg ;string start sBI/`dGZV
mov ebx,1 ;file handle: stdout qQDe'f~
mov eax,4 ;sys_write y_n4Y[4g
int 80h ;kernel system call vI(LIfe;
dz/@]a
mov ebx,0 ;return value E+XS7':I
mov eax,1 ;sys_exit &gS-.{w "
int 80h ;kernel system call N.z2eo
_)= e`9%
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x86 CPU,Windows,MASM32 z{1A x
.386 U&R)a|
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.model flat,stdcall \VOv&s;h
option casemap:none OZf@cOTWK
;Include 文件定义 ai?J
include windows.inc 2Ul8<${c{
include user32.inc oVHe<zE.
includelib user32.lib u
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include kernel32.inc P#!gP3
includelib kernel32.lib C|Gk}
;数据段 JSju4TQ4
.data ._]Pz6
szCaption db 'A MessageBox!',0 ;Krs*3
s
szText db 'Hello,world!',0
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;代码段 "wZvr}xk
.code 4FYV]p8f
start: ]C"?xy
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 9"S iHp\)
invoke ExitProcess,NULL o@360#njF
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ;Qt/(/
end start ](s5;ta
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BEGIN { print "Hello, world!" } ^}vf
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BASIC eA]8M^
传统版BASIC(例如GWBASIC): xqg4b{
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10 PRINT "Hello, world!" =BR+J9
20 END ,!^c`_Q\>@
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或在提示符输入: ~V ?z!3r-)
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?"Hello, world!":END fATVAv
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现代版BASIC(例如Quick BASIC): T<Y*();Zo
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Print "Hello, world!" {Z <`@\K3
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以下的语句在Quick BASIC中同样有效: |dHtv 6I
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? "Hello,world!" Zi]E!Tgn
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GET "LIBHDR" $u, 6x~>
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LET START () BE |/xA5_-N
$( E6xdPjoWy
WRITES ("Hello, world!*N") p]y.N)a
$) SfY 5Xgp
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Befunge I<<1mEk
"!dlrow olleH">v *K?UWi#$
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#include <stdio.h> ^uw]/H3?L
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int main(void) s"$K2k;J
{ F" M/gy
printf("Hello, world!\n"); [h
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return 0; 862rol
} ]i,o+xBKH
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C++ (#85<|z
#include <iostream> 6Xo "?f
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int main() LTA0WgzR)
{ ,vMAX?c
std::cout << "Hello, world!" << std::endl; Oop6o$k
return 0; zNo"P[J8
} %{V7|Azt
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C++/CLI RTg\c[=w
int main() "|&3z/AUh
{ oXk6,b"
System::Console::WriteLine("Hello, world!"); oz]3
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} }|8^+V&
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C# (C Sharp) s%vy^x29
class HelloWorldApp qW4\t
{ "D4% A!i
public static void Main() o4yl3o
{ }C["'tLX
System.Console.WriteLine("Hello, world!"); EAWBgOO8iC
} G9jf]Ye;
} jHHCJOHB8
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COBOL =\ 5f_g2M
IDENTIFICATION DIVISION. yEh{9S%6p
PROGRAM-ID. HELLO-WORLD. Us#/#-hJ
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ENVIRONMENT DIVISION. hiV!/}'7
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DATA DIVISION. up8d3
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PROCEDURE DIVISION. ?5};ONjN
DISPLAY "Hello, world!". 7l*vmF6Z
STOP RUN. U6H3T0#
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Common Lisp qZV|}M>P)
(format t "Hello world!~%") g;[t1~oF
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DOS批处理 ;0 +Dx~
@echo off km^ZF<. @
echo "Hello, world!" SS_6VE*sI
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Eiffel {w"Cr0F,
class HELLO_WORLD }$uwAevP{y
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creation G[_Z|Xi1
make \WdSj
feature x\:KfYr4Y;
make is v,~fG>Y}
local +`mI\+y,
io:BASIC_IO 2Ir*}s2{
do e$Yvy>I'tS
!!io fJk'5kv
io.put_string("%N Hello, world!") Sj/v:
end -- make 2w+4B4
end -- class HELLO_WORLD b&_Ifx_YF
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R/E6n &R
Erlang EASmB
-module(hello). ; 5[W*,7s
-export([hello_world/0]). ^liW*F"UY
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hello_world() -> io:fwrite("Hello, World!\n"). 3q@JhB
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Forth w0H#M)c
." Hello, world!" CR .EjR<UU
)^6Os2
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Fortran L5|g\Y`
WRITE(*,10) fsnZHL}=n
10 FORMAT('Hello, World!') HmU6:8V
*Z
STOP #D{Eq8dp
END +`V<&
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HTML suLC7x`Z
<HTML> cuy9QBB
:
<HEAD> bBo>Y7%
<TITLE> Hello World! </TITLE> |:2B )X
</HEAD> fWri7|"0h
<BODY> <_=O0 t|6
<p>Hello World!</p> c1y+kvv
</BODY> b<"jmB{
</HTML> WMWMb3
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INTERCAL 9~a 5R]x2
PLEASE DO ,1 <- #13 P-8QXDdr
DO ,1 SUB #1 <- #238 &u6n5-!v
DO ,1 SUB #2 <- #112 dmLx $8
DO ,1 SUB #3 <- #112 !yq98I'
DO ,1 SUB #4 <- #0 q.@% H}
DO ,1 SUB #5 <- #64 ?(Plb&kR
DO ,1 SUB #6 <- #238 O?A%
DO ,1 SUB #7 <- #26 ^si[L52BZ
DO ,1 SUB #8 <- #248 ^~bdAO81
DO ,1 SUB #9 <- #168 A+4Kj~`!
DO ,1 SUB #10 <- #24 vo&h6'i>7
DO ,1 SUB #11 <- #16 cg9}T[A
DO ,1 SUB #12 <- #158 N{@~(>ee^
DO ,1 SUB #13 <- #52 B/n~ $
PLEASE READ OUT ,1 \M0's&