“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。 +2T!z=
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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》。 [6gO
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以下是用不同语言写成的Hello World程序的几个例子: b1!@v+
Ada uMFV%+I
with Ada.Text_Io; use Ada.Text_Io; E8/rZ~0O~
procedure Hello is .RRlUWu
begin [!?wyv3
Put_Line ("Hello, world!"); T{S4|G1R6
end Hello; QB 77:E
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汇编语言 HcJE0-"
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x86 CPU,DOS,TASM i7eI=f-Q
MODEL SMALL W(&6
IDEAL !dv-8C$U
STACK 100H +{rJ[J/g
am:.NG+
DATASEG 8B@JFpg^
HW DB 'Hello, world!$' #/WAzYt{
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CODESEG =s[&;B`s
MOV AX, @data Gc;B[/:
MOV DS, AX 9e5gy
MOV DX, OFFSET HW 4 iH&:Al
MOV AH, 09H v.`+I-\.z)
INT 21H :t2B^})\
MOV AX, 4C00H dERc}oAh(
INT 21H * bZ\@Qm
END F 1}
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x86 CPU,GNU/Linux,NASM EUwQIA2c8N
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). r'd/qnd
;Enter this into "hello.asm" then type: K+mU_+KRp
;"nasm -f elf hello.asm" R`Qpd3
;"ld hello.o -o hello" sx-F8:Qa
;"./hello" 5\G)Q<A]*L
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section .data ;data section declaration t:9
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msg db 'Hello World!',0AH },6*Y*?{
len equ $-msg ;string length J~dTVBx
fq Y1ggL
section .text ;code section declaration 3'@&c?Fye
global _start ;entry point (start of execution) $Q4=37H+
_start: mov edx,len ;string length pbdF]>\
mov ecx,msg ;string start #`j][F@N
mov ebx,1 ;file handle: stdout ]<X2AO1
mov eax,4 ;sys_write WF)s*$'uz;
int 80h ;kernel system call r~[B_f!
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mov ebx,0 ;return value |#cAsf_{
mov eax,1 ;sys_exit 9cOx@c+/
int 80h ;kernel system call E$T(Qu<-
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x86 CPU,Windows,MASM32 73pC
.386 yfq>,
.model flat,stdcall yjeL9:jH[
option casemap:none qvTKfIl{
;Include 文件定义 Ws>i)6[
include windows.inc 6!RikEAh
include user32.inc 1(pjVz&
includelib user32.lib ,cS0
include kernel32.inc lA4hm4"i(,
includelib kernel32.lib &(0N.=R
;数据段 L?.7\a@
.data VIYV92[
szCaption db 'A MessageBox!',0 wWFW,3b
szText db 'Hello,world!',0 >p |yf.G
;代码段 "VQ|Ed
.code MHNe>C-!q
start: t
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invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK CK Mv7
invoke ExitProcess,NULL Z^+a*^w~{
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> D1!
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end start K#;txzi
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)rbc;{.
AWK r\bq[9dX>
BEGIN { print "Hello, world!" } ]
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BASIC .m!s". ?[
传统版BASIC(例如GWBASIC): sZEgsrJh
E -
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10 PRINT "Hello, world!" @>CG3`?}
20 END R
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或在提示符输入: 1)gv%_
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?"Hello, world!":END !*8#jy
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现代版BASIC(例如Quick BASIC): .f+9 A>
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Print "Hello, world!" @[0jFjK
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以下的语句在Quick BASIC中同样有效: s8yCC#H"
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? "Hello,world!" F\Y,JUn[G
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BCPL
{ $X X
GET "LIBHDR" Jtpa@!M
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LET START () BE n)Hk8)^8
$( @n>{&^-c
WRITES ("Hello, world!*N") GA7u5D"0
$) (Q\\Gw
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4%%B0[Wo_O
Befunge OAY8,C=M
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Brainfuck >|5XaaDa
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+++++++++++++++.>.+++.------.--------.>+.>. v'K
% %z
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C )< l\jfx e
#include <stdio.h> Plb}dID"
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int main(void) CN-4-
{ exsQmbj* %
printf("Hello, world!\n"); vs+We*8H
return 0; kz$(V(k<
} >QA/Mi~R
ws.?cCTpt
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C++ z( *]'Y
#include <iostream> Th_Q
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int main() |x*{fXdMhr
{ nD(w @c?
std::cout << "Hello, world!" << std::endl; <r0.ppgY
return 0; TLXhE(o|o
} uSH>$;a
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C++/CLI >pN;J)H
int main() 7N!tp,?
{ zUNH8=U
System::Console::WriteLine("Hello, world!"); 10/x'#(
} Ri9Kr
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C# (C Sharp) / *AJ+K._
class HelloWorldApp -*rHB&e
{ bkxk
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public static void Main() ?rky6
{ oo;;y,`8py
System.Console.WriteLine("Hello, world!"); IkiQOk
} !T)T_P[
} @< wYT$
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COBOL n9N#&Q"7m
IDENTIFICATION DIVISION. q;CayN'I
PROGRAM-ID. HELLO-WORLD. 8e]z6:}'E
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ENVIRONMENT DIVISION. E"G:K`Q
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DATA DIVISION. <Z2(qZ^Z
F\o;t:
PROCEDURE DIVISION. '.=Wk^,Ua
DISPLAY "Hello, world!". I93 ~8wQ
STOP RUN. \8=e|a5`
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Common Lisp w906aV*s
(format t "Hello world!~%") 0m]~J_
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DOS批处理 3Gc ,I:\
@echo off $o/0A
echo "Hello, world!" ~gSwxGT7d
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6F@zCv"w
Eiffel YtV |e|aD
class HELLO_WORLD i,mrMi
c#
#;5[('&[
creation ;% /6Y~/
make ?BWHr(J
feature b24NL'jm
make is %'RI3gy
local fO[Rf_
io:BASIC_IO Cf.pTYSl
do NvQY7C
!!io |WD,\=J2
io.put_string("%N Hello, world!") #citwMW
end -- make l,imT$u
end -- class HELLO_WORLD #]5&mKi
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Erlang S4#A#a2J
-module(hello). N>uA|<b,
-export([hello_world/0]). 3I'M6WA
l9M#]*{
hello_world() -> io:fwrite("Hello, World!\n"). f28gE7Y\a
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Forth p2pTs&}S
." Hello, world!" CR mXxZM;P[
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