“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。 5 6R,+sN
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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
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以下是用不同语言写成的Hello World程序的几个例子: .s?OKy
Ada 4s8E:I=K
with Ada.Text_Io; use Ada.Text_Io; {?iqO?
procedure Hello is nXS%>1o,
begin 525 >=h
Put_Line ("Hello, world!"); pSP_cYa#(#
end Hello; ]3,0
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汇编语言 ZL>V9UWN
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x86 CPU,DOS,TASM #Q"vwek
MODEL SMALL Gpu?z-)
IDEAL 6b|`[t
STACK 100H E~P0}'
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DATASEG !O-+h0Z
HW DB 'Hello, world!$' @FV;5M:I
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CODESEG 8iN As#s
MOV AX, @data (?!0__NN;
MOV DS, AX ,Aii>D]
MOV DX, OFFSET HW ;cr6Xop#?
MOV AH, 09H #77UKYj2L-
INT 21H NjxW A&[ng
MOV AX, 4C00H m+UdT854
INT 21H Q(6(Scp{
END
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x86 CPU,GNU/Linux,NASM hl:eF:'hm
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). {1%ZyY
;Enter this into "hello.asm" then type: >B
;"nasm -f elf hello.asm" v~Qy{dn
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;"ld hello.o -o hello" zTB9GrU
;"./hello" Yn>zR I
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section .data ;data section declaration =@ZtUjcJx
msg db 'Hello World!',0AH 0 l@P]_qq`
len equ $-msg ;string length l,FoK76G
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section .text ;code section declaration @45 H8|:k
global _start ;entry point (start of execution) ea0tx3'
_start: mov edx,len ;string length zIFL?8!H9{
mov ecx,msg ;string start >G2-kL_
mov ebx,1 ;file handle: stdout PuaosMn(9
mov eax,4 ;sys_write D8Rmxq!
int 80h ;kernel system call @U{M"1zZe
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mov ebx,0 ;return value l`&6W?C
mov eax,1 ;sys_exit c5e\ckqm^
int 80h ;kernel system call [r8 d+
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x86 CPU,Windows,MASM32 lg>AWTW[
.386 lM*O+k
.model flat,stdcall `uA&w}(G
option casemap:none Nh9!lB m*]
;Include 文件定义 =bWq 3aP)P
include windows.inc |:+pPh!-
include user32.inc +3>/,w(x
includelib user32.lib x
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include kernel32.inc rVy\,#|
includelib kernel32.lib 03WRj+w
;数据段 q&Wwtqc9
.data X&.$/xaT
szCaption db 'A MessageBox!',0 [!?,TGM}^
szText db 'Hello,world!',0 -/c1qLdQ
;代码段 0t?<6-3`/
.code K=TW}ZO
start: i%PHYSJ.
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK .oj" ru
invoke ExitProcess,NULL 43=-pyp
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ?]D+H%3[$i
end start y%bqeo
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BEGIN { print "Hello, world!" } NoZ4['NI\
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BASIC BC{J3<0bf@
传统版BASIC(例如GWBASIC): 8/?uU]#Q
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10 PRINT "Hello, world!" }|"*"kxi!
20 END `OReSg
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或在提示符输入: D.R|HqZ
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?"Hello, world!":END ;To+,`?E;q
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现代版BASIC(例如Quick BASIC): rbun5&RCyW
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Print "Hello, world!" yn":!4U1
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以下的语句在Quick BASIC中同样有效: LY!3u0PnlT
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? "Hello,world!" GVc[p\h(
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BCPL Qn)[1v
GET "LIBHDR" 1fhK{9#
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LET START () BE ]AA*f_!
$( r]EZ)qp^@
WRITES ("Hello, world!*N") X:-bAu}D
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$_7d! S"
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Befunge nB Iv{
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Brainfuck _KhEwd
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ]#-/i2-K
+++++++++++++++.>.+++.------.--------.>+.>. i2}=/
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C Ta\8>\6
#include <stdio.h> HD8"=7zJk
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int main(void) KYmWfM3^
{ M|E2&ht
printf("Hello, world!\n"); 19w,'}CGk
return 0; bb0McEQy
} A"<)(M+kG
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C++ {p*hN i)0
#include <iostream> nK%/tdq
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int main() vb. Y8[
{ CbH T #
std::cout << "Hello, world!" << std::endl; $h]Y<&('G
return 0; uZ`d&CEh
} p5# P
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C++/CLI G5nj,$F+
int main() cwWSNm|
{ 'oHOFH9:{b
System::Console::WriteLine("Hello, world!"); voej ~z+
} CWe>jlUQ
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C# (C Sharp) Yx}"> ;\
class HelloWorldApp ?(NT!es
{ 5IE+M
public static void Main() <&Y}j&(
{ J,0WQQnb
System.Console.WriteLine("Hello, world!"); gC_s\WU
} 6(q`Oj
} 5)>ZO)F&
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COBOL !Nxn[^[?.
IDENTIFICATION DIVISION. @F(3*5c_Y
PROGRAM-ID. HELLO-WORLD. mp+\!
?Str*XA;
ENVIRONMENT DIVISION. K'{W9~9Lq
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DATA DIVISION. g"dZB2`C
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PROCEDURE DIVISION. ^~r&}l4c,
DISPLAY "Hello, world!". qJFgbq4-
STOP RUN. U3|&Jee
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Common Lisp d0}%%T
(format t "Hello world!~%") DvRA2(M
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DOS批处理 [`zbf_RyO
@echo off =S[FJaIu7
echo "Hello, world!" 6Er0o{iI
/!{A=N
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Eiffel \{MrQ2jd
class HELLO_WORLD w[,?-Xm
gSv[4,hXd
creation EDgob^>
make 8W1K3[Jj<
feature 5fj
make is bDh:!M
local ]lB3qEn<
io:BASIC_IO 8%2rgA
do z"s%#/#
!!io 7S dV%"
io.put_string("%N Hello, world!") vzohq1r5
end -- make &`
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end -- class HELLO_WORLD =_?pOq
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Erlang O'!r]0Q
-module(hello). "3Xv%U9@
-export([hello_world/0]). <