“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。 $MR4jnTT
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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》。 ewR0e.g
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以下是用不同语言写成的Hello World程序的几个例子: `,z{7 0
Ada mE1*F'0a
with Ada.Text_Io; use Ada.Text_Io; a'r\e2/e?H
procedure Hello is 2TO1i0
begin 1>LquZ+Kj
Put_Line ("Hello, world!"); 0!T $Ef
end Hello; :/08}!_:
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汇编语言 v,! u{QP
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x86 CPU,DOS,TASM hi%>&i*
MODEL SMALL {WChD&v
IDEAL ~V5jjx*
STACK 100H |b'AWI81D
CEiGjo^
DATASEG e~1??k.;=
HW DB 'Hello, world!$' Z~
(QV0}
j&r5oD;
CODESEG ofV{SeD67
MOV AX, @data ^B7Aam
MOV DS, AX pbNVj~#6
MOV DX, OFFSET HW 2P*O^-zRp
MOV AH, 09H
}#1g;
INT 21H i@6 kIC
MOV AX, 4C00H uQ}kq7gd
INT 21H !{+(oDN
END &^"m6
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x86 CPU,GNU/Linux,NASM `Bx CTwc
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 4R.#=]F
;Enter this into "hello.asm" then type: )!Bv8&;e
;"nasm -f elf hello.asm" 2zAS
\Y
;"ld hello.o -o hello" lEJTd3dMi
;"./hello" 3UEh%Ho
eL*Edl|#
section .data ;data section declaration QCMF_;aNI
msg db 'Hello World!',0AH $t^`Pt*:u
len equ $-msg ;string length '-et:Lv7
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section .text ;code section declaration ;)*Drk*t,
global _start ;entry point (start of execution) 4^
A\w
_start: mov edx,len ;string length H~&'`h1
mov ecx,msg ;string start !^%b|=[
mov ebx,1 ;file handle: stdout %%#zO
Z
mov eax,4 ;sys_write mOBS[M5*
int 80h ;kernel system call 59|Tmf(dS;
Sn0 Gw
mov ebx,0 ;return value A-kI_&g\Og
mov eax,1 ;sys_exit +Z+]Tqo
int 80h ;kernel system call 2X:n75()
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j`bOJTBE
x86 CPU,Windows,MASM32 V@F~Cx
.386 n#iL[
&/Aw
.model flat,stdcall z`W$/tw"
option casemap:none ><Z2uJZ4x
;Include 文件定义 8AK#bna~-
include windows.inc gC?k6)p$N
include user32.inc @uHNz-c
includelib user32.lib 16AYB17
include kernel32.inc /PO5z7n0J
includelib kernel32.lib '{EDdlX
;数据段 )%0#XC^/X5
.data fz%urbJR
szCaption db 'A MessageBox!',0 :jA~zHO
szText db 'Hello,world!',0 a"}?{
;代码段 w%htY.-
.code r'j*f"uAm
start: IP-mo!Y.
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK $WDa}~j~^
invoke ExitProcess,NULL L(iWFy1& T
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> TB9ukLG^<<
end start \JX8`]|&
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BEGIN { print "Hello, world!" } 3AWg 43L7
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BASIC C{4[ 7
传统版BASIC(例如GWBASIC): RszqDm
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10 PRINT "Hello, world!" +<I>]J2
20 END 1^vN?#Kt
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或在提示符输入: 74>.E^/x
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?"Hello, world!":END f>dWl$/_s
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现代版BASIC(例如Quick BASIC): mIt=r_
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Print "Hello, world!" rZ<@MV|d
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以下的语句在Quick BASIC中同样有效: ~ u jY+{
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? "Hello,world!" `uY77co6
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BCPL 0 }
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GET "LIBHDR" Y*0mC "n}
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LET START () BE 0P z"[
$( y<MXd,eE
WRITES ("Hello, world!*N") 0I1bY]*
$) E`$d!7O
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[+UF]m%W
Befunge |-bAzt
"!dlrow olleH">v <a; <|Fm.
, h",kA(+P
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Brainfuck 2+50ezsId
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< !A qSG-
+++++++++++++++.>.+++.------.--------.>+.>. j8P=8w{
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C O1Vs!
#include <stdio.h> s"s^rC
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int main(void) `*^
f =y
{ fnl~0
printf("Hello, world!\n"); %8s$l'Q;
return 0; <;G.(CK@n
} [5yLg
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C++ bkTk:-L5:
#include <iostream> [jU.58*
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int main() qXcHf6
{ Jsde+G,N
std::cout << "Hello, world!" << std::endl; -pvF~P?8U
return 0; llN#4D9s
} [f 4Nq \i
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C++/CLI 6B'd]Fe
int main() [,JUC<
{ VXX7Y?!
System::Console::WriteLine("Hello, world!"); DvhJkdLB>
} Pv@Lx+k
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C# (C Sharp) G&,F-|`
class HelloWorldApp "k&QS@l
{ p,0J $L
public static void Main() Z7)la
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{ xvU@,bzz
System.Console.WriteLine("Hello, world!"); A0JlQE&U
} EbXWCD
} t*KgCk 1
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COBOL u4hC/!
IDENTIFICATION DIVISION. ;d5d$Np@m&
PROGRAM-ID. HELLO-WORLD. ufq9+}
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ENVIRONMENT DIVISION. s1~&PH^
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DATA DIVISION. re[v}cB
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PROCEDURE DIVISION. K FM x(fD
DISPLAY "Hello, world!". =zBc@VTp
STOP RUN. c{4Y?SSx
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Common Lisp 6)5Akyz4V
(format t "Hello world!~%") A}"aH
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: ZehBu
DOS批处理 *{TB<^ *
@echo off 9\f%+?p
echo "Hello, world!" pT ]: TRPS
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_e4%<!1
Eiffel (
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class HELLO_WORLD q#pD}Xe$
2":{3=oW~
creation %OT} r
make #z$g1\v
feature :9?y-X
make is u?xXZ]_u-
local L JW0UF|
io:BASIC_IO ?OD43y1rzd
do jc0Trs{Jf
!!io q/qJkr^2
io.put_string("%N Hello, world!") u/6b.hDO
end -- make pA?kv]l(
end -- class HELLO_WORLD ?R#?=<VkG
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Erlang qE:/~Q0
-module(hello). + 0DPhc
-export([hello_world/0]). xr yXO(
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hello_world() -> io:fwrite("Hello, World!\n"). qL;u59
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Forth @a~GHG[x
." Hello, world!" CR t?l0L1;
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