“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。
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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》。 q
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以下是用不同语言写成的Hello World程序的几个例子: rWFcIh5
Ada kByrhK5U
with Ada.Text_Io; use Ada.Text_Io; $W/+nmb)@K
procedure Hello is y^d[( c
begin xI@$aTGq
Put_Line ("Hello, world!"); ljYpMv.>xG
end Hello; :>P4L,Da]
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汇编语言 tM^;?HL]
5?5-;H
x86 CPU,DOS,TASM )+n,5W
MODEL SMALL b46[fa
IDEAL BKC7kDK3H
STACK 100H \K?(
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DATASEG fO^e+Mz
HW DB 'Hello, world!$' la\zaKC;>
r zM Fof
CODESEG axK6sIxx
MOV AX, @data n+{HNr
MOV DS, AX M5GY>3P$c
MOV DX, OFFSET HW rU=b?D)n!w
MOV AH, 09H jl.okWuiY
INT 21H [=F>#8=
MOV AX, 4C00H j+DE|Q&]I
INT 21H ,4^9cFVo
END bQ-Gp;]
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x86 CPU,GNU/Linux,NASM mje<d"bW
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 0jxO |N2)
;Enter this into "hello.asm" then type: r0\cc6
;"nasm -f elf hello.asm" cGgM8
;"ld hello.o -o hello" f._l105.
;"./hello" xS6(K
1)TK01R8
section .data ;data section declaration ]2Sfkl0
msg db 'Hello World!',0AH yicO!:bM
len equ $-msg ;string length J\het2?\
t"<s} ~
section .text ;code section declaration v5(q)h
global _start ;entry point (start of execution) -1qZqU$h
_start: mov edx,len ;string length {S[I_\3
mov ecx,msg ;string start C%giv9a
mov ebx,1 ;file handle: stdout 9$Ig~W)
mov eax,4 ;sys_write Z?m
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int 80h ;kernel system call 5Z/yhF.{
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mov ebx,0 ;return value CF]i}xpWV
mov eax,1 ;sys_exit >qR7'Q wP
int 80h ;kernel system call 7#QLtU
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x86 CPU,Windows,MASM32 ,Pn-ZF
.386 l B1#
.model flat,stdcall #EJhAJ
option casemap:none 3pvYi<<D'
;Include 文件定义 ,zQo {.
include windows.inc ac9qj
include user32.inc AgIazv1
includelib user32.lib XC=%H'p
include kernel32.inc >D 97c|?c
includelib kernel32.lib h@=7R
;数据段 {@?G 9UypA
.data _@Y"$V]=Vt
szCaption db 'A MessageBox!',0 t)` p@]j
szText db 'Hello,world!',0 WzjL-a(
;代码段
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.code pe9@N9_5
start: [r(Qs|
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK o/C(4q6d
invoke ExitProcess,NULL 7c-Gm R2
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 'l~6ErBSg
end start X 7=fX~s
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BEGIN { print "Hello, world!" } l[ne/O
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BASIC 4[TR0bM%
传统版BASIC(例如GWBASIC): <\" .L
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10 PRINT "Hello, world!" $6T3y8
20 END } VEq:^o.
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或在提示符输入: UNDi_6Dy
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?"Hello, world!":END AVG>_$<
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现代版BASIC(例如Quick BASIC): ,m^;&&
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Print "Hello, world!" 1DE@N1l
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以下的语句在Quick BASIC中同样有效: QK; T~
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? "Hello,world!" ;;Ds
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BCPL 2 -Xdoxw
GET "LIBHDR" MgJ36zM
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LET START () BE x0Yse:RE^
$( Zj*\"Ol
WRITES ("Hello, world!*N") Fl3#D7K
$) 9b;A1gu
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Befunge 'Z&;uv,l
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C al&(-#1
#include <stdio.h>
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int main(void) LN2D
{ vuQ%dDxI
printf("Hello, world!\n"); J#2!ZQE
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return 0; ]i*](UQ
} %\$;(#h
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C++ 5S{7En~zUE
#include <iostream> JUAS$Y
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int main() V DS23Bo
{ &w8)* T
std::cout << "Hello, world!" << std::endl; Wu6<\^A
return 0; US [dkbKo
} ]iNEw9
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C++/CLI llV3ka^!
int main() 41a.#o
{ COzyG.R.
System::Console::WriteLine("Hello, world!"); D}C,![
} OS|> t./U
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C# (C Sharp) G`fC/Le
class HelloWorldApp r|e-<t4.9L
{ vsWHk7 9
public static void Main() VQ5nq'{v
{ Cv
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System.Console.WriteLine("Hello, world!"); f
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} G$0c'9d*(
} -x8nQ%X
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COBOL x_Jwd^`t!
IDENTIFICATION DIVISION. C98]9
PROGRAM-ID. HELLO-WORLD. 'I;!pUfVp
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ENVIRONMENT DIVISION. n+lOb
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DATA DIVISION. "8^5>EJWv
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PROCEDURE DIVISION. [gy*`@w
DISPLAY "Hello, world!". -[U1]R
STOP RUN. y2]-&]&
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Common Lisp :1t~[-h^
(format t "Hello world!~%") { -|{xBd
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DOS批处理 qd8n2f
@echo off D+_oVob\
echo "Hello, world!" H$G0`LP0/a
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Eiffel |#6QThK
class HELLO_WORLD p!k7C&]E
1]orUF&_
creation HB
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make #Z6'?p9
feature vSi_t
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make is meN2ZB?Y
local TuW %zF/
io:BASIC_IO T3`ludm^u
do L\y;LSTU
!!io aK`@6F,]j
io.put_string("%N Hello, world!") Y&/]O$<
end -- make )_/5*Ly@
end -- class HELLO_WORLD sdQkT# %y
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Erlang #j *d^j&
-module(hello). p~*UpU8u
-export([hello_world/0]). ?nP*\8
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hello_world() -> io:fwrite("Hello, World!\n"). Sm~l:v0%
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Forth keB&Bjd&
." Hello, world!" CR =XXZ?P
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Fortran /z BxJT0
WRITE(*,10) ?_I[,N?@41
10 FORMAT('Hello, World!') qhT@;W/X
STOP X^WrccNX
END rk)##)
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|=&cQRY!p
HTML -WYAN:s
<HTML> bf9a1<\
<HEAD> h,Q3oy\s1
<TITLE> Hello World! </TITLE> ^5=B`aich
</HEAD> qL,tYJ<m%
<BODY> c+2FC@q{l
<p>Hello World!</p> C`5
</BODY> EY \H=@A
</HTML> H<^/Ati,|
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INTERCAL wQRZ"ri,
PLEASE DO ,1 <- #13 `3:.??7N
DO ,1 SUB #1 <- #238 !E T~KL!
DO ,1 SUB #2 <- #112 %Q.&ZhB
DO ,1 SUB #3 <- #112 @r?Uua
DO ,1 SUB #4 <- #0 ;&