“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。 v!H:^!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》。 ZPHXzi3j
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以下是用不同语言写成的Hello World程序的几个例子: c"7j3/p
Ada V }>n
with Ada.Text_Io; use Ada.Text_Io; RsW9:*R
procedure Hello is Rs*vm
begin $<|ocUC7
Put_Line ("Hello, world!"); X eoJ$PfT
end Hello; 9XX>A*
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汇编语言 RW_q~bA9
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x86 CPU,DOS,TASM 4,G w#@
MODEL SMALL |ETiLR=&
IDEAL ][d,l\gu+s
STACK 100H ;gMgj$mI
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DATASEG n,j$D62[
HW DB 'Hello, world!$' [iS,#w`
5
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CODESEG |%1?3Mpn
MOV AX, @data fQ+\;iAU
MOV DS, AX cX:HD+wO
MOV DX, OFFSET HW xY\0zQ
MOV AH, 09H auHFir8f
INT 21H u3J?bR
MOV AX, 4C00H T@[! A);
INT 21H f?56=& pHY
END K=?VDN
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x86 CPU,GNU/Linux,NASM mM/i^zT
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). |.P/:e9
;Enter this into "hello.asm" then type: Fl3#D7K
;"nasm -f elf hello.asm" WKmbNvN^
;"ld hello.o -o hello" K>2 #UzW
;"./hello" Xf
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section .data ;data section declaration ifK%6o6
msg db 'Hello World!',0AH U7iuY~L
len equ $-msg ;string length la
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section .text ;code section declaration 1mH%H*#
global _start ;entry point (start of execution) R}:KE&tq
_start: mov edx,len ;string length !}KqB8;
mov ecx,msg ;string start )US:.7A[.
mov ebx,1 ;file handle: stdout 2+o|A
mov eax,4 ;sys_write &|Pu-A"5~
int 80h ;kernel system call Xm1[V&
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mov ebx,0 ;return value >T jJA#
mov eax,1 ;sys_exit AoaN22
int 80h ;kernel system call [xb]Wf
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x86 CPU,Windows,MASM32 QHt4",Ij
.386 `^9(Ot $
.model flat,stdcall _qXa=|}V.
option casemap:none xJs;v
;Include 文件定义 bEV<iZDq%
include windows.inc Oco YV J
include user32.inc =gh`JN6
includelib user32.lib N_Akmh0D
include kernel32.inc v"^~&q0x
includelib kernel32.lib ]i*](UQ
;数据段 5 BtX63
.data _-~`03 `!
szCaption db 'A MessageBox!',0 Zm
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szText db 'Hello,world!',0 BV`- =wRC
;代码段 a4i:|
.code 5S{7En~zUE
start: X"fh@.
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK o>/O++7R a
invoke ExitProcess,NULL w$Ot{i|$(
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ,)!u)wz
end start (Y%Q|u
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BEGIN { print "Hello, world!" } e`>{$t
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BASIC dq1:s1
传统版BASIC(例如GWBASIC): #-% A[7Cdp
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10 PRINT "Hello, world!" (b,[C\RBF
20 END W5L iXM
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或在提示符输入: 41a.#o
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?"Hello, world!":END F}GPZ=T;
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现代版BASIC(例如Quick BASIC): 2F#q
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Print "Hello, world!" ^D`v3d
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以下的语句在Quick BASIC中同样有效: 9[c%J*r
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? "Hello,world!" 2`GE
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S& #U!#@
BCPL ((tv2
GET "LIBHDR" z7M_1%DEx
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LET START () BE %ek'~
$( Eodn/
WRITES ("Hello, world!*N") sVk$x:k1M
$) 54-#QIx|
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Befunge [[d(jV=*
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#include <stdio.h>
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int main(void) i
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{ )[mwP.T=
printf("Hello, world!\n"); 5zFR7/p{
return 0; \I"Z2N>^z
} ]?x:
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C++ D`J6h,=2l/
#include <iostream> J_Ltuso
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int main() 8]4U`\k4
{ 6 3`{.yZ*z
std::cout << "Hello, world!" << std::endl; V-n&oCS+f
return 0; SS`qJZ|w
} F:y[@Yn
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C++/CLI ?(*t@
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int main() E*L iM5+I
{ "&+"@<
System::Console::WriteLine("Hello, world!"); R4ht6Vm3g)
} n,$IfC"
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C# (C Sharp) pV4Whq$
class HelloWorldApp mUS_(0q
{ OHiQ7#y
public static void Main() lds-T
{ 8-y{a.,u.
System.Console.WriteLine("Hello, world!"); x(<(t:?o
} %IC73?
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dl hdsj:
COBOL >^XBa*4;Y
IDENTIFICATION DIVISION. 6[ OzU2nB
PROGRAM-ID. HELLO-WORLD. 3~nnCR[R
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ENVIRONMENT DIVISION. L\y;LSTU
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DATA DIVISION. /axIIfx-
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PROCEDURE DIVISION. 0b4R
DISPLAY "Hello, world!". %Y!Yvw^&P(
STOP RUN. /dv<qp
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Common Lisp bdGIF'p%
(format t "Hello world!~%") [D*UT#FM
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DOS批处理 Q#nOJ(KV
@echo off JyR/1 W
echo "Hello, world!"
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Eiffel n_3O-X(
class HELLO_WORLD t3dlS`O
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creation kOh{l: 2-+
make 5|jw^s7
feature #v<QbA
make is MwmUgN"g
local &QhX1dT+
io:BASIC_IO Qg6W5Hc
do SM`w;?L:?
!!io _/wV;h~R
io.put_string("%N Hello, world!") < yC
end -- make u|4$+QiD
end -- class HELLO_WORLD ;j4?>3
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Erlang ?B:a|0pf
-module(hello). 'Ysx=
-export([hello_world/0]). JPGzrEaZ
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hello_world() -> io:fwrite("Hello, World!\n"). +[5.WC7J
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Forth 8T(e.I
." Hello, world!" CR J/}:x;Y
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Fortran A^p[52`
WRITE(*,10) |g=="
10 FORMAT('Hello, World!') qL,tYJ<m%
STOP wC5ee:u C%
END 1UKg=A-q
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HTML }g4 M2|
<HTML> H<^/Ati,|
<HEAD> <n(*Xak{a
<TITLE> Hello World! </TITLE> /~^rr
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</HEAD> Yot?=T};3{
<BODY> a{[x4d,z
<p>Hello World!</p> 6P';DB
</BODY> U^Xm)lL
</HTML> )HX|S-qRU=
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INTERCAL 23h%
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PLEASE DO ,1 <- #13 7U"[Gf
DO ,1 SUB #1 <- #238 ",!1m7[wF
DO ,1 SUB #2 <- #112 :sCqjz
DO ,1 SUB #3 <- #112 ;&