“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。 xi.?@Lff
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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》。 E#Ue9J
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以下是用不同语言写成的Hello World程序的几个例子: 5wh(Qdib
Ada Fje
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with Ada.Text_Io; use Ada.Text_Io; 2-qWR<E
procedure Hello is fV7
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begin ws,?ImA
Put_Line ("Hello, world!"); NX(IX6^y
end Hello; |x1Ttr,
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汇编语言 muF&t'k
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x86 CPU,DOS,TASM >wb*kyO7(#
MODEL SMALL QD^= ;!
IDEAL S/y(1.wh
STACK 100H k5bv57@
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DATASEG [:e>FXV
HW DB 'Hello, world!$' ? N]bFW"t|
!IC
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CODESEG bzZdj6>kX
MOV AX, @data X=6L-^o)
MOV DS, AX ,g?M[(wtc
MOV DX, OFFSET HW V_v+i c^
MOV AH, 09H 0L"uU3
INT 21H 0{o 8-#
MOV AX, 4C00H U:MZN[Cc[
INT 21H RN1KM
END GO][`zZJ]
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x86 CPU,GNU/Linux,NASM yfFe%8w_vw
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). hN1[*cF
;Enter this into "hello.asm" then type: tC f@v'1t
;"nasm -f elf hello.asm" l{ fL~O
;"ld hello.o -o hello" c[OQo~m$
;"./hello" D,-L!P
#vBSg
section .data ;data section declaration JL:B4f%}B
msg db 'Hello World!',0AH ov!L8
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len equ $-msg ;string length <bv9X?U
ND 8;1+3
section .text ;code section declaration aM8z_j!!u
global _start ;entry point (start of execution) ;4oKF7]
_start: mov edx,len ;string length =*y{y)B^g
mov ecx,msg ;string start MI8c>5?
mov ebx,1 ;file handle: stdout ;%u)~3B$JK
mov eax,4 ;sys_write &.0 wPyw
int 80h ;kernel system call <sGioMr
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mov ebx,0 ;return value uA%F0oM
mov eax,1 ;sys_exit Z>@\!$Mc
int 80h ;kernel system call Xd~li fF
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x86 CPU,Windows,MASM32 6XeqK*r*
.386 *OKve
.model flat,stdcall (G"/C7q
option casemap:none }
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;Include 文件定义 xoE,3Sn
include windows.inc 3e^'mT
include user32.inc C9T-4o1
includelib user32.lib MP 8s}
include kernel32.inc cXOb=
includelib kernel32.lib rk?G[C)2c
;数据段 n ZS*"O#L
.data 3Q+THg3~?
szCaption db 'A MessageBox!',0 zhwajc
szText db 'Hello,world!',0 vnz}Pr! c
;代码段 _~ 7cn
.code :3*0o3C/
start: ';x5 $5k'
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK s0'Xih sw6
invoke ExitProcess,NULL :cTwp K
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> =CO#Q$
end start 7Rom#Kl:
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BEGIN { print "Hello, world!" } JSiLG0
j2{ '!
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BASIC ,t>/_pI+=
传统版BASIC(例如GWBASIC): C0Ti9
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10 PRINT "Hello, world!" ag$UNV
20 END &+t,fwlM
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或在提示符输入: 4;d9bd)A
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?"Hello, world!":END =2[cpF]
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现代版BASIC(例如Quick BASIC): m)?cXM
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Print "Hello, world!" dPRGL
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以下的语句在Quick BASIC中同样有效: nZM|8
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? "Hello,world!" p,9eZUGy
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BCPL 5fBW#6N/
GET "LIBHDR" n2H2G_-L[
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LET START () BE A`Bg"k:D
$( @cF
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WRITES ("Hello, world!*N") `7|v
$) C@L:m1fz
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Befunge }T+pd#>
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Brainfuck Jh[fFg]
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+++++++++++++++.>.+++.------.--------.>+.>. i3>7R'q>
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C mg*[,_3q33
#include <stdio.h> f|_iHY
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int main(void) h 5ST`jZ
{ )}7rM6hv
printf("Hello, world!\n"); h4S,(*V$!
return 0; qI"@ PI!s
} pVPCxP
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C++ a4L8MgF&$-
#include <iostream> BD9W-mF
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int main() WeE>4>^
{ > c?Z.of
std::cout << "Hello, world!" << std::endl; O!kBp(?]
return 0; InMF$pw
} ;+`t[ go
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C++/CLI [GX5jD#
int main() B{lBUv(B
{ xf?*fm?m
System::Console::WriteLine("Hello, world!"); YUat}-S
} M;,Q8z%
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C# (C Sharp) |[;9$Vn
class HelloWorldApp +dcBh Dq
{ htj:Z:C`
public static void Main() #TM+Vd$
{ o
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System.Console.WriteLine("Hello, world!"); KyK%2:
} O{uc
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} 8<z+hWX=4
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COBOL Stq&^S\x69
IDENTIFICATION DIVISION. Eq=~S O%
PROGRAM-ID. HELLO-WORLD. \wEHYz
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ENVIRONMENT DIVISION. _]@
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DATA DIVISION. Gjfb<
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PROCEDURE DIVISION. gQMcQV]C$
DISPLAY "Hello, world!". Jd?N5.
STOP RUN. $L7Z_JD5
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Common Lisp t%Sgw%f
(format t "Hello world!~%") Ut.%=o;&[
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DOS批处理 BdBwfH%:
@echo off '/8{Mx+
echo "Hello, world!" n@|5PI"bx
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Eiffel mq
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class HELLO_WORLD czNi)4x
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creation 4Z8FLA+T,
make #uTNf78X
feature )Fk*'6
make is @^P<(%p
local 8Of.n7{
io:BASIC_IO sgYPR
do KU$:p^0l;*
!!io XZ%3PMq
io.put_string("%N Hello, world!") de7
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end -- make mok94XuK)
end -- class HELLO_WORLD Me;XG?`
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Erlang 2|`7_*\
-module(hello). gXJtk;
-export([hello_world/0]).
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hello_world() -> io:fwrite("Hello, World!\n"). >]{{5oOQ>
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%CoO-1@C
Forth DpCe_Vb%M
." Hello, world!" CR Fs$mLa
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Fortran /,d]`N!
WRITE(*,10) ?,}:)oA_
10 FORMAT('Hello, World!') [_T6
STOP >O]u4G!
END h
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HTML 4V<.:.k
<HTML> t5CJG '!ql
<HEAD> /&N\#;kK?b
<TITLE> Hello World! </TITLE> %)ri:Q q
</HEAD> G#L6;
<BODY> rF$S
<p>Hello World!</p> -G[TlH06
</BODY> zYxA#TZL
</HTML> P^aNAa
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