“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。 :e vc
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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》。 <L#r6y~H
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以下是用不同语言写成的Hello World程序的几个例子: *j :5
Ada :?W:'% (`[
with Ada.Text_Io; use Ada.Text_Io; 8[IifF1M=&
procedure Hello is .Dxrc
begin SVz.d/3Y
Put_Line ("Hello, world!"); }CqIKoX.
end Hello; <9ph c
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汇编语言 vLS6Gb't
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x86 CPU,DOS,TASM &>t1A5
MODEL SMALL Xxw.{2Ji!q
IDEAL mq9&To!
STACK 100H V@f#/"u'
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RT}Ee}Y
DATASEG [wYQP6Cyy
HW DB 'Hello, world!$' @S):a`J
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CODESEG U%l{>*q
MOV AX, @data .C?g nOq
MOV DS, AX ,r4af<
MOV DX, OFFSET HW a@1gMZc*
MOV AH, 09H `rQl{$9IC
INT 21H \C|06Bs$
MOV AX, 4C00H e0 EJ[bG
INT 21H F4Z0g*^x
END ~=*_I4,+r
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x86 CPU,GNU/Linux,NASM !I&Sy]G
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). YgDasKFm'
;Enter this into "hello.asm" then type: nfB9M1Svn
;"nasm -f elf hello.asm" hiuPvi}
;"ld hello.o -o hello" R 5zV=N
;"./hello" f;a6ux#
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section .data ;data section declaration <'33!8
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msg db 'Hello World!',0AH $<PVzW,$o
len equ $-msg ;string length \ S R
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section .text ;code section declaration dx}!]_mlZ
global _start ;entry point (start of execution) THVF@@q
_start: mov edx,len ;string length V"73^
mov ecx,msg ;string start ^;bkU|(`6
mov ebx,1 ;file handle: stdout ~qH@Kz\%
mov eax,4 ;sys_write ^\%%9jY
int 80h ;kernel system call D%v yO_k
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mov ebx,0 ;return value ]B||S7idq
mov eax,1 ;sys_exit 'Ud5;?{
int 80h ;kernel system call zFIKB9NUn
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x86 CPU,Windows,MASM32 _i#Z'4?2E
.386 GS%Dn^l
.model flat,stdcall I'wAgf6W
option casemap:none 2BY:qz%:
;Include 文件定义 lhU# /}Z
include windows.inc &D#v0!e~x
include user32.inc D![Twlll
includelib user32.lib {ar}.U
include kernel32.inc wDk[)9#A
includelib kernel32.lib wwz<c5
;数据段 `OWB@_u5
.data cjk5><}`H7
szCaption db 'A MessageBox!',0 8:bNFgJD
szText db 'Hello,world!',0 oCS NA.z
;代码段 Mtr~d
.code 'I2)-=ZL6
start: IcZ 'KV
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK \N)FUYoHg
invoke ExitProcess,NULL =k
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> [#tW$^UD
end start [nrP;
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BEGIN { print "Hello, world!" } 2_Qzc&"[
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BASIC ZpyRvDz
传统版BASIC(例如GWBASIC): ~A)$= "
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10 PRINT "Hello, world!" moGbBkO
20 END {)M4h?.2
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或在提示符输入: 5V0=-K
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?"Hello, world!":END =@'"\
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现代版BASIC(例如Quick BASIC): +-"#GL~cC
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Print "Hello, world!" 3^\y>
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以下的语句在Quick BASIC中同样有效: @fwU%S[v
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? "Hello,world!"
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=% p"oj]:
BCPL bu.36\78
GET "LIBHDR" ;"3Mm$
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LET START () BE {:Q2Itsy
$( |Yx8Ez
WRITES ("Hello, world!*N") ra3WLK
$) @P-7a`3*
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;u%h wlo
Befunge )q,}jeM8
"!dlrow olleH">v :/3`+&T^/
, nF-FoO98
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Brainfuck IO+z:D{
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< U;31}'b
+++++++++++++++.>.+++.------.--------.>+.>. bMZ0%(q
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C PIA&s6U
#include <stdio.h> N P"z
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int main(void) (7IF5g\
{ LCG<
printf("Hello, world!\n"); _YY)-H
return 0; }LRAe3N%8
} U{x'@/Ld
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C++ .cb mCFXL
#include <iostream> G`n-WP
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int main() /\9Kr;@vk
{ Z_;' r|c
std::cout << "Hello, world!" << std::endl; %guot~S|
return 0; YP7<j*s8
} z7CYYU?
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C++/CLI 9we=aX5
int main() rEViw?^KT
{ Mf
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System::Console::WriteLine("Hello, world!"); c]9OP9F
} V*?,r<