“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。 :iJ+ImBpK
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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》。 `oP :F[B
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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+AAhn
Ada aOWW..|
with Ada.Text_Io; use Ada.Text_Io; )8vz4e Y
procedure Hello is d:*,HzG
begin Br.$:g#
Put_Line ("Hello, world!"); eAN]*:]g
end Hello; >2tQ')%DJ
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汇编语言 r'xZF~}k"~
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x86 CPU,DOS,TASM ;Ak<O[
MODEL SMALL $,$bZV
IDEAL %D_2;
STACK 100H `>&V_^y+
mn;;wp
DATASEG !_CBf#0
HW DB 'Hello, world!$' 6Mu_9UAl`
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CODESEG 3T^f#UT
MOV AX, @data @\0U`*]^)
MOV DS, AX rOd<nP^`\
MOV DX, OFFSET HW 734)s
MOV AH, 09H 1!_$HA
INT 21H [4L[.N@
MOV AX, 4C00H AsJN~<0h
INT 21H +bpUb0.W
END 4FURm@C6
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x86 CPU,GNU/Linux,NASM _N!L?b83P
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ?'ID7mL
;Enter this into "hello.asm" then type: n{sF'n</
;"nasm -f elf hello.asm" AyHhq8Y
;"ld hello.o -o hello" -X+G_rY
;"./hello" hG~4i:p
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section .data ;data section declaration PyQt8Qlz
msg db 'Hello World!',0AH u^.7zL+
len equ $-msg ;string length " B`k
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section .text ;code section declaration t;005]'Mp
global _start ;entry point (start of execution) dr3j<D-Q
_start: mov edx,len ;string length .*\TG/x
mov ecx,msg ;string start /}+VH_N1
mov ebx,1 ;file handle: stdout '}#=I 9=ss
mov eax,4 ;sys_write dH:z_$Mg
int 80h ;kernel system call ,:6gp3
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mov ebx,0 ;return value 7A:k
mov eax,1 ;sys_exit qTc-Z5
int 80h ;kernel system call 8<V6W F`e
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x86 CPU,Windows,MASM32 Zo$,{rl
.386 }%e"A4v
.model flat,stdcall K"Vo'9R[_
option casemap:none NTq#'O) f
;Include 文件定义 KX8$j$yW
include windows.inc RRSkXDU}
include user32.inc e!V3 /*F
includelib user32.lib i'XW)n
include kernel32.inc 5e)2Jt:
includelib kernel32.lib
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;数据段 ;MSdTHN"
.data |#OMrP+oi
szCaption db 'A MessageBox!',0 Buxn!s
szText db 'Hello,world!',0 8ckcTNPu
;代码段 pI>yO~Ve
.code YoC{ t&rY
start: S"-q*!AhK
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK d}d1]@Y\
invoke ExitProcess,NULL F7o#KN*.]
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 6Bv!t2
end start \/qo2'V
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BEGIN { print "Hello, world!" } ~Qg:_ @@\
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BASIC ,Z3 (`ftC
传统版BASIC(例如GWBASIC): %R|_o<(#MJ
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10 PRINT "Hello, world!" 2YW|/o4
20 END , ZisJksk
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或在提示符输入: J&hzr t
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?"Hello, world!":END W't?aj I|
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现代版BASIC(例如Quick BASIC): n0\k(@+k
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Print "Hello, world!" h)NZG6R
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以下的语句在Quick BASIC中同样有效: hXAgT!ZD
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? "Hello,world!" MBIlt
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BCPL YK{E=<:
GET "LIBHDR" },]G +L;R
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LET START () BE 8*bEsc|
$( 8\lRP,-
WRITES ("Hello, world!*N") {0(:5%
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Befunge u4KP;_,m
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C e[($rsx
#include <stdio.h> |19zjhl
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int main(void) xX:N-
{ ?= RC?K
printf("Hello, world!\n"); AzZb0wW6p
return 0; + e3{J _
} DGJt$o=&@
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C++ 1
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#include <iostream> L#~z#
(Do](C
int main() YVW`|'7)|
{ N]dsGvX
std::cout << "Hello, world!" << std::endl; )Kbz gmLr
return 0; )OE!vA
} c?t,,\o(}
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C++/CLI sMDHg
int main() ',l}$]y5
{ nl/~7({
System::Console::WriteLine("Hello, world!"); G9AQIU%ii
} %SC%#_7
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C# (C Sharp) B4RP~^
class HelloWorldApp XdV(=PS!a@
{ Z` zyEP A
public static void Main() HlgkW&