“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。 vj_oMmjKw
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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》。 6F(yH4
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以下是用不同语言写成的Hello World程序的几个例子: m9q%l_
Ada 6?a(@<k_
with Ada.Text_Io; use Ada.Text_Io; (Dn-vY'
procedure Hello is .(hb8 rCM
begin -e)bq:T
Put_Line ("Hello, world!"); nRo`O
end Hello; e;pNB
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汇编语言 JA)gM
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x86 CPU,DOS,TASM i;tA<-$-
MODEL SMALL 3jn@ [ m
IDEAL %-*vlNC )
STACK 100H P! 3$RO
5m bs0GL
DATASEG Ey n3Vv?v
HW DB 'Hello, world!$' QO?ha'Sl
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CODESEG $yc,D=*Isi
MOV AX, @data 'qP^MdoE%~
MOV DS, AX Mb9q<4
MOV DX, OFFSET HW /Z% ?;
MOV AH, 09H o|}%pc3
INT 21H H@3+K$|v
MOV AX, 4C00H m3XH3FgKz
INT 21H (Q4_3<G+
END y-@!, @e
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x86 CPU,GNU/Linux,NASM QbNv+Eu5
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). D4vmBVT
;Enter this into "hello.asm" then type: 3Mcz9exY
;"nasm -f elf hello.asm" U-?
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;"ld hello.o -o hello" =ddx/zN
;"./hello" p}.b#{HJ
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section .data ;data section declaration czb%%:EJs|
msg db 'Hello World!',0AH zo5.}mr+
len equ $-msg ;string length %%Kg'{-:
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section .text ;code section declaration YH[_0!JY^
global _start ;entry point (start of execution) $ i&$ZdX
_start: mov edx,len ;string length CeiU2.:U
mov ecx,msg ;string start Dsua13 hF
mov ebx,1 ;file handle: stdout ZB2'm3'bh
mov eax,4 ;sys_write 3D.S[^s*
int 80h ;kernel system call }ri*e2y)
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mov ebx,0 ;return value [.I,B tY+
mov eax,1 ;sys_exit iR_Syk`G*A
int 80h ;kernel system call Y-Ku2m
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x86 CPU,Windows,MASM32 E5t+;vL~
.386 < t (Pw
.model flat,stdcall 9e)+<H
option casemap:none PVU"oz&T
;Include 文件定义 B0
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include windows.inc (XwLKkw0n
include user32.inc =qtoDe
includelib user32.lib ~fF}
include kernel32.inc {l11WiqQH
includelib kernel32.lib =zjUd 5
;数据段 YKg[k:F
.data !bcbzg2d&
szCaption db 'A MessageBox!',0 )ra66E
szText db 'Hello,world!',0 F=om^6G%X5
;代码段 5Hm!5:ZB
.code {^kG<v.vV
start: QO7:iSZJ
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK by
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invoke ExitProcess,NULL ?iLd5 Z
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end start IeB6r+4|
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AWK Tb={g;0@
BEGIN { print "Hello, world!" } M96( Rg
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BASIC ZQkw}3*n
传统版BASIC(例如GWBASIC): z;C=d(|nN
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10 PRINT "Hello, world!" |3,V%>z
20 END |3s&Y`x-D
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或在提示符输入: cXY'>N
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?"Hello, world!":END ?66(t
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现代版BASIC(例如Quick BASIC): {?mQqoZ?.
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Print "Hello, world!" IOkC [([
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以下的语句在Quick BASIC中同样有效: GeaDaYh#T
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? "Hello,world!" o$ce1LO?|N
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BCPL v7(|K
GET "LIBHDR" 7F(F.ut
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LET START () BE :dguQ|e
$( b!X"2'
WRITES ("Hello, world!*N") 6eT'[Umx
$) GWInN8.5
= (gmd>N
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Befunge R-Q1YHUQM
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, 6rQpK&Jx
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C )6>|bmpU
#include <stdio.h> a*':W%7
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int main(void) 'n[+r}3
{ Ejms)JK+
printf("Hello, world!\n"); I\upnEKKzZ
return 0; >_`D3@Rz
} [DxefYyI
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C++ ls24ccOs
#include <iostream> t\pK`DM-[
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int main() G|-\T(&J
{ oKYhE
std::cout << "Hello, world!" << std::endl; aw/7Z`
return 0; M7DLs;sD
} r)p2'+}pV
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C++/CLI !(*a+ur&i
int main() 'q92E(
{ IE)"rTI)b
System::Console::WriteLine("Hello, world!"); [2'm`tZL
} v1nQs='
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C# (C Sharp) O wA~(
class HelloWorldApp MkDK/K$s
{ ;T.s!B$Uu
public static void Main() ojx'g8yO
{ bEBBwv
System.Console.WriteLine("Hello, world!"); R3j#WgltP
} #*$_S@
} {^cF(7p
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