“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。 nC5
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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》。 7E9h!<5v
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以下是用不同语言写成的Hello World程序的几个例子: H19CVc\B
Ada k98}Jx7J)"
with Ada.Text_Io; use Ada.Text_Io; x@]pUA1
procedure Hello is 6A& f
begin k&1~yW
Put_Line ("Hello, world!"); '.wyfS H@
end Hello; AT{ewb
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汇编语言 \k|ZbCWg
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x86 CPU,DOS,TASM F W # S.<
MODEL SMALL ]{[VTjC7rY
IDEAL Z<#beT6
STACK 100H .#b! #
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DATASEG x6ig,N~AO
HW DB 'Hello, world!$' ~4mgYzOmD`
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CODESEG fodr1M4J
MOV AX, @data ?7cF_Zvve
MOV DS, AX M9@#W"
MOV DX, OFFSET HW M#qZ0JT4
MOV AH, 09H nD+vMG1~w
INT 21H ^J>jU`)CJ
MOV AX, 4C00H I^{PnrB
INT 21H p5~;8Q7
END 7 '@l?u/6
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x86 CPU,GNU/Linux,NASM GGs3r;(t
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). tp.qh]2c
;Enter this into "hello.asm" then type: g'`J'6Pn
;"nasm -f elf hello.asm" )]%GNdU
;"ld hello.o -o hello" jBEt!Azur
;"./hello" XRI1/2YA
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section .data ;data section declaration T]nZ3EZ
msg db 'Hello World!',0AH gtHk1 9
len equ $-msg ;string length [PrR30:
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section .text ;code section declaration U"xI1fg%b
global _start ;entry point (start of execution) Z8=4cWI~;
_start: mov edx,len ;string length [j5^Zb&0
mov ecx,msg ;string start V&_5q`L
mov ebx,1 ;file handle: stdout %xR;8IO
mov eax,4 ;sys_write 3Lq?Y7#KQp
int 80h ;kernel system call =ot`V; Q>
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mov ebx,0 ;return value w>X33Ff]8@
mov eax,1 ;sys_exit AO'B p5:Q
int 80h ;kernel system call ?|:!PF*L~z
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x86 CPU,Windows,MASM32 VbtFM=Dg
.386 #cQ[ vE)y
.model flat,stdcall vbQo8GFp}
option casemap:none S[NV-)r=
;Include 文件定义 oS$&jd
include windows.inc oj<.axA,
include user32.inc ^n<p#0)+a
includelib user32.lib ];1z%.
include kernel32.inc e@L'H)w,
includelib kernel32.lib h2KXW}y"4
;数据段 6kjBd3
.data HqU"iY>b
szCaption db 'A MessageBox!',0 3;j?i<kM
szText db 'Hello,world!',0 }_M.-Xm
;代码段 +6f5uMKUvs
.code ''wWw(2O
start: FI~)ZhE)]
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK QHsS|\u
invoke ExitProcess,NULL jjz<V(Sk
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> "31GC7
end start }qW%=;!
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BEGIN { print "Hello, world!" } P7E}^y`e
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BASIC L"tj DAV
传统版BASIC(例如GWBASIC): qB7.LR*'
DSy,#yA
10 PRINT "Hello, world!" qEf)TW(
20 END PF!Q2t5c3
f b_tda",}
或在提示符输入: s iv
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?"Hello, world!":END 'oEFNC9V
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现代版BASIC(例如Quick BASIC): r,MgIv(L
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Print "Hello, world!" t_,iV9NrZ
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以下的语句在Quick BASIC中同样有效: q`}Q[Li
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? "Hello,world!" !hFb<
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BCPL h.4;-&
GET "LIBHDR" oRy?Dx+H
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LET START () BE c1CP12
$( j>?H^fB
WRITES ("Hello, world!*N") _QBd3B%
$) 8+
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Befunge jL%-G
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#include <stdio.h> .m/Lon E
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