“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。 0c$0<2D%
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 ;j#(%U]Vp
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以下是用不同语言写成的Hello World程序的几个例子: w[WyT`6h!
Ada :cvZk|b%
with Ada.Text_Io; use Ada.Text_Io; w6-A-M6hD
procedure Hello is z)Yk&;XC
begin w`N|e0G@
Put_Line ("Hello, world!"); BotGPk><c
end Hello; ~=!d>f~U
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汇编语言 H(JgqbFB*
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x86 CPU,DOS,TASM d-W@/J
MODEL SMALL (eG9b pqr
IDEAL t7t?xk!2
STACK 100H WeqE9@V
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DATASEG |>Q]q
HW DB 'Hello, world!$' ,vxxp]#5
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CODESEG Y`O"+Jr
MOV AX, @data fku\O<1
MOV DS, AX HP$GI
MOV DX, OFFSET HW pBd_BaN
MOV AH, 09H d>RoH]K4
INT 21H ^-*q
MOV AX, 4C00H 6;O fh
INT 21H ,t2yw
END P
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x86 CPU,GNU/Linux,NASM z
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). g}cb>'=={
;Enter this into "hello.asm" then type: Y]u6f c
;"nasm -f elf hello.asm" (P+TOu-y\
;"ld hello.o -o hello" sQ)D.9\~
;"./hello" jo7`DDb
;2NJkn9t
section .data ;data section declaration %gd{u\h^
msg db 'Hello World!',0AH jGeil
qPC
len equ $-msg ;string length 4(h19-V
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section .text ;code section declaration gB&8TE~Y
global _start ;entry point (start of execution) t#fbagTON
_start: mov edx,len ;string length 17\5NgB
mov ecx,msg ;string start 0wh4sKm[X
mov ebx,1 ;file handle: stdout ],?rFK{O
mov eax,4 ;sys_write }!&Vc f
int 80h ;kernel system call Gr&)5hm$
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mov ebx,0 ;return value b3h3$kIYN
mov eax,1 ;sys_exit p4Wy2.&Q
int 80h ;kernel system call c}QWa"\2n
lBYc(cr
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x86 CPU,Windows,MASM32 H}nPaw]G
.386 csEF^T-
.model flat,stdcall &D/@H1fBe
option casemap:none }o'WR'LX
;Include 文件定义 ]12ypcf
include windows.inc xT]|78h$
include user32.inc Pl>BTo>p'
includelib user32.lib BE#s@-zR=p
include kernel32.inc LU=<?"N6
includelib kernel32.lib *hk8[
;数据段 c,v?2*<
.data !xIK<H{*
szCaption db 'A MessageBox!',0 J&B>"s,
szText db 'Hello,world!',0 cC NyW2'
;代码段 k3 YDnMRA9
.code KKCzq
|
start: {mkD{2)KQ
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Oi?+Z:lak
invoke ExitProcess,NULL }[$qn|
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> $4*wK@xu
end start .# Jusd
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AWK &f;<[_QI=
BEGIN { print "Hello, world!" } [myIcLp^aP
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BASIC y5p)z"
传统版BASIC(例如GWBASIC): "8NhrUX
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10 PRINT "Hello, world!" Z{MR#.I
20 END LGau!\
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或在提示符输入: (59u<F
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?"Hello, world!":END ]ZbZ]
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现代版BASIC(例如Quick BASIC): mBQp#-1\
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Print "Hello, world!" jNC@b>E?~
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以下的语句在Quick BASIC中同样有效: v
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? "Hello,world!" 03!!# 5iJ
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BCPL fx"~WeVcO
GET "LIBHDR" Yu`KHvur
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LET START () BE >$g+Gx\v4
$( G]$.bq[v
WRITES ("Hello, world!*N") vhEXtjL
$) ]9 ArT$
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Befunge ,lUroO^^
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