“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。 ($pN OGH
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 _kg<KD=P
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以下是用不同语言写成的Hello World程序的几个例子: @a$_F3W
Ada LmWZ43Z"@
with Ada.Text_Io; use Ada.Text_Io; Kkcb'aDR
procedure Hello is m!Cvd9X=
begin }Go?j#
!
Put_Line ("Hello, world!"); d,8L-pT$FM
end Hello; t(AW2{%}
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汇编语言 e=Ko4Ao2y
<`rmQ`(}s
x86 CPU,DOS,TASM %A64AJZ
MODEL SMALL KSDz3qe
IDEAL ~"|MwR!0
STACK 100H `?E|frz[
`?f6~$1
DATASEG +O"!*
HW DB 'Hello, world!$' Zgy~Y0Di
_N)/X|=~s
CODESEG tg-U x
MOV AX, @data IJa6W`}
MOV DS, AX fGjYWw
MOV DX, OFFSET HW q)te/J@
MOV AH, 09H i^T@jg+K
INT 21H D+m#_'ocL
MOV AX, 4C00H _/V<iv
INT 21H (KxI*
END C# zYZ JZ
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2 tD{c^
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x86 CPU,GNU/Linux,NASM jV{?.0/h|
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). |?v(?
;Enter this into "hello.asm" then type: !z?&
;"nasm -f elf hello.asm" Voy1
;"ld hello.o -o hello" 6$/Z.8
;"./hello" C0C2]xx{
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section .data ;data section declaration
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msg db 'Hello World!',0AH dhrh "x_?:
len equ $-msg ;string length b3.
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section .text ;code section declaration E$SYXe [,
global _start ;entry point (start of execution) 2_T2?weD5
_start: mov edx,len ;string length Ig&H0S
mov ecx,msg ;string start WbJ|]}hJ\
mov ebx,1 ;file handle: stdout pPL)!=o!
mov eax,4 ;sys_write HQ /D )D
int 80h ;kernel system call 4g4[n7
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mov ebx,0 ;return value gy5 ^JL
mov eax,1 ;sys_exit GmhfBW?
int 80h ;kernel system call P* X^)R
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x86 CPU,Windows,MASM32 n( RQre
.386 `PY=B$?{4
.model flat,stdcall FEY_(70
option casemap:none [=<vapZt
;Include 文件定义 uA-1VwW+N
include windows.inc S)LvYOOB@
include user32.inc nA*Udrcn
includelib user32.lib 4y*"w*L
include kernel32.inc '+EtnWHs
includelib kernel32.lib (aC~0
#4
;数据段 `D/<*e,#
.data W&~\@j]!D
szCaption db 'A MessageBox!',0 =[JstiT?E
szText db 'Hello,world!',0 l XpbAW
;代码段 uB=DC'lkg
.code t=nZ1GZyM
start: |j}D2q=
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK b :WA}x V
invoke ExitProcess,NULL k3(q!~a:.}
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> QmgO00{
end start lA{JpH_Y8s
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AWK MO^Q 8v
BEGIN { print "Hello, world!" } ^>wlj
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BASIC *@I/TX'\rY
传统版BASIC(例如GWBASIC): *{:Zdg'~E
5GK> ~2c(
10 PRINT "Hello, world!" 'XJqh|G
20 END LZtO Q__B)
&|-jU+r}B
或在提示符输入: ?B+]Ex(\B,
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?"Hello, world!":END d\ I6Wn
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现代版BASIC(例如Quick BASIC): GIb,y,PDB
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Print "Hello, world!" e0<Wed
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以下的语句在Quick BASIC中同样有效: F MX^k
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? "Hello,world!" |A.nP9 hW
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BCPL :F8h}\a*
GET "LIBHDR" \G0YLV~>P
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LET START () BE {uDH-b(R
$( qTrM*/m:]L
WRITES ("Hello, world!*N") 8-_atL
$) .],:pL9d
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Befunge B/*\Ih9y
"!dlrow olleH">v s
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, 8e5imei
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