“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。 vTx2E6
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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》。 07^iP>?
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以下是用不同语言写成的Hello World程序的几个例子: 6'Worj
Ada %Va!\#
with Ada.Text_Io; use Ada.Text_Io; Yd~X77cv
procedure Hello is MfWyc_
begin suzZdkMA
Put_Line ("Hello, world!"); RpD=]y!5_
end Hello; 'GS"8w~j
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汇编语言 6U R2IxbE
70Wgg ty
x86 CPU,DOS,TASM qtQ6cqLd
MODEL SMALL WL?\5?G9l
IDEAL EH!
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STACK 100H `u
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DATASEG P<a)25be/
HW DB 'Hello, world!$' UZJCvfi
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CODESEG [8*jw'W|[
MOV AX, @data HV{wI1
MOV DS, AX )E-inHD /
MOV DX, OFFSET HW SfaQvstN
MOV AH, 09H \Ani}qQ%|
INT 21H K,:cJ
MOV AX, 4C00H ?7.7`1m!v
INT 21H /7|V+6jV
END AK*LyR?
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x86 CPU,GNU/Linux,NASM `\#B18eU
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). OHb[qX\
;Enter this into "hello.asm" then type: ?&63#B,iZ
;"nasm -f elf hello.asm" Rld!,t
;"ld hello.o -o hello" jU9$Ehg
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;"./hello" d9;g]uj`
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section .data ;data section declaration JNt^ (z
msg db 'Hello World!',0AH LE9(fe) fe
len equ $-msg ;string length > dI LF
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section .text ;code section declaration =F]FP5V
global _start ;entry point (start of execution) Q;43[1&3w
_start: mov edx,len ;string length }%'?p<^M
mov ecx,msg ;string start #xQr<p$L6
mov ebx,1 ;file handle: stdout (`c
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mov eax,4 ;sys_write JGsx_V1t
int 80h ;kernel system call X[PZg{
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mov ebx,0 ;return value !'&n-Q
mov eax,1 ;sys_exit WaVtfg$!
int 80h ;kernel system call *n 6s.$p)%
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x86 CPU,Windows,MASM32 HkUWehVm
.386 x7:s]<kE
.model flat,stdcall s;S?;(QI
option casemap:none LcSX *MC
;Include 文件定义 ES.fOdx
include windows.inc #\.,? A}9
include user32.inc K;>9ZZtl
includelib user32.lib )z73-M V"
include kernel32.inc )Ch2E|C?=8
includelib kernel32.lib 4'g;TI^
;数据段 ;#xmQi'`
.data kI
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szCaption db 'A MessageBox!',0 s.N7qO^:E
szText db 'Hello,world!',0 -@yh>8v
;代码段 aY'C%^h]
.code 5!DBmAB
start: 8\^}~s$$A
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK FbaEB RM
invoke ExitProcess,NULL n>+mL"hs
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> [F0s!,P
end start h]+C.Eqnt#
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BEGIN { print "Hello, world!" } DoJ\ q+
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BASIC A+SE91m
传统版BASIC(例如GWBASIC): SM0~fAtE
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10 PRINT "Hello, world!" M m[4yP%
20 END QMa;Gy
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或在提示符输入: <3xyjX'NE
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?"Hello, world!":END NO|KVZ~
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现代版BASIC(例如Quick BASIC): y4*U6+ #.
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Print "Hello, world!" T&%ux=Jt
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以下的语句在Quick BASIC中同样有效: YP.5fq:
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? "Hello,world!" mL{B!Q
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BCPL DF1I[b=]
GET "LIBHDR" @y='^DQ*
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LET START () BE B^j
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WRITES ("Hello, world!*N") biSz?DJ>
$) KNS.Nw7
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Befunge @x"0_Qw
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