“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。 IR3SP[K"
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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》。 Ndl{f=sjX-
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以下是用不同语言写成的Hello World程序的几个例子: (D[~Z!
Ada i{N?Y0YQs0
with Ada.Text_Io; use Ada.Text_Io; 8h)7K/!\
procedure Hello is mI<s f?.
begin Xk!{UxQKQ
Put_Line ("Hello, world!"); 0x5\{f
end Hello; <WWZb\"{
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汇编语言 VFawASwQ
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x86 CPU,DOS,TASM !W,LG$=/
MODEL SMALL -wH0g^Ed
IDEAL %w>3Fwj`z
STACK 100H 61QA<Wb
A#']e 8
DATASEG 7)}_'p
HW DB 'Hello, world!$' j*gZvbO;'L
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CODESEG m["e7>9G
MOV AX, @data ;uc3_J]
MOV DS, AX @$kzes\
MOV DX, OFFSET HW a5m[
N'kah
MOV AH, 09H ?{ \7th37
INT 21H id+EBVHAd
MOV AX, 4C00H :I/9j=@1
INT 21H \kKd:C{
END wbr$w>n
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x86 CPU,GNU/Linux,NASM Ok)f5")N %
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). z@ZI$.w
;Enter this into "hello.asm" then type: J"h2"$v,
;"nasm -f elf hello.asm" 7gOu|t
;"ld hello.o -o hello" pk'd&.
;"./hello" uj\&-9gEi
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section .data ;data section declaration $<=d[6
msg db 'Hello World!',0AH 4gEw}WiP
len equ $-msg ;string length hFtjw6
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section .text ;code section declaration n>B
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global _start ;entry point (start of execution) HD{u#~8{
_start: mov edx,len ;string length pUmT?N!
mov ecx,msg ;string start .
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mov ebx,1 ;file handle: stdout Q~Nq5[
mov eax,4 ;sys_write ?HOnDw.v1
int 80h ;kernel system call U7/
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SR.xI:}4
mov ebx,0 ;return value G3!O@j!7w$
mov eax,1 ;sys_exit D|$0~1y
int 80h ;kernel system call ;H8`^;
DfGq m-c
Lwm /[
x86 CPU,Windows,MASM32 !]7b31$M_
.386 N`,,sw
.model flat,stdcall w(S&X"~
option casemap:none `'r~3kP*NT
;Include 文件定义 7)O+s/.P)
include windows.inc p]~PyzG!
include user32.inc Hsov0
includelib user32.lib KCbOO8cQS
include kernel32.inc ('uUf!h?\
includelib kernel32.lib P!j*4t
;数据段 l{?9R.L
.data |'o<w
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szCaption db 'A MessageBox!',0 2YQBw,gG
szText db 'Hello,world!',0 mW[w4J+7P
;代码段 IcqzMmb
.code @o}J )
start: 5>e<|@2
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invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK YsiH=x
invoke ExitProcess,NULL bs%
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> FB,rQ9D
end start s/>0gu]A8
./DlHS;
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AWK #ax% n
BEGIN { print "Hello, world!" } )eSQce7H
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BASIC
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传统版BASIC(例如GWBASIC): *\iXU//^)
#jxPh!%9
10 PRINT "Hello, world!" DBu8}2R
20 END *>EV4Hl
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或在提示符输入: r-WX("Vvh
2Z"\%ZD
?"Hello, world!":END I3Z\]BI
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现代版BASIC(例如Quick BASIC): %/nDG9l
k $ SMQ6
Print "Hello, world!" v3n
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以下的语句在Quick BASIC中同样有效: zw5Ol%JF
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? "Hello,world!" /{[tU-}qJ
hCX/k<}I
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BCPL u]9 #d^%V
GET "LIBHDR" o?= &kx
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LET START () BE qM
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$( zrE{CdG%y
WRITES ("Hello, world!*N") h<CRW-
$) OYa9f[ $
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*cXi*7|=
Befunge 6I_4{
"!dlrow olleH">v Y2ON!Rno
, v$;URF%^
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#include <stdio.h> Sq2 8=1%
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int main(void) u?z,Vs"
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