“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。 xP5Z -eL
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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》。 RX,c 4;
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以下是用不同语言写成的Hello World程序的几个例子: _{mG\*q
Ada d$PQb9Q+f
with Ada.Text_Io; use Ada.Text_Io; Df}3^J~JX
procedure Hello is "[2D&\$
begin znNv;-q
Put_Line ("Hello, world!"); t}2M8ue(&
end Hello; VcORRUp
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汇编语言 _MzdbUb5,
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x86 CPU,DOS,TASM s%@HchZ 1
MODEL SMALL AxiCpAS;J
IDEAL tybM3VA
STACK 100H RO8]R2A
;s w3MRJ
DATASEG 7s2e>6Q[
HW DB 'Hello, world!$' ZnRE:=
ke5_lr(
CODESEG %VGQ{:
MOV AX, @data T#=&oy7
MOV DS, AX M<3m/l%`Y
MOV DX, OFFSET HW r=ht:+m
MOV AH, 09H cE3V0voSw1
INT 21H Y@'ahxF
MOV AX, 4C00H `E5vO1Pl
INT 21H csms8J
END 3.?B')
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x86 CPU,GNU/Linux,NASM
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;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). xi! R[xr1
;Enter this into "hello.asm" then type: {>zQW{!
;"nasm -f elf hello.asm" xwZ7I
;"ld hello.o -o hello" \:_!!
;"./hello" 5dEek7wnf
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section .data ;data section declaration K&%YTA
msg db 'Hello World!',0AH 9 p`|~^X
len equ $-msg ;string length r]O8|#P,Z$
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section .text ;code section declaration W*Ce1
global _start ;entry point (start of execution) ZsL-vlv
_start: mov edx,len ;string length Q=.j>aM+_
mov ecx,msg ;string start -LMO
f[v?
mov ebx,1 ;file handle: stdout
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mov eax,4 ;sys_write GFO(O
int 80h ;kernel system call #)28ESj
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mov ebx,0 ;return value 4e9'yi
mov eax,1 ;sys_exit !_LRuqQ?"
int 80h ;kernel system call D(^ |'1
~e R6[;
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x86 CPU,Windows,MASM32 F(+dX4$
.386 mc}r15:<
.model flat,stdcall YLe$Vv735
option casemap:none Mf.:y
;Include 文件定义 .[hbiv#
include windows.inc e(;nhU3a*,
include user32.inc I
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includelib user32.lib Zmr*$,v<y
include kernel32.inc sp&)1?!M
includelib kernel32.lib bx%P-r31
;数据段 .LEn~ 8
.data {-kV~p
szCaption db 'A MessageBox!',0 /b~|(g31"
szText db 'Hello,world!',0 4
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;代码段 ,L,?xvWG
.code zFGZ;?i
start: SBqx_4}
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK *<T,Fyc|
invoke ExitProcess,NULL K)8N8Js(
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 4f{(Scg
end start ]Qb85;0)
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AWK !mtX*;b(e
BEGIN { print "Hello, world!" } *Wmn!{\g
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BASIC _b1w<T
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传统版BASIC(例如GWBASIC): Bi|XdS$G
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10 PRINT "Hello, world!" D_4UM#Tw
20 END dr8`;$;G*
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或在提示符输入: qOd*9AS'|M
^GN |}W
?"Hello, world!":END 3~Vo]wv
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现代版BASIC(例如Quick BASIC): cWG?`6xU&
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Print "Hello, world!" Q g;?C
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以下的语句在Quick BASIC中同样有效: WQT;k0;T]
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? "Hello,world!" m?=9j~F*
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BCPL ;wkoQ8FD9
GET "LIBHDR" r]+N(&q
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LET START () BE =2yg:D
$( _N-JRM m<
WRITES ("Hello, world!*N") iSz?V$}?
$) 'aoHNZfxw
;'x\L<b/)
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Befunge MGzuQrl{H
"!dlrow olleH">v (o5+9'y"9
, h#iFp9N
^_@ ZT;:Hxv0N
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Brainfuck 0aS&!"o!
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+++++++++++++++.>.+++.------.--------.>+.>. *l-(tp5
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C #r4S%
#include <stdio.h> ihrl!A5
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