“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。 ,H\EPmNHK
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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》。 JT, 8/o
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以下是用不同语言写成的Hello World程序的几个例子: ~8RN
Ada (Z;-u+ }.
with Ada.Text_Io; use Ada.Text_Io;
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procedure Hello is O$LvHv!
begin [@_}BZk
Put_Line ("Hello, world!"); ! ai, \
end Hello; ;)~loa1\
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汇编语言 G)M9to
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x86 CPU,DOS,TASM *h$Z:p-g
MODEL SMALL aB+Ux<
-
IDEAL PJsiT4<
STACK 100H },ef(
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DATASEG ?,O{,2}
HW DB 'Hello, world!$' D*I%=);B_
6m|j "m
CODESEG Ft#d&
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MOV AX, @data <9B\('
MOV DS, AX hj4Kv
MOV DX, OFFSET HW u+~Ta
MOV AH, 09H p{[Ol
INT 21H *O+G}_}
MOV AX, 4C00H
/MO|q
INT 21H gyondcF
END 1zl6Rwk^o
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;3-5U&Axt
x86 CPU,GNU/Linux,NASM Re0ma%~LP
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ECWn/4Aws
;Enter this into "hello.asm" then type: M`-.0
;"nasm -f elf hello.asm" cF7I
;"ld hello.o -o hello" m\)z& hv<r
;"./hello" #%rXDGDS
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section .data ;data section declaration c~K^ooS-
msg db 'Hello World!',0AH PTXy:>]M
len equ $-msg ;string length TLU^ad#9E
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section .text ;code section declaration h S/oOeG<Y
global _start ;entry point (start of execution) 6Xu8~%i
_start: mov edx,len ;string length uhz:G~x!
mov ecx,msg ;string start b)tvXiO1>
mov ebx,1 ;file handle: stdout 3i/$YX5@
mov eax,4 ;sys_write <b~KR8
int 80h ;kernel system call %qfql
mx y>
mov ebx,0 ;return value zB kS1qMn
mov eax,1 ;sys_exit Q-k{Lqa-
int 80h ;kernel system call mFC0f?nr
ggR@& \
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x86 CPU,Windows,MASM32 C0eP/d
.386 _@3@_GE
.model flat,stdcall nlQ<Aa-%
option casemap:none C0|<+3uND=
;Include 文件定义 '5\7>2fI
include windows.inc @kw#\%Uz
include user32.inc 7@NAky(
includelib user32.lib 7aUk?Hf
include kernel32.inc {+_pyL
includelib kernel32.lib ^Qt4}V=
;数据段 AL74q[>
.data .H
{
szCaption db 'A MessageBox!',0 EbZRU65J}O
szText db 'Hello,world!',0 Sp3?I2 o
;代码段 Av:5v3%
.code {{7%z4l
start: %]S~PKx
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 2It$ bz
invoke ExitProcess,NULL _h",,"p#o
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> g}
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end start sDL@e33Yb
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BEGIN { print "Hello, world!" } |!NKKvf
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BASIC tkx1iBW=
传统版BASIC(例如GWBASIC): ;3wj(o0
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10 PRINT "Hello, world!" # Y/.%ch.
20 END FTZ][
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或在提示符输入: ~GZ!;An
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?"Hello, world!":END RG1~)5AL~Y
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现代版BASIC(例如Quick BASIC): (;T$[ru`
!{tkv4
Print "Hello, world!" ,y@`wq>O
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以下的语句在Quick BASIC中同样有效: <8nl}^d5
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? "Hello,world!" %y;E1pva
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BCPL 3)ac
GET "LIBHDR" Z".mEF-b
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LET START () BE 9N5ptdP.d
$( SA@MJ>Z
WRITES ("Hello, world!*N") 02OL-bv}HS
$) -7\Rl3c
SEsc"l8
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Befunge R
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"!dlrow olleH">v Rd7[e^HSN
, <20rxOEnf
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!pY=\vK;
Brainfuck cz<8Kb/XV
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+++++++++++++++.>.+++.------.--------.>+.>. GjlA\R^e
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