“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。 @lh]?|*[
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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》。 ^Vc(oa&;
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以下是用不同语言写成的Hello World程序的几个例子: RWJyd=
Ada 9:E.Iy
with Ada.Text_Io; use Ada.Text_Io; 4a.8n!sys
procedure Hello is \y7\RV>>3b
begin Oo>Uu{{
Put_Line ("Hello, world!"); Jep/%cT$w
end Hello; C,<FV+r=^
kp)1s>c
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汇编语言 ,x[~|J!
X:(t,g*7
x86 CPU,DOS,TASM iE
,"YCK
MODEL SMALL P}!pmg6V
IDEAL /(}YjeS
STACK 100H NZXCaciG
g- INhzMu
DATASEG 7Mh!@Rd_V
HW DB 'Hello, world!$' ]0}NF
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CODESEG +' .o
MOV AX, @data bWZzb&
MOV DS, AX eQ=6< ^KZ
MOV DX, OFFSET HW 9A\\2Zz6F
MOV AH, 09H AC?a:{./
INT 21H ]==S?_.B3n
MOV AX, 4C00H {'?PGk%v
INT 21H y]ya.YG
END *44E'Dxv
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x86 CPU,GNU/Linux,NASM S'IQbHz*
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 'f7s*VKG
;Enter this into "hello.asm" then type: Ui"3'OU'
;"nasm -f elf hello.asm" i)]^b{5nyB
;"ld hello.o -o hello" 9N<TJp,q
;"./hello" H"pwIiC
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.#0
section .data ;data section declaration _+0c<'
msg db 'Hello World!',0AH Z,,q mwd
len equ $-msg ;string length u6*0%
Km
~(.&nysZ-
section .text ;code section declaration GM0pHmC
global _start ;entry point (start of execution) t RTJ Q
_start: mov edx,len ;string length 0 \o5+
mov ecx,msg ;string start YJZ`Clp?
mov ebx,1 ;file handle: stdout AnBD~h h
mov eax,4 ;sys_write +3R/g@n
int 80h ;kernel system call W)odaab7
u&o<>d;)
mov ebx,0 ;return value bI)%g
mov eax,1 ;sys_exit {>X2\.Rl
int 80h ;kernel system call v
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x86 CPU,Windows,MASM32 ^`9O$.'@
.386 . H8 6f !=
.model flat,stdcall A] f^9F@
option casemap:none H+N6VVnO
;Include 文件定义 wJWofFz
include windows.inc B(R$5Xp
include user32.inc 9Om3<der
includelib user32.lib 6[a;83
include kernel32.inc mk3,ke8
includelib kernel32.lib 9H
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;数据段 :-T[)Q+-3
.data +,4u1`c|$
szCaption db 'A MessageBox!',0 ^
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szText db 'Hello,world!',0 QM=Y}
;代码段 '#612iZo
.code 6J3<k(#:
start: 'u:J
"
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 8+&Da
invoke ExitProcess,NULL 6dqI{T-i?
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> FMqes5\ 3
end start jh~E!%d77
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AWK 'RIx}vPf
BEGIN { print "Hello, world!" } fRcy$
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hsZ@)[/:
BASIC f;3kYh^4
传统版BASIC(例如GWBASIC): kSjvY&n%
B[7Fq[.mh
10 PRINT "Hello, world!" m]ALW0
20 END uVZX53 ,g
Q.l3F3;
或在提示符输入: <s (o?U
WWVQJ{,}
?"Hello, world!":END A 1aN<!ehB
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现代版BASIC(例如Quick BASIC): ,y[w`Q\
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Print "Hello, world!" sl G%o5|m
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以下的语句在Quick BASIC中同样有效: XlxM.;i0H
wF{M"$am
? "Hello,world!" LcmZ"M6
VP6_}9:9
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Va^
BCPL H :`H4S}
GET "LIBHDR" ?H21Ru>:*
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LET START () BE F Xp_`9.zH
$( f.ws\^v%
WRITES ("Hello, world!*N") HurF4IsHk
$) nMH:7[x3
O?qM=W
8MBvp*
Befunge ?l](RI
"!dlrow olleH">v xPP]Ro PR
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^_@ 3q0S}<h al
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X;yThb`iI
Brainfuck dwUs[v
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+++++++++++++++.>.+++.------.--------.>+.>. z_nY>_L83*
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K5(:0Q.5y
C x UTlM
#include <stdio.h> r<