“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。 w$*t.Q*
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将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 |5SYKA7CS
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以下是用不同语言写成的Hello World程序的几个例子: 6=]%Y
Ada <,,U>0?3
with Ada.Text_Io; use Ada.Text_Io; K,YKU?z6
procedure Hello is AF5.gk=
begin 0(VQwGC[
Put_Line ("Hello, world!"); #;'1aT
end Hello; uY;-x~Z
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汇编语言 F|X-|Co
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x86 CPU,DOS,TASM Fs7/3
MODEL SMALL @W|}|V5
IDEAL D,+I)-k<
STACK 100H `zAo IQ
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DATASEG v"Bv\5f,Ys
HW DB 'Hello, world!$' ZWW:-3
4f~hd-z
CODESEG ^1U2&S
MOV AX, @data & v=2u,]T
MOV DS, AX |r5|IA
MOV DX, OFFSET HW Kx 6_Vp
MOV AH, 09H SE{$a3`UzP
INT 21H pdsjX)O+f
MOV AX, 4C00H ~DcX}VCm
INT 21H o<loc Z
END 7,ODh-?ez
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x86 CPU,GNU/Linux,NASM R%XbO~{u
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). HS| &["
;Enter this into "hello.asm" then type: 68R[Lc9q5
;"nasm -f elf hello.asm" [Fe`}F}Co8
;"ld hello.o -o hello" waXA%u50
;"./hello" G}mJtXT#=
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section .data ;data section declaration p_=^E*J]
msg db 'Hello World!',0AH YD$fN"}-
len equ $-msg ;string length ;7&RmIXKh'
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section .text ;code section declaration 4`)B@<
global _start ;entry point (start of execution) XbYW,a@w2
_start: mov edx,len ;string length v#:#w.]-Y
mov ecx,msg ;string start YSk,kU
mov ebx,1 ;file handle: stdout <T:u&Ic
mov eax,4 ;sys_write OUn,URI
int 80h ;kernel system call f;#hcRSH
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mov ebx,0 ;return value u!mUUFl
mov eax,1 ;sys_exit u*Eb4
int 80h ;kernel system call /r Zj=
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x86 CPU,Windows,MASM32 h9LA&!
.386 %1a\"F![
.model flat,stdcall -uenCWF\#
option casemap:none r8+{HknB;
;Include 文件定义 #Zk6
include windows.inc i;`rzsRb
include user32.inc e m<(wJ-Y
includelib user32.lib U,Nf&g
include kernel32.inc TIlcdpwXf
includelib kernel32.lib lM"@vNgK
;数据段 &H;0N"Fn
.data e?3 S0}
szCaption db 'A MessageBox!',0 '>_'gR0O
szText db 'Hello,world!',0 HE.
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;代码段 t.c XrX`k
.code eiI}:5~
/g
start: #A@*k}/+
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK "'-f?kZ
invoke ExitProcess,NULL JadXd K=gE
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> &V$_u#<
end start yb56nd
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BEGIN { print "Hello, world!" } V9NE kS
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BASIC ]wWN~G)2lV
传统版BASIC(例如GWBASIC): `omZ'n)
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10 PRINT "Hello, world!" #g\O*oYaw
20 END pJ"Wg@+
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或在提示符输入: 5Q,#Co
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?"Hello, world!":END >`Gys8T
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现代版BASIC(例如Quick BASIC): Q3u
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Print "Hello, world!" \ $}^u5Y
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以下的语句在Quick BASIC中同样有效:
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? "Hello,world!" ie{9zO<d
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GET "LIBHDR" 7'z{FSS
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LET START () BE \"{+J
$( k?3NF:Yy7
WRITES ("Hello, world!*N") d4t%/ Uh
$) }&Ngh4/
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w,> ceu/
Befunge "C&l7K;bp
"!dlrow olleH">v _Je<_pl!D
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Brainfuck s'qd%JxD
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C .(^KA{
#include <stdio.h> _TY9!:&}q
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int main(void) A-Be}A
{ 3&:Us|}
printf("Hello, world!\n"); 4qXO8T#~J=
return 0; -b"mx"'?
} 5RXZ$/
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