“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。 5)V]qV$
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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》。 q]:+0~cz
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以下是用不同语言写成的Hello World程序的几个例子: f2[z)j7
Ada OTd=(dwh
with Ada.Text_Io; use Ada.Text_Io; |s|>46E
procedure Hello is !Jb?rSJ.h
begin 4?M=?K0
Put_Line ("Hello, world!"); O;
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end Hello; 94I8~Jj4
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汇编语言 '[JrP<~^o
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x86 CPU,DOS,TASM 7;KmJ}$
MODEL SMALL |Z6rP-
IDEAL T
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STACK 100H $f>Mz|j
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DATASEG ^te9f%>$l
HW DB 'Hello, world!$' m}6GVQ'Q
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CODESEG Zb-TCS+3l
MOV AX, @data &9PzBc
MOV DS, AX xuO5|{h
MOV DX, OFFSET HW N-jFA8n
MOV AH, 09H !Qrlb>1z-
INT 21H MdU_zY(c
MOV AX, 4C00H gj\r>~S
INT 21H B$g!4C
`g
END ~b5aT;ObR
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x86 CPU,GNU/Linux,NASM >!E:$;i@
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). /7|u2!#Ui
;Enter this into "hello.asm" then type: 7~cN
;"nasm -f elf hello.asm" 9cFFQM|o
;"ld hello.o -o hello" ~^"
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;"./hello" X1:|
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section .data ;data section declaration zF<*h~
msg db 'Hello World!',0AH xZtA) Bp
len equ $-msg ;string length 82Nh;5Tr
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section .text ;code section declaration $ePAsJ
global _start ;entry point (start of execution) c;w
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_start: mov edx,len ;string length Y%p"RB[
mov ecx,msg ;string start tbAN{pX
mov ebx,1 ;file handle: stdout go6Hb>
mov eax,4 ;sys_write ^w^cYM,
int 80h ;kernel system call B^U5=L[:p
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mov ebx,0 ;return value s
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mov eax,1 ;sys_exit zdyS"H}
int 80h ;kernel system call 6h}f^eJ:K,
:
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x86 CPU,Windows,MASM32 [sFD-2y
.386 ZNFn^iuQ
.model flat,stdcall \`{ YqO T
option casemap:none >~TLgq*
;Include 文件定义 XIJ>\ RF
include windows.inc j !&g:{ e
include user32.inc 0Z2![n
includelib user32.lib V5K`TC^
include kernel32.inc Kx*;!3-V$
includelib kernel32.lib W=mh*G3y
;数据段 W3{k{~
.data yXc/Nl%
szCaption db 'A MessageBox!',0 :2 ?dl:l
szText db 'Hello,world!',0 $Xk1'AzB8
;代码段 )eY3[>`
.code cliP+#
start: p8[Z/]p
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK L\nWhmwl
invoke ExitProcess,NULL b,D+1'
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end start Sq-mH=rs]
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AWK _R]la&^2F\
BEGIN { print "Hello, world!" } rxIfatp^
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BASIC vNd4Fn)H
传统版BASIC(例如GWBASIC): \W(C=e
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10 PRINT "Hello, world!" 6~&4>2b0f
20 END +aEE(u6%E@
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或在提示符输入: MJ8z"SKnV
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?"Hello, world!":END \2:
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现代版BASIC(例如Quick BASIC): I Vq9z
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Print "Hello, world!" @/`b:sv&*
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以下的语句在Quick BASIC中同样有效: [US.n+G6
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? "Hello,world!" ;l &mA1+
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BCPL KFLIO>hE
GET "LIBHDR" F,P,dc
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LET START () BE .?[2,4F;
$( ^B1Q";#
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WRITES ("Hello, world!*N") +*DXzVC
$) B+*F?k[
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zRD{"uqi
Befunge z4&|~-m,
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Brainfuck F9]GEBLr
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C G;yf]xFd
#include <stdio.h> p3\F1]( Z
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int main(void) /V2Ih
{ {Tm31f(oD
printf("Hello, world!\n"); ?r'rvu'/
return 0; egYJ.ZzF0
} b=wc-nA
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C++ w=rh@S]
#include <iostream> 2Rc#{A
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int main() ("}TW-r~
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