“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。 `g4Ekp'Rp[
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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》。 0x3 h8fs
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以下是用不同语言写成的Hello World程序的几个例子: Xa@ _^oL
Ada kb>Vw<NtE
with Ada.Text_Io; use Ada.Text_Io; :uU]rBMo
procedure Hello is [t"_}t =w
begin VrAXOUJw6
Put_Line ("Hello, world!"); 0,"n-5Im
end Hello; u@:=qd=\
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gr[ "A
汇编语言 N>cp>&jV
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x86 CPU,DOS,TASM }e/[$!35
MODEL SMALL vJ'yz#tl9
IDEAL 2heWE
STACK 100H _Gs
c*M)DO`y;h
DATASEG s$DT.cvO
HW DB 'Hello, world!$' K8yyxJ
w>9H"Q[
CODESEG Hd=D#u=A4{
MOV AX, @data @2%VU#!m
MOV DS, AX :Z*02JwK
MOV DX, OFFSET HW "S{6LWkD
MOV AH, 09H NejsI un%
INT 21H k #,Gfs
MOV AX, 4C00H w ufKb.4`
INT 21H i$fjr[$B
END 1S)0
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x86 CPU,GNU/Linux,NASM Rrs`h `'-
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). =JySY@?9
;Enter this into "hello.asm" then type: /RXk[m-
;"nasm -f elf hello.asm" om*tdG
;"ld hello.o -o hello" $Kw"5cm
;"./hello" %DND&0`
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section .data ;data section declaration yaYIgG
msg db 'Hello World!',0AH
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*G/F
len equ $-msg ;string length UtGd/\:
x#}j3"
PP
section .text ;code section declaration 2U+z~
global _start ;entry point (start of execution) :+gCO!9Y
_start: mov edx,len ;string length q*<J$PI
mov ecx,msg ;string start MSYLkQ}_b
mov ebx,1 ;file handle: stdout eqUn8<<s
mov eax,4 ;sys_write 0-&sJ
int 80h ;kernel system call fAY2V%Rft
jQK2<-HZ3
mov ebx,0 ;return value z*k3q`=>
mov eax,1 ;sys_exit v^lm8/}NO
int 80h ;kernel system call Y(G*Yi?;
1
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x86 CPU,Windows,MASM32 hF=V
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.386 (J,Oh
.model flat,stdcall h.s<0.
option casemap:none 45O6TqepN
;Include 文件定义 ^&G O4u
include windows.inc 9 (FcA5Y
include user32.inc ]a%\Q2[c
includelib user32.lib CDTk
include kernel32.inc Bc9|rl V,
includelib kernel32.lib xUYN\Pc-
;数据段 0or6_y6
.data h?pGw1Q
szCaption db 'A MessageBox!',0 1WA""yb
szText db 'Hello,world!',0 )>#<S0>'j
;代码段 RAx]Sp
Q-S
.code o y%g{,V
start: \Dsl7s=
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK as!|8JE`
invoke ExitProcess,NULL Kjca>/id
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> in;+d~?
end start `v/tf|v6
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AWK n4d(`
BEGIN { print "Hello, world!" } ~BYEeUo;%v
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BASIC Zs K'</7
传统版BASIC(例如GWBASIC): 0 *Yivx6
C6T 9
10 PRINT "Hello, world!" Om?:X!l"
20 END kp
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或在提示符输入: s)&R W#:X
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?"Hello, world!":END xzf)_ <
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现代版BASIC(例如Quick BASIC): |sZ9/G7
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Print "Hello, world!" 5bqYi
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以下的语句在Quick BASIC中同样有效: {Z~VO
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? "Hello,world!" V{aIhH>P
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P@T $6%~
BCPL /7HIL?r
GET "LIBHDR" Y<$"]@w
zZ"')+7q&%
LET START () BE wCE fR!i
$( N@`9 ~JS
WRITES ("Hello, world!*N") v_F?x!
$) FVLA^$5c
x?k |i}Q
nh.v?|
Befunge c$Nl-?W
"!dlrow olleH">v _q!ck0_
, B(vz$QE,$r
^_@ %$-3fj7
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Brainfuck [~r$US
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+++++++++++++++.>.+++.------.--------.>+.>. 6nk|*HPz
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C g8@i_
#include <stdio.h> [zt&8g
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int main(void) &(U=O?r7
{ KB-#):'
printf("Hello, world!\n"); HQ#L
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return 0; ha'm`LiX
} 7^}Z%c
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C++ X/D9%[{&
#include <iostream> Dg4^
C
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int main() RPqn#B
{ ZFw743G
std::cout << "Hello, world!" << std::endl; g<jK^\eW
return 0; -Y,Ibq
} 4'eVFu+62
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C++/CLI ^\t">NJ^
int main() .3SjkC4I
{ ]V7hl#VO
System::Console::WriteLine("Hello, world!"); *>H'@gS
} 4>eg@s N
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C# (C Sharp) 9jFDBy+
class HelloWorldApp |"&4"nwa
{ Olrw>YbW
public static void Main() ?fwr:aP~
{ ~9 nrS9)
System.Console.WriteLine("Hello, world!"); k5<