“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。 r
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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》。 |I]G=.*E
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以下是用不同语言写成的Hello World程序的几个例子: =f=>buD
Ada {JQV~rfh`
with Ada.Text_Io; use Ada.Text_Io; m,5m'9dj
procedure Hello is "V:RKH`
begin /.mx\_$
Put_Line ("Hello, world!"); |v>W
end Hello; N#OO{`":Z`
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汇编语言 (=%0x"'
s7`2ky()kz
x86 CPU,DOS,TASM _B&;z $
MODEL SMALL YqKQm+G
IDEAL !y1qd
STACK 100H Ux);~P`/o
ZjK'gu8*
DATASEG @gx]3t*]I
HW DB 'Hello, world!$' YFcMU5_F
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CODESEG !':y8(Ou
MOV AX, @data Q >h7H{c
MOV DS, AX 0 4ceDe
MOV DX, OFFSET HW !9S!zRy@
MOV AH, 09H y7b>>|C
INT 21H ,[| i^
MOV AX, 4C00H sEb*GF*.V
INT 21H lR
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END Y,KSr|vG
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uq!d8{IMu
x86 CPU,GNU/Linux,NASM 27JZwlzZ
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). i:R_g]
;Enter this into "hello.asm" then type: i1qmFvksl
;"nasm -f elf hello.asm" gE&83i"
;"ld hello.o -o hello" CTB
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;"./hello" 30cb+)h(
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section .data ;data section declaration 0#sf,ja>
msg db 'Hello World!',0AH bhjJH,%_>
len equ $-msg ;string length r*Z p-}
pr\OjpvD
section .text ;code section declaration +o6"Z)
global _start ;entry point (start of execution) I&&[ ':
_start: mov edx,len ;string length |3EKK:RE
mov ecx,msg ;string start uw&p)
mov ebx,1 ;file handle: stdout gr>>]C$
mov eax,4 ;sys_write C%P"\>5@
int 80h ;kernel system call x*_'uP oS
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mov ebx,0 ;return value lt C
mov eax,1 ;sys_exit >{h/4T@
int 80h ;kernel system call /a-OBU
7@!ne&8Z?
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x86 CPU,Windows,MASM32 %vWh1-
.386 #"JtH"pF
.model flat,stdcall !y;xt?
option casemap:none 35#"]l"
;Include 文件定义 C/z 0/mk
include windows.inc KupQtT<
include user32.inc {@67'jL
includelib user32.lib PAjH*5IA
include kernel32.inc 0e~4(2xK
includelib kernel32.lib Q$S|L C
;数据段 D14i]
.data qAVZ&:#
szCaption db 'A MessageBox!',0 Z&Z=24q_
szText db 'Hello,world!',0 w"FBJULzn9
;代码段 ^1+=HdN,
.code d/I*$UC
start: {dNWQE*\c
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK )WF*fcx{
invoke ExitProcess,NULL KZsJ_t++!W
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Ei\tn`I&
end start ^s3 SzB@
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BEGIN { print "Hello, world!" } -*0U&]T
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BASIC vt2A/9_Z%
传统版BASIC(例如GWBASIC): j
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10 PRINT "Hello, world!" kKNrCv@64d
20 END 6tT*b@/_o
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或在提示符输入: E<4'4)FHuQ
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?"Hello, world!":END ^U{SUWl
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现代版BASIC(例如Quick BASIC): =7%c*O <
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Print "Hello, world!" \9jvQV/y
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以下的语句在Quick BASIC中同样有效: 5|bc*iqU
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? "Hello,world!" -x0u}I
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BCPL 8\_ YP3
GET "LIBHDR" #bdSH)V
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LET START () BE C\5"Kb
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WRITES ("Hello, world!*N") ZE0D=
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rh 7%<xb>
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Befunge LIMPW w g
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, Jz6zJKcA
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Brainfuck Ld:U~M-
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Ny)N
+++++++++++++++.>.+++.------.--------.>+.>. Ga#5xAI{a
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C $"6O92G(hJ
#include <stdio.h> 0l>4Umxr{J
#u<n .
int main(void) 5Uha,Q9SA
{ NE2P
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printf("Hello, world!\n"); ubQZTA x
return 0; }
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} c*HWH$kB
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C++ x72T5.
#include <iostream> ;ax%H @o
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int main() Sk|DVV$
{ !JWZ}uM6
std::cout << "Hello, world!" << std::endl; UbSAyf
return 0; JUlCj#%
} G [$u`mxV^
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C++/CLI h;?H4j
int main() 4<Q^/-W
{ Rx%SeM2
System::Console::WriteLine("Hello, world!"); ;<)<4N"
} )$7-CNWr~
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C# (C Sharp) :o+&>z
class HelloWorldApp 19.oW49Sw
{ < k?jt
public static void Main() W$ag
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{ Q/<