“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。 4'Potv@/
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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》。 U\s.fIr
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以下是用不同语言写成的Hello World程序的几个例子: 6Q"fRXM
Ada Gx,<|v
with Ada.Text_Io; use Ada.Text_Io; 7A<X!a
procedure Hello is "**Tw'
begin F-D9nI4{X
Put_Line ("Hello, world!"); Py_yIwQqg
end Hello; `O/1aW1
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0g o{gUI
汇编语言 14Y_ oH9
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x86 CPU,DOS,TASM ~
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MODEL SMALL BE>^;` K
IDEAL
td@I ;d2
STACK 100H 3k3-Ts
d< j+a1&
DATASEG }Vjg>"
HW DB 'Hello, world!$' @{n"/6t
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CODESEG RrA9@95+
MOV AX, @data O*jTrZ(k
MOV DS, AX (
y0
MOV DX, OFFSET HW h9-^aB$8^
MOV AH, 09H 5 6w6=Is
INT 21H /u?ZwoTzY
MOV AX, 4C00H v,,
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INT 21H ,6@s N'c
END %dn!$[D@
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x86 CPU,GNU/Linux,NASM 7n}$|h5D
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). f"9aL= 3
;Enter this into "hello.asm" then type: 2PZ#w(An&
;"nasm -f elf hello.asm" S*PcK>
;"ld hello.o -o hello" bAOL<0RS9`
;"./hello" 5NGQWg
X/Sp!W-H
section .data ;data section declaration [L(qrAQ2|z
msg db 'Hello World!',0AH ^`iqa-1
len equ $-msg ;string length ^jhc(ZW"
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section .text ;code section declaration g&&-
global _start ;entry point (start of execution) 9 n0?0mk
_start: mov edx,len ;string length ?$$Xg3w_#
mov ecx,msg ;string start -,:^dxE'
mov ebx,1 ;file handle: stdout }ZqnsLu[)
mov eax,4 ;sys_write b,h@.s
int 80h ;kernel system call }jdMo83
@qUgp*+{
mov ebx,0 ;return value +-2W{lX
mov eax,1 ;sys_exit '<=77yDg
int 80h ;kernel system call )>"|<h.2]
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x86 CPU,Windows,MASM32 d%,@,>>)
.386 uE &/:+
.model flat,stdcall ?COLjk
option casemap:none zy'e|92aO
;Include 文件定义 E5iNuJj=f
include windows.inc -sqd?L.p
include user32.inc .o#A(3&n
includelib user32.lib _|jEuif
include kernel32.inc ZX0#I W
includelib kernel32.lib @js`$
;数据段 SL[ EOz#
.data dp}s]`x+
szCaption db 'A MessageBox!',0 zQ~N(Jj?h
szText db 'Hello,world!',0 ~~r7TPq
;代码段 GHWt3K:*w
.code @b&_xT
start: :@@aIFRv
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ]621Z1
invoke ExitProcess,NULL (l+0*o,(
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> dD351!-
end start b9R0"w!ml
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AWK YQ|o0>
BEGIN { print "Hello, world!" } e+~@"^|
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BASIC ~e<^jhpJ
传统版BASIC(例如GWBASIC): 9y}/ G
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10 PRINT "Hello, world!" !&adO,jN+=
20 END %`bn=~T^
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或在提示符输入: )tm%0z7R
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?"Hello, world!":END }v xRjO,
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现代版BASIC(例如Quick BASIC): @rP#ktz]
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= 'AI
Print "Hello, world!" hG2WxYk
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以下的语句在Quick BASIC中同样有效: 5fq4[a
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? "Hello,world!" H0\', X
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BCPL MK.TBv
GET "LIBHDR" )8E[xBaO
8;d./!|'&g
LET START () BE bjBXs;zr@\
$( ThY\K>@]
WRITES ("Hello, world!*N") )i"52!
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Befunge kq*IC&y
"!dlrow olleH">v weMufT
, KBDNK_7A
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yu}T><Wst
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Brainfuck 5mX"0a_Q
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< T"DG$R,Aj
+++++++++++++++.>.+++.------.--------.>+.>. $\#wsI(
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C NC3XJ
4
#include <stdio.h> A;TNR
=j%ORD[
int main(void) O[8wF86R
{ )}J}d)
printf("Hello, world!\n"); TB_OFbI2
return 0; ; EsfHCi)
} &`}d;r|yn1
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C++ <9[>+X
#include <iostream> #Cb~-2:+7
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int main() 734H{,~
{ ~H4Tr[8a
std::cout << "Hello, world!" << std::endl; p#N2K{E
return 0; ~
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} IN@ =UAc&
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C++/CLI K_Kz8qV.?
int main() &x3R+(H {
{ 1QbD]"=n
System::Console::WriteLine("Hello, world!"); Ow{NI-^K
} S" PJ@E}^E
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C# (C Sharp) &23{(]eO
class HelloWorldApp geNvp0
{ V8G.KA "
public static void Main() ~3$:C#"Dl
{ be]Zx`)k
System.Console.WriteLine("Hello, world!"); gWl49'S>+
} #.2} t0*]5
}
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COBOL z>HM$n`YD
IDENTIFICATION DIVISION. ^qtJcMK+hq
PROGRAM-ID. HELLO-WORLD. [M?&JA