“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。 Haq23K
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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》。 >6jyd{
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以下是用不同语言写成的Hello World程序的几个例子: _@?]!J[
Ada w:z_EV!&
with Ada.Text_Io; use Ada.Text_Io; r'xa'6&
procedure Hello is -#rFCfPy^
begin &W.tjqmw
Put_Line ("Hello, world!"); 1(On.Y=
end Hello; ~)oC+H@{
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汇编语言 4~Lw:o1a
sI*( MhU
x86 CPU,DOS,TASM Z!LzyCVl
MODEL SMALL Szwa2IdI.
IDEAL mUnnk`v
STACK 100H yKDg
~zsh
Ix1ec^?f
DATASEG Zh3]bg5
HW DB 'Hello, world!$' 3bE^[V8/
VMHiuBz:
CODESEG $JX_e
MOV AX, @data }"q1B
MOV DS, AX 0qR;Z{k
MOV DX, OFFSET HW H~x0-q<8
MOV AH, 09H I>9rfmmTI
INT 21H ;Y K^&!N
MOV AX, 4C00H ;=B&t@
INT 21H v6oZD;;~
END Dk]Y\:
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x86 CPU,GNU/Linux,NASM
n-H0cm
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). H3`%#wQ0j
;Enter this into "hello.asm" then type: L6l~!bEc
;"nasm -f elf hello.asm" m#%5H
;"ld hello.o -o hello" ]!0*k#i_.
;"./hello" cC4*4bMm
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section .data ;data section declaration nNBxT+3*i
msg db 'Hello World!',0AH .bL{fBTT~
len equ $-msg ;string length G=~T)e
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section .text ;code section declaration wond>m
3
global _start ;entry point (start of execution) %o^'(L@z
_start: mov edx,len ;string length 6pr}A
mov ecx,msg ;string start OaU$ [Z'8
mov ebx,1 ;file handle: stdout &?zJ|7rh@|
mov eax,4 ;sys_write @iWIgL
int 80h ;kernel system call Q#:,s8TW[
To=1B`@-
mov ebx,0 ;return value v]_{oj_(-
mov eax,1 ;sys_exit puMpUY
int 80h ;kernel system call ';b/D
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QdDdrR^&
x86 CPU,Windows,MASM32 8iX?4qj{P
.386 N15{7,
.model flat,stdcall 1s!hl{n<~
option casemap:none H6'xXS
;Include 文件定义 QD"V=}'?
include windows.inc Q@]#fW\Y
include user32.inc M%9PVePOe
includelib user32.lib k}jH
include kernel32.inc ~!)_3o
includelib kernel32.lib : 2?i9F0_
;数据段 eJ7A.O
.data 3n6_yK+D
szCaption db 'A MessageBox!',0 *h-nI=
szText db 'Hello,world!',0 W.0dGUi*
;代码段 VQqEsnkz
.code UN,@K9
start: !7 *X{D v
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 4fpz;2%
invoke ExitProcess,NULL #( X4M{I
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> `<\AnhNW]I
end start T(3"bS.,
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BEGIN { print "Hello, world!" } Kr]F+erJe
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BASIC S=M$g#X`5
传统版BASIC(例如GWBASIC): &x;v&
<R]?8L0{h
10 PRINT "Hello, world!" fkk\Q>J9!=
20 END Is?0q@
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.
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或在提示符输入: trgj]|?M
DSET!F;PG
?"Hello, world!":END Kw-E%7gh4c
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现代版BASIC(例如Quick BASIC): W@pVP4F0xM
e ~*qi&,4
Print "Hello, world!" VN`2bp>5I
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以下的语句在Quick BASIC中同样有效: {\lu; b!
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? "Hello,world!" -?'u"*#1,
m=j7 vb
ds7I .Q'
BCPL uCUQxFp
GET "LIBHDR" ?~u"w OH'
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LET START () BE qZA?M=NT?
$( n |.- :Zy
WRITES ("Hello, world!*N") oLB pG1Va
$) WMl_$Fd6
$c f?`k
hq\KSFP
Befunge x"_f$,:!
"!dlrow olleH">v |
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, j+Wgjf
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Brainfuck yTbBYx9Bi
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< RwT.B+Onuy
+++++++++++++++.>.+++.------.--------.>+.>. d|DIqT~{W
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C cCWOGd
#include <stdio.h> -hhE`Y
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int main(void) Cg )#B+
{ %l3RM*zb
printf("Hello, world!\n"); ?mgr#UN
return 0; kZF\V7k
} 5F&i/8Ib
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C++ qY#*zx
#include <iostream> c|ZZ+2IYd
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int main() XTHrf'BU
{ 'KyT]OObS
std::cout << "Hello, world!" << std::endl; |oO0%#1H
return 0; bu@Pxz%_
} *GD 1[:
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C++/CLI 6^|bKoN/ f
int main() `qs'={YtU
{ F)v+.5T1
System::Console::WriteLine("Hello, world!"); ~oSLWA9
} cDE?X o'!
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C# (C Sharp) <*4=sX@
class HelloWorldApp {jlm]<