“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。 I*)eP||
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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》。 c'6$`nC
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以下是用不同语言写成的Hello World程序的几个例子: ?rH=< #@
Ada > 'KQL?!F
with Ada.Text_Io; use Ada.Text_Io; #8jH_bi
procedure Hello is \OXKK<^$uK
begin }GTy{Y*&
Put_Line ("Hello, world!"); 7dU7cc
end Hello; 0=J69Yd
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汇编语言 |tS~\_O/
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x86 CPU,DOS,TASM ?|9$o/Q}
MODEL SMALL MRHkQE+K@8
IDEAL P1l@K2r
STACK 100H `Lu\zR%<
}UWRH.;v
DATASEG eL!G, W
HW DB 'Hello, world!$' /C}fE]n{X
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CODESEG XUT\nN-N
MOV AX, @data L:F:ZOM6`
MOV DS, AX Wh>Y_ k
MOV DX, OFFSET HW 9qQFIw~S
MOV AH, 09H NeyGIEP
INT 21H /`Lki>"
MOV AX, 4C00H W\<5'9LNb
INT 21H y0'"
END w8g36v*+(u
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x86 CPU,GNU/Linux,NASM Z;mDMvIu (
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ZvO:!u0+"
;Enter this into "hello.asm" then type: uNY]%[AnJ
;"nasm -f elf hello.asm" ]H[FZY
;"ld hello.o -o hello"
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;"./hello" yMa5?]J
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section .data ;data section declaration T't^pO-`
msg db 'Hello World!',0AH v+=_
len equ $-msg ;string length J=U7m@))Y#
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section .text ;code section declaration b\\?aR
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global _start ;entry point (start of execution) vu.f B4
_start: mov edx,len ;string length KXFa<^\o
mov ecx,msg ;string start !<2*B^
mov ebx,1 ;file handle: stdout ':w6{b
mov eax,4 ;sys_write n%<.,(.(S
int 80h ;kernel system call zj;y`ENj
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mov ebx,0 ;return value ;SVF"Uo
mov eax,1 ;sys_exit i9M6%R1m}E
int 80h ;kernel system call m%E7V{t
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4"j5@bppJ
x86 CPU,Windows,MASM32 . yu
.386 LVLh&9
.model flat,stdcall MJXm7<(
option casemap:none o#wF/ I
;Include 文件定义 }Gz"og*8
include windows.inc {+t'XkA
include user32.inc ~ab"q%
includelib user32.lib oci-[CI,
include kernel32.inc 9HEc=,D|
includelib kernel32.lib 95wV+ q*
;数据段 %r!
.data T+4Musu{V
szCaption db 'A MessageBox!',0 j`'=K_+nU
szText db 'Hello,world!',0 W3 8=fyD
;代码段 \aUbBa%!
.code % NS]z ;G
start: +TAm9eDNV
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ?j0blXl
invoke ExitProcess,NULL (lPNMS|V
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 9au)K!hN
end start s_Dl8O4u
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AWK x{ZVq 4
BEGIN { print "Hello, world!" } u X0wg
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BASIC ;.:UfW
传统版BASIC(例如GWBASIC): @,aL'2G
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10 PRINT "Hello, world!" 3.d=1|E
20 END d=4MqX r
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或在提示符输入: "|Q&
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?"Hello, world!":END BS|-E6E<
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现代版BASIC(例如Quick BASIC): nC&rQQFF
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Print "Hello, world!" ?I@3`?'
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以下的语句在Quick BASIC中同样有效: In;z\"NN4
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? "Hello,world!" H*\ }W
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BCPL CWN=6(y
GET "LIBHDR" Y+=@5+G
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LET START () BE gCm?nb)
$( Xs`:XATb/
WRITES ("Hello, world!*N") ev guw*u
$) YHRI U Yd
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Befunge gaCGU<L
"!dlrow olleH">v ckP3[@Su {
, ca-n:1
^_@ u('OHPqq
0'~b<>G%
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Brainfuck Jb$z(?S
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< P`%ppkzV6
+++++++++++++++.>.+++.------.--------.>+.>. *HXq`B
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C {oJa8~P
#include <stdio.h> V[bc-m
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int main(void) k?8W2fC
{ IGqmH=-
printf("Hello, world!\n"); s,29_z7
return 0; Q.]
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} Q:MsD.
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C++ jI V? p
#include <iostream> /&|pXBY$;
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int main() LK%B6-;~-
{ =Ffq =<
std::cout << "Hello, world!" << std::endl; G_<[sMC8
return 0; ~^C7(g )
} g`6wj|@ =W
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C++/CLI s*X\%!l9
int main() &B85;
{ ii2Z}qe
System::Console::WriteLine("Hello, world!"); C}kJGi
} k:qou})#4
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C# (C Sharp) 9M=K@a
class HelloWorldApp c\'pA^m6
{ 8{l=`y"nB
public static void Main() .0-m=3mp2
{ ykeUS
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System.Console.WriteLine("Hello, world!"); ? 7EVmF
} d&u/7rm
} 4a |Fx
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COBOL Iz8^?>X
IDENTIFICATION DIVISION. !U!E_D.O
PROGRAM-ID. HELLO-WORLD. 2"'8x?.V
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ENVIRONMENT DIVISION. Os!22 O
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DATA DIVISION. S}f<@-16P
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PROCEDURE DIVISION. 11T\2&Q
DISPLAY "Hello, world!". A(p
STOP RUN. -8jqC6mQ
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Common Lisp fYjsSUnf
(format t "Hello world!~%") ]."c4S_)|
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DOS批处理 NGs9Jke2
@echo off =eoxT
echo "Hello, world!" N6[^62
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Umt ia~x=&
Eiffel LD~'^+W
class HELLO_WORLD }gi'%e
cZzZNGY^ts
creation r3_gPK
make Z+W&C@Uw
feature ^ks^9*'|j
make is =ol][)Bd
local Kc\'s65.]
io:BASIC_IO {:X];A$
do #jx?uS
!!io * _lo;
io.put_string("%N Hello, world!") X4G55]D$>
end -- make %Nl(Y@dD*
end -- class HELLO_WORLD y;Ln ao7i
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Erlang 8#u_+;,p
-module(hello). walRqlo@
-export([hello_world/0]). UeMe4$m
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hello_world() -> io:fwrite("Hello, World!\n"). 7NC8<