“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。 s( 2=E|
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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》。 M}/%t1^g:
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以下是用不同语言写成的Hello World程序的几个例子: ?CL1^N%
Ada -aKL
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with Ada.Text_Io; use Ada.Text_Io; }u:^ Mz
procedure Hello is Mr/^V,rA
begin }wj*^>*
Put_Line ("Hello, world!"); 3=sA]j-+(
end Hello; V/>SjUNq
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汇编语言 pN4!*7M
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x86 CPU,DOS,TASM Nk}Hvg*(
MODEL SMALL A(;J
IDEAL Qpf BM
STACK 100H (IJf2
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DATASEG _2f}WY3S
HW DB 'Hello, world!$' },[S 9I`p
h/-7;Csv
CODESEG kFD-
MOV AX, @data \EB]J\x<
MOV DS, AX fp12-Hk ~
MOV DX, OFFSET HW -b)p6>G-C
MOV AH, 09H 2Ni{wg"
INT 21H ufEt"P-X.
MOV AX, 4C00H -uO< ]
INT 21H _eO+O=j_x
END b'vJPv~hI
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x86 CPU,GNU/Linux,NASM <w{W1*R9
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). U@Aq@d+n
;Enter this into "hello.asm" then type: :GL|:
;"nasm -f elf hello.asm" @J"
} ~Y
;"ld hello.o -o hello" <JZ=K5
;"./hello" mO> [kb"V'
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section .data ;data section declaration T("Fh}
msg db 'Hello World!',0AH )](8{}wo
len equ $-msg ;string length `4;<\VYCr
\ 0<e#0-V
section .text ;code section declaration 0Vy*
0\{S
global _start ;entry point (start of execution) \I'A:~b)L
_start: mov edx,len ;string length %R&3v%$y*
mov ecx,msg ;string start 8
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mov ebx,1 ;file handle: stdout .iew5.eB+
mov eax,4 ;sys_write \dufKeiS&a
int 80h ;kernel system call /=7 |FtB`
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mov ebx,0 ;return value *j<;;z-
mov eax,1 ;sys_exit \V:
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int 80h ;kernel system call mT-5Ok&TUe
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x86 CPU,Windows,MASM32 Y6{p|F?&"
.386 DlIfr6F
.model flat,stdcall ,LzS"lmmo
option casemap:none )(DV~1r=
;Include 文件定义 Jw
{:1
include windows.inc ?0_i{BvN
include user32.inc sBSBDjk[
includelib user32.lib \vm'D'9
include kernel32.inc dm,b ZHo
includelib kernel32.lib !uHI5k,f
;数据段 VQo7se1P
.data %Yd}},X_E
szCaption db 'A MessageBox!',0 a o7|8[
szText db 'Hello,world!',0 ~r=TVHjqi
;代码段 );Gt!]p`;
.code >Zmpsa+
start: .!9]I'9M
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK " _q5\]z\O
invoke ExitProcess,NULL IOmIkx&`GP
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> yUH8
end start L<Lu;KnY6
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AWK K"=v|a.
BEGIN { print "Hello, world!" } Tmw
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BASIC MGmtA(
传统版BASIC(例如GWBASIC): E+ 7S:B
~CM{?{z;
10 PRINT "Hello, world!" h+*
20 END T-5T`awf
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或在提示符输入: Fg,[=CqB[
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?"Hello, world!":END wh~~g
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现代版BASIC(例如Quick BASIC): (bBetX
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Print "Hello, world!" h_A}i2/{
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以下的语句在Quick BASIC中同样有效: G:@gO2(D
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? "Hello,world!" ^ePSI|EW
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BCPL 5`z{A
GET "LIBHDR" }RoM N$r
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LET START () BE x]{h$yI
$( L g%cVSz/C
WRITES ("Hello, world!*N") iSsy_ |
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Befunge |]`+@K,S
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+++++++++++++++.>.+++.------.--------.>+.>. WQ*$y3%
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C rg P$\xn-
#include <stdio.h> Az.Y-O<$\
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int main(void) i;\i4MT
{ =a {Z7W
printf("Hello, world!\n"); Lv_6Mf(
return 0; :#gz)r
} x/4lD}Pw]
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C++ Cu`ZgKLQ
#include <iostream> xpS#l"dr
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int main() .<j8>1
{ Dgkt-:S/T|
std::cout << "Hello, world!" << std::endl; t>25IJG
return 0; Sqb#U{E
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C++/CLI HQE#O4
int main() !~mN"+u&
{ yx}:Sgv%
System::Console::WriteLine("Hello, world!"); -9Can4
} k(7!W
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C# (C Sharp) zcNV<tx
class HelloWorldApp oZ8SEC"]
{ *3k~%RM%?
public static void Main() xQD#;
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{ `n %~#TJ
System.Console.WriteLine("Hello, world!"); JRo{z{!O6
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COBOL gWlmQl
IDENTIFICATION DIVISION. wWm#[f],?
PROGRAM-ID. HELLO-WORLD. /qp`xJ
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ENVIRONMENT DIVISION. f{)*"
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DATA DIVISION. iFHVr'Og'
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PROCEDURE DIVISION. SKS[Lf
DISPLAY "Hello, world!". 7;_5[_
STOP RUN. Ft|a/e
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NT-du$!u
Common Lisp :N[2*.c[
(format t "Hello world!~%") OC[a?#R1
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DOS批处理 oFsMQ Py
@echo off !sLn;1l
echo "Hello, world!" 'shOSB
/R,/hiKx\
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Eiffel 7O{\^Jz1
class HELLO_WORLD O+e8}Tmm
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creation ?ph"|LyL
make ;m&f Vp
feature #._!.P
make is ZWr\v!4
local cg$~.ytPK
io:BASIC_IO Y6CadC
do /TB_4{
!!io PEBQ|k8g&
io.put_string("%N Hello, world!") f{+8]VA
end -- make z1L.
end -- class HELLO_WORLD %d=-<EQ|&
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