“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。 vXc<#X9
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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》。 qU"+0t4
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以下是用不同语言写成的Hello World程序的几个例子: j8lbn |.
Ada js{ RaR=
with Ada.Text_Io; use Ada.Text_Io; ]'"$qm:
procedure Hello is }&=C*5JN
begin 51~:t[N|
Put_Line ("Hello, world!"); @~"0|,6VC
end Hello; /as1
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汇编语言 3h4>edM
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x86 CPU,DOS,TASM Eq|_>f@@8
MODEL SMALL :S.0e
IDEAL L"IdD5`7T
STACK 100H rn(T
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[u<1DR
DATASEG ?xy~N?N
HW DB 'Hello, world!$' Q@2Smtu~c
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CODESEG +;vfn>^!b
MOV AX, @data /V,:gLpQ
MOV DS, AX 5[0n'uH
MOV DX, OFFSET HW wL:3RZB
MOV AH, 09H "Li"NxObCA
INT 21H 4h-y'&Z
MOV AX, 4C00H ]g:VvTJ;?
INT 21H -gzk,ymp
END mX
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x86 CPU,GNU/Linux,NASM #SO9e.yhI
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). y0Ag px
;Enter this into "hello.asm" then type: (|S e+Y#e,
;"nasm -f elf hello.asm" y$!~</=b
;"ld hello.o -o hello" Nl1&na)K}
;"./hello" P!:D2zSH_
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section .data ;data section declaration *C$
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msg db 'Hello World!',0AH 5)0R:
len equ $-msg ;string length CYz]tv}g:
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section .text ;code section declaration 3^8%/5$v
global _start ;entry point (start of execution) PQ1\b-I
_start: mov edx,len ;string length .Zo8KwkFY
mov ecx,msg ;string start cd\0
mov ebx,1 ;file handle: stdout @;pTQ
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mov eax,4 ;sys_write q")}vN
int 80h ;kernel system call }E*#VA0/nY
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mov ebx,0 ;return value uA,K}sNRZ
mov eax,1 ;sys_exit dqcfs/XhP
int 80h ;kernel system call s@0#w*N
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x86 CPU,Windows,MASM32 z1s9[5
.386 U)N;=gr\
.model flat,stdcall rNdap*.
option casemap:none B+,Z 3*
;Include 文件定义 w
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include windows.inc kZfO`BVL
include user32.inc <wa}A!fu
includelib user32.lib iB{O"l@w
include kernel32.inc LvB -%@n
includelib kernel32.lib {,,w5/k^
;数据段 6:@tHUm
.data uS3J^=>@(a
szCaption db 'A MessageBox!',0 [@Y?'={qE
szText db 'Hello,world!',0 !RAyUfS
;代码段 p.)G ],
.code _.zW[;84b
start: AfyEFnY
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK )0YMi!&j`
invoke ExitProcess,NULL cSQvP.
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ji:JLvf]%
end start >{V]q*[/;Q
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BEGIN { print "Hello, world!" } nx84l 7<
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BASIC ]hc.cj`\W&
传统版BASIC(例如GWBASIC): [
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10 PRINT "Hello, world!" J1hc :I<;
20 END *o`bBdZ
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或在提示符输入: ^I@43Jy/
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?"Hello, world!":END %3|0_
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现代版BASIC(例如Quick BASIC): /(5SJ(a
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Print "Hello, world!" ZF>zzi+@
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以下的语句在Quick BASIC中同样有效: V_$ BZm%8J
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? "Hello,world!" 5fjmr
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GET "LIBHDR" i.C+{QH
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LET START () BE I5
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WRITES ("Hello, world!*N") p$0G EYwM
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#include <stdio.h> 9@9(zUS|
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int main(void) |#^wYZO1U
{ iimTr_TEt
printf("Hello, world!\n"); @FKm_q
return 0; E3@G^Y
} ^~'tQ}]!"
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C++ N =FX3Z
#include <iostream> <b.?G
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int main() |4^us|XY
{ UzTFT:\
std::cout << "Hello, world!" << std::endl; 0K<y
}
return 0; fkbHfBp[(A
} M_lQ^7/
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C++/CLI A)/8j2
int main() ^lud2x$O^C
{ S:aAR*<6
System::Console::WriteLine("Hello, world!"); <=[,_P6|
} FrT.<3
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C# (C Sharp) +i HZ*
class HelloWorldApp z~f Zg6
{ TwJiYXHw?
public static void Main() C,r[H5G#
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System.Console.WriteLine("Hello, world!"); ,<Zu4bww
} dCc"Qr[k
} T5H[~b|9-
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COBOL 1?%Q"*Y&
IDENTIFICATION DIVISION. ;n]GHqzY_
PROGRAM-ID. HELLO-WORLD. x8x8T$
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ENVIRONMENT DIVISION. &B?TX.
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DATA DIVISION. Bu7Ztt*
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PROCEDURE DIVISION. $23*:)&J4
DISPLAY "Hello, world!". W}jel}:
STOP RUN. uy'm2
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Common Lisp :x88
(format t "Hello world!~%") oHh~!#u
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DOS批处理 f4[fXP;A
@echo off @N+ }cej
echo "Hello, world!" 0>{&8:
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Eiffel VS`
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class HELLO_WORLD u*}[fQ`aF
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creation |p_\pa1&
make ^V6cx2M
feature 7 6 nrDE
make is 4gD;X NrV
local :DWvH,{+&
io:BASIC_IO |z.x M>
do b-!+Q)
!!io p}}pq~EH/
io.put_string("%N Hello, world!") x;N@_FZ7KY
end -- make
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end -- class HELLO_WORLD 2-G6I92d
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Erlang G42J
-module(hello). B8Vhl:p
-export([hello_world/0]). )WWqi,T}
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hello_world() -> io:fwrite("Hello, World!\n"). _"0,
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Forth t .\<Q#bN#
." Hello, world!" CR TwfQq`
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Fortran <[l0zE5Z8'
WRITE(*,10) fI<|]c}P&J
10 FORMAT('Hello, World!') <b.O^_zQF
STOP yj$a0Rgkv
END 2eC`^
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HTML S"=y>.#
<HTML> U~CG(9
<HEAD> WNnB
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<TITLE> Hello World! </TITLE> SHow~wxw
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<BODY> )t#>fnN
<p>Hello World!</p> ]`+J!G,
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DO ,1 SUB #1 <- #238 %VH{bpS|i:
DO ,1 SUB #2 <- #112 ?zpN09e
DO ,1 SUB #3 <- #112 0 k(su
DO ,1 SUB #4 <- #0 8el\M/u{
DO ,1 SUB #5 <- #64 uD=FTx
DO ,1 SUB #6 <- #238 l/i7<