“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。 B;GxfYj
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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》。 N.0HfYf
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以下是用不同语言写成的Hello World程序的几个例子: @ /UOSU
Ada h4aygc
with Ada.Text_Io; use Ada.Text_Io; `6Ureui2?
procedure Hello is )W8L91-
begin @7@e`b?
Put_Line ("Hello, world!"); W$" Y%^L
end Hello; h
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汇编语言 gX@nPZjg
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x86 CPU,DOS,TASM Hz}+SAZ
MODEL SMALL &Y,Q>bu
IDEAL -F"d0a,
STACK 100H G{kj}>kS_
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DATASEG (Sth:{;
HW DB 'Hello, world!$' uxa=KM1H
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CODESEG k42b:W5%
MOV AX, @data Es'-wr\Hm
MOV DS, AX :be:-b%K
MOV DX, OFFSET HW Y*@|My`
MOV AH, 09H !8xKf*y
INT 21H zmf"I[)
MOV AX, 4C00H
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INT 21H ,IIZXl@
END i8Fs0U4"
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x86 CPU,GNU/Linux,NASM Jen%}\
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). X8Xn\E
;Enter this into "hello.asm" then type: VJDoH
;"nasm -f elf hello.asm" v
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;"ld hello.o -o hello" a9=> r
;"./hello" 8lwFAiC8
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section .data ;data section declaration 3cqQL!Gm
msg db 'Hello World!',0AH i'HPRY
len equ $-msg ;string length b6"}"bG
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section .text ;code section declaration cGNvEM(4AV
global _start ;entry point (start of execution) Q"%S~'
_start: mov edx,len ;string length _.{zpF=j
mov ecx,msg ;string start zsDocR
mov ebx,1 ;file handle: stdout daslaa_A
mov eax,4 ;sys_write ca(U!T68
int 80h ;kernel system call `?|Rc
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mov ebx,0 ;return value #--olEj!
mov eax,1 ;sys_exit O|I+],
int 80h ;kernel system call $Jp~\_X
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x86 CPU,Windows,MASM32 9_ZBV{
.386 yHNuU)Ft
.model flat,stdcall 7X}TB\N1
option casemap:none BX[~%iE
;Include 文件定义 xvmt.> f
include windows.inc R,Fgl2
include user32.inc Vr/Bu4V"
includelib user32.lib abi[jxCG
include kernel32.inc $W&:(&
includelib kernel32.lib zBY~lNB
;数据段 vT c7an6fy
.data YLOwQj'
szCaption db 'A MessageBox!',0 nIn2 *r
szText db 'Hello,world!',0 R`#W wx>b
;代码段 N}b^fTq
.code :"QfF@Z{
start: NQX>Qh
2
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK o0ZBi|U\4
invoke ExitProcess,NULL S8" f]5s
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> zrRFn `B
end start Z/<#n\>t0>
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AWK u7s"0f`
BEGIN { print "Hello, world!" } +-BwQ{92[:
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BASIC Nu^p
传统版BASIC(例如GWBASIC): 83 I-X95
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10 PRINT "Hello, world!" +C+<BzR~A.
20 END ez\eOH6
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或在提示符输入: j*400
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?"Hello, world!":END FW..mD9)}
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现代版BASIC(例如Quick BASIC): }D*yr3b
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Print "Hello, world!" WO X}Sw"
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以下的语句在Quick BASIC中同样有效: <
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? "Hello,world!" qMP1k7uG)
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BCPL kWhr1wR1
GET "LIBHDR" #%$28sxB
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LET START () BE IP3E9z_L
$( v.&>Ih/L
WRITES ("Hello, world!*N") GZ3 ]N
$) mchJmZ{A
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Befunge A"uULfnk
"!dlrow olleH">v 65TfFcQ<S
, 'cBBt
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uw AwWgl
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Brainfuck {"S6\%=
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< H8{ol6wc)6
+++++++++++++++.>.+++.------.--------.>+.>. ]:ZdV9`
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#include <stdio.h> LWnR?Qve<
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int main(void) ABh&X+YD
{ X4|4QgY
printf("Hello, world!\n"); !bnyJA
return 0; U_B((Z(g
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C++ Q~{H@D`<
#include <iostream> CW&.NT
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int main()
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{
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std::cout << "Hello, world!" << std::endl; _)T5lEFl=
return 0; b^0}}12
} <h-vjz
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C++/CLI !%)F J:p
int main() Ej".axjT
{ aJ") <_+
System::Console::WriteLine("Hello, world!"); h:Gu`+D>W
} c2t=_aAIPQ
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C# (C Sharp) , EGQ@:3/
class HelloWorldApp #|&Sc_#4)
{ eq(am%3~
public static void Main() u_(VEfs4
{ eIRLNxt+v
System.Console.WriteLine("Hello, world!"); N ,8/Y
} Y2o?gug
} gL_Y,A~Q{
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COBOL [W%$qZlP
IDENTIFICATION DIVISION. 8V^oP]Y
PROGRAM-ID. HELLO-WORLD. 4RSHZAJg
{} 3${
ENVIRONMENT DIVISION. fQ#l3@in
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DATA DIVISION. :xtXQza"-
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PROCEDURE DIVISION. N[s}qmPha
DISPLAY "Hello, world!". NR`C(^}
STOP RUN. {NHdyc$
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Common Lisp C?lcGt!H
(format t "Hello world!~%")
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DOS批处理 BO;6
u^[
@echo off rJGf.qJJ
echo "Hello, world!" Wk)OkIFR
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Eiffel ibj87K
class HELLO_WORLD <
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creation '<"s \,
make %J+E/
feature )h7<?@wv&
make is bbE!qk;hEP
local #d6)#:uss
io:BASIC_IO hb}+A=A=+
do g:hjy@ w
!!io E|iQc8gr&
io.put_string("%N Hello, world!") .+$Q<L
end -- make Q+[n91ey**
end -- class HELLO_WORLD ]n6#VTz*
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Erlang fdFo# P
-module(hello). ]'&LGA`
-export([hello_world/0]). ;ub;lh 3
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hello_world() -> io:fwrite("Hello, World!\n"). ZOh`(})hy
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Forth Te"ioU?.
." Hello, world!" CR NPy&O