“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。 KfPgj
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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》。 T\ukJ25!
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以下是用不同语言写成的Hello World程序的几个例子: "!fwIEG
Ada Ed{sC[j=
with Ada.Text_Io; use Ada.Text_Io; LU8:]zOY
procedure Hello is ^QG<_Dm]
begin aR'~=t&;z1
Put_Line ("Hello, world!"); ori[[~OyB
end Hello; i2;,\FI@t%
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汇编语言 VR%*8=
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x86 CPU,DOS,TASM 'H4?V
MODEL SMALL B2KBJ4rI[1
IDEAL 1C]BaPbL
STACK 100H p:eaZ
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DATASEG `B:hXeI
HW DB 'Hello, world!$' 1_]%,
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CODESEG baL<|&
c
MOV AX, @data =P_*.SgR
MOV DS, AX Sfp-ns32%A
MOV DX, OFFSET HW tfh`gUV4
MOV AH, 09H 8rFP*K9
INT 21H }n#$p{e$i
MOV AX, 4C00H =Zsxl]h
INT 21H e**'[3Y
END /[ft{:#&t
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x86 CPU,GNU/Linux,NASM `2^(Ss#)
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 83p8:C.Ze
;Enter this into "hello.asm" then type: -j:yE Z4Oy
;"nasm -f elf hello.asm" GU 9p'E
;"ld hello.o -o hello" .2_xTt
;"./hello" m(EVC}Y
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section .data ;data section declaration j~>J?w9<O
msg db 'Hello World!',0AH &.#dZ}J
len equ $-msg ;string length ipt]qJFd
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section .text ;code section declaration hd[t&?{=
global _start ;entry point (start of execution) P"t Dq&
_start: mov edx,len ;string length k,8^RI07@
mov ecx,msg ;string start ~V?\@R:g
mov ebx,1 ;file handle: stdout }<w9Jfr"X
mov eax,4 ;sys_write %qqeL
int 80h ;kernel system call _JA)""l%
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mov ebx,0 ;return value gS`Z>+V5!c
mov eax,1 ;sys_exit G `B=:s]
int 80h ;kernel system call E9t8SclV
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x86 CPU,Windows,MASM32 /TIt-c
.386 t("koA=.
.model flat,stdcall '?fGI3b~/
option casemap:none (v:8p!QN
;Include 文件定义 C7}iwklcsa
include windows.inc
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include user32.inc twK 3
includelib user32.lib z(2G"}
include kernel32.inc ~Ga{=OM??
includelib kernel32.lib FL&Y/5
;数据段 =^l`c$G<
.data !L3|5:j
szCaption db 'A MessageBox!',0
bk i:u
szText db 'Hello,world!',0 9>vB,8
;代码段 &Fjyi"8(r
.code : t75iB=
start: aD6!x3c/
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK A{T>Aac
invoke ExitProcess,NULL E8<,j})*
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> H`Zg-j`
end start Bsd~_y}8
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AWK &_j<!3*
BEGIN { print "Hello, world!" } q./jYe
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BASIC [D<(xr&N%
传统版BASIC(例如GWBASIC): r?^L/HGc
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10 PRINT "Hello, world!" PpNG`_O
20 END ^EW6}oj[
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或在提示符输入: v:>sS_^
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?"Hello, world!":END CDr0QM4k:.
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现代版BASIC(例如Quick BASIC): f'`y-]"V5)
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Print "Hello, world!" a"Ly9ovW
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以下的语句在Quick BASIC中同样有效: )|5mW
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? "Hello,world!" WU.eeiX
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BCPL 62G%.'7
GET "LIBHDR" RQ#9[6w!v
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LET START () BE - ku8n%u
$( yZNg[KH
WRITES ("Hello, world!*N") 2Qc_TgWF
$) 3RcnoXX_
Z *v`kl
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Befunge at2)%V)
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Brainfuck %j{*`}
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< {W%XSE
+++++++++++++++.>.+++.------.--------.>+.>. oL!C(\ERh
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C UF}Ji#fqn
#include <stdio.h> p6Ia)!xOGF
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int main(void) %;Z_`W
{ T)eUo
printf("Hello, world!\n"); aqQ
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return 0; fj9&J[
} bz [?M}
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C++ )2u_[Jc=
#include <iostream> UjyrmQf
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int main() (S6>^:;=~
{ ]IDhE{
std::cout << "Hello, world!" << std::endl; 5*Dh#FRp
return 0; 5CH8;sMK
} _BCq9/
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C++/CLI 'mF&`BN}b
int main() *w6F0>u
{ G1I<B
System::Console::WriteLine("Hello, world!"); };gcM@]]E
} i@%a!].I
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C# (C Sharp) >yLdrf
class HelloWorldApp {Wr5F9q
{ ItZ*$I1<
public static void Main() gXY]NWI
{ wX
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System.Console.WriteLine("Hello, world!"); @Q!Tvw/
} qmNG|U&
} f/m0,EERk
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COBOL \(zUI
IDENTIFICATION DIVISION. X'xnJtk
PROGRAM-ID. HELLO-WORLD. Q Vl"l'e8
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ENVIRONMENT DIVISION. o,$K=#Iv
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DATA DIVISION. ITz+O=I4R]
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PROCEDURE DIVISION. >3I|5kZ6
DISPLAY "Hello, world!". ^t`0ul]c
STOP RUN. 1>umf~%Wa
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vSCJ xSt#e
Common Lisp 8LY^>.
(format t "Hello world!~%") m;U_oxb
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DOS批处理 3 k/X;:,.
@echo off i
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echo "Hello, world!" dChMjaix
B& 5Md.h
=t.T9'{
Eiffel Xs~IoU
class HELLO_WORLD SXNde@%
{
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creation *- E'$
make @S&QxE^
feature I`x[1%y2 F
make is s+h}O}RV
local Q+O./1x*,
io:BASIC_IO
| 1a}p
do >^ E*7Bfp
!!io n-OQCz9Xl
io.put_string("%N Hello, world!") m<J:6^H@
end -- make H6lZ<R{=
end -- class HELLO_WORLD +.uQToqy
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Erlang *De'4r 2
-module(hello). nUCOHVI7
-export([hello_world/0]). NFqGbA|
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hello_world() -> io:fwrite("Hello, World!\n"). mgb+HNH%q\
h:KEhj\d?
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Forth h&rZR`g
." Hello, world!" CR Q9&H/]"v
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Fortran "kjSg7m*:
WRITE(*,10) l]~IZTC
10 FORMAT('Hello, World!') }q,d JE
STOP {W=5
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END )G*xI`(@
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HTML .X:,]of
<HTML> mrig5{
<HEAD> Mt@Ma ]!
<TITLE> Hello World! </TITLE> WYIv&h<h"
</HEAD> +fQJ#?N2n
<BODY> dZ4c!3'F
<p>Hello World!</p> Q 87'zf
</BODY> T9Fe!yVA
</HTML> YdN]Tqc
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