“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。 Csm23QLsg)
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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》。 6oGF6C
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以下是用不同语言写成的Hello World程序的几个例子: rgu7g
Ada n{E+r
with Ada.Text_Io; use Ada.Text_Io; 1gH>B5`
procedure Hello is Byns6k
begin oX-h7;SD
Put_Line ("Hello, world!"); {Yti
end Hello; 3
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汇编语言 T)cbpkH4
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x86 CPU,DOS,TASM `"|u
NVn
MODEL SMALL ="[6Z$R
IDEAL m6
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STACK 100H Va\?"dH>M
!xD_=O
DATASEG 28o!>*
HW DB 'Hello, world!$' O:X|/g0Y
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CODESEG wk6tdY{&s
MOV AX, @data u=B,i#>s
MOV DS, AX 4Bq4d.0
MOV DX, OFFSET HW .w~zW*M0
MOV AH, 09H OSCe TkR
INT 21H MtK5>mhZI`
MOV AX, 4C00H -MeO|HWm
INT 21H nB ,&m&
END mr`EcO0
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x86 CPU,GNU/Linux,NASM xw rleB
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 2aGK}sS6
;Enter this into "hello.asm" then type: u}KEH@yv
;"nasm -f elf hello.asm" >l!DWi6
;"ld hello.o -o hello" 2<+9lk
;"./hello" 2a:JtJLl
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section .data ;data section declaration :WdiH)Zv
msg db 'Hello World!',0AH W_G'wU3R
len equ $-msg ;string length lmr:PX
(~n0,$
section .text ;code section declaration iLG~_Ob:
global _start ;entry point (start of execution) 0t}&32lL&
_start: mov edx,len ;string length Amvl/bO
mov ecx,msg ;string start (B;rjpK
mov ebx,1 ;file handle: stdout V|bN<BYJ
mov eax,4 ;sys_write SN|:{Am
int 80h ;kernel system call u:&Lf
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mov ebx,0 ;return value 97(*-e= e
mov eax,1 ;sys_exit
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int 80h ;kernel system call {KalVZX2R
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x86 CPU,Windows,MASM32 J;7O`5J
.386 g"L$}#iTsl
.model flat,stdcall fRd^@@,[
option casemap:none [0mg\n?
;Include 文件定义 Mi_/
^
include windows.inc V$fvf#T
include user32.inc
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includelib user32.lib Sj<WiQ%<
include kernel32.inc gEU|Bx/!=
includelib kernel32.lib uvf}7
;数据段 O9]+Jd4W
.data (lVHKg&U[
szCaption db 'A MessageBox!',0 !5K9L(gqb
szText db 'Hello,world!',0 9;u&,R
;代码段 }e* OprF
.code S&YC"
start: <;Bv6.Z
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ,L}
invoke ExitProcess,NULL pe$l'ur
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |\MgE.N
end start mVuZ}`
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BEGIN { print "Hello, world!" } m|w-}s,
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BASIC 11(:#4Y,
传统版BASIC(例如GWBASIC): %^$7z,>;
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10 PRINT "Hello, world!" lUd;u*A
20 END 9vZD?6D,n
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或在提示符输入: -r5JP[0kP
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?"Hello, world!":END %nfaU~IqK
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现代版BASIC(例如Quick BASIC): %Z=%E!*
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Print "Hello, world!" 8=U0\<wT
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以下的语句在Quick BASIC中同样有效: 6eh\-+=
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? "Hello,world!" tmJ-2
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'dstAlt?
BCPL 0qj:v"~Q
GET "LIBHDR" #r}O =izi
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LET START () BE M3U*'A\
$( r{T}pc>^
WRITES ("Hello, world!*N") k_hV.CV
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Befunge S_VZ^1X]
"!dlrow olleH">v l$~3_3+
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Brainfuck Gb\Nqx(
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+++++++++++++++.>.+++.------.--------.>+.>. ^T#bla893
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#include <stdio.h> 5mxYzu;#]
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int main(void) }j/($,
{ #MyR:V*a
printf("Hello, world!\n"); dp3>G2Yq
return 0; ?W*{%my
} Nj<}t/e
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C++ gxIGL-1M
#include <iostream> :4f>S)m
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int main() y\Z$8'E5W
{ 5*ip}wA
std::cout << "Hello, world!" << std::endl; G>/Gw90E
return 0; 3$u3ssOL
} n\v;4ly^
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C++/CLI arR9uxP
int main() 3~I|KF7x
{ UbD1h_b
System::Console::WriteLine("Hello, world!"); gkJL=,
} QxSJLi7t
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C# (C Sharp) `u zR!^X
class HelloWorldApp vU:FDkx*nn
{ '@$YX*[
public static void Main() 0UJ%tPS
{ WUwH W
System.Console.WriteLine("Hello, world!"); <QlpIgr
} }9k/Y/.
} 4&}V3"lg
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COBOL ''{REFjK7
IDENTIFICATION DIVISION. vr,8i7*0
PROGRAM-ID. HELLO-WORLD. `OL@@`'^{S
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ENVIRONMENT DIVISION. g>m)|o'
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DATA DIVISION. "$->nC.
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PROCEDURE DIVISION. u3"0K['3
DISPLAY "Hello, world!". ?s=O6D&
STOP RUN. 0Jz5i4B
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Common Lisp [g bYIwL.
(format t "Hello world!~%") 0zQ^ 6@
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DOS批处理 k`l={f8C
@echo off emhI1
*}
echo "Hello, world!" xJphG
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Eiffel wLF;nzv
class HELLO_WORLD 3pxZk%
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creation @%(Vi!Cv"R
make SdOa#U)
feature E[:eMJR
make is ^#|Sl D]
local $pKlF0 .
io:BASIC_IO y&ZyThqg
do B3+9G,or
!!io [y(DtOR
io.put_string("%N Hello, world!") Q]JWWKt6rV
end -- make hA6
end -- class HELLO_WORLD z%)~s/2Rs
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Erlang <G};`}$a
-module(hello). >@b]t,rrK
-export([hello_world/0]). 9H~2
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B]KR *
hello_world() -> io:fwrite("Hello, World!\n"). DFgQ1:6[
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Forth 8#m,TOp
." Hello, world!" CR \dm5Em/
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Fortran R[C+?qux
WRITE(*,10) S:bYeD4
10 FORMAT('Hello, World!') |/qwR~
STOP ?z
hw0
END q 9e(YX>
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HTML C+0MzfLgf
<HTML> 8t1XZ
<HEAD> S55h}5Y
<TITLE> Hello World! </TITLE> O'm5k l
</HEAD> )j/2Z-Ev:W
<BODY> :w!A_~ w2
<p>Hello World!</p> [P'"|TM[~
</BODY> <