“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。 lx~C{tl2
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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》。 {9Q**U`w
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以下是用不同语言写成的Hello World程序的几个例子: Udjn.D
Ada Fd%JF#Hk
with Ada.Text_Io; use Ada.Text_Io; T=g2gmo9
procedure Hello is PbV1FB_
begin .8[uEQ_L
Put_Line ("Hello, world!"); Y%zWaH
end Hello; z\WyL ;
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汇编语言 md/h\o&
5+(Cp3
x86 CPU,DOS,TASM Tj6Czq=*%T
MODEL SMALL ZF<$6"4N
IDEAL tq*6]q8c>
STACK 100H UdpuQzV<4`
T*(mi{[T
DATASEG ;j<#VS-]
HW DB 'Hello, world!$' rfh`;G5s
JM*!(\Y
CODESEG /f=31<+MtF
MOV AX, @data $B]_^
MOV DS, AX D|vck1C5,
MOV DX, OFFSET HW .[?2_e#9 %
MOV AH, 09H 4i"fHVp8
INT 21H gmiLjI
MOV AX, 4C00H G//hZwf0
INT 21H lxR]Bh+
END @)ls+}=Y
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hw B9N
x86 CPU,GNU/Linux,NASM sM9utR
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). !_iv~Q zv
;Enter this into "hello.asm" then type: sWVapup?
;"nasm -f elf hello.asm" =W gzj|Kr
;"ld hello.o -o hello" 0R-W9qP
;"./hello" )]zsAw`/
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section .data ;data section declaration W*u$e8i7
msg db 'Hello World!',0AH Y44[2 :m
len equ $-msg ;string length jZe/h#J)[
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section .text ;code section declaration
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global _start ;entry point (start of execution) m`tX&K#-
_start: mov edx,len ;string length 2=VFUR 8
mov ecx,msg ;string start r\ C"Fx^
mov ebx,1 ;file handle: stdout xd+aO=)Td
mov eax,4 ;sys_write u!FF{~5cs
int 80h ;kernel system call 60xL.Z
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mov ebx,0 ;return value -^< t%{d
mov eax,1 ;sys_exit DX/oHkLD'
int 80h ;kernel system call srS)"Jt
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x86 CPU,Windows,MASM32 \[AJWyP
.386 +u`4@~D#
.model flat,stdcall X7*fmD=Uy
option casemap:none nIfp0U*
;Include 文件定义 Jpn= ^f[rm
include windows.inc 8RcLs1n/
include user32.inc L=I;0Ip9y
includelib user32.lib 2~yj
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include kernel32.inc rG%8ugap
includelib kernel32.lib ZT<VDcP{
;数据段 ~sNBklK
.data sH%Ts@Pl
szCaption db 'A MessageBox!',0 tLP
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szText db 'Hello,world!',0 _C,9c7K4
;代码段 `r %lB
.code P!XO8X 1F
start: Ggbz
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK R}D[ z7
invoke ExitProcess,NULL kR8,E 6Up
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 5?f!hB|6
end start EZZE(dq@gf
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AWK VU+=b+B~m
BEGIN { print "Hello, world!" } &_\;p-1:
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BASIC UUGX@
传统版BASIC(例如GWBASIC): FgMQ=O 2
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10 PRINT "Hello, world!" 'oUTY *
20 END Fx:4d$>;
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或在提示符输入: f @Vd'k<
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?"Hello, world!":END *qFl&*h}
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现代版BASIC(例如Quick BASIC): UQbk%K2
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Print "Hello, world!" _.I58r
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以下的语句在Quick BASIC中同样有效: &%u m#XE
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? "Hello,world!" &
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BCPL 9I''$DVf
GET "LIBHDR" S#T u/2<}
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LET START () BE \~l"
$( i9T<(sdK+
WRITES ("Hello, world!*N") 35:RsL
$) Ve<f}
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Befunge
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, 9~y:K$NO
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Brainfuck v@{VQVx
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#include <stdio.h> hDc2T
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int main(void) $f>(TW
{ q(Ow:3&
printf("Hello, world!\n"); bH!_0+$P
return 0; q#\B}'I{
} OjrZ6
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C++ RMdU1@
#include <iostream> j]aIJbi
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int main() PH'n`D#
{ XV,ce~ro[
std::cout << "Hello, world!" << std::endl; 4
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return 0; A=70UL
} dJlK'zK
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C++/CLI x6^FpNgQ
int main() qxYCT$1
{ s4 Vju/
System::Console::WriteLine("Hello, world!"); ,fo7.
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} PF+Or
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C# (C Sharp) bfkFk
class HelloWorldApp x'SIHV4M@Q
{ c5pK%I }O
public static void Main() _Ih"*~ r/&
{ `'gcF});
System.Console.WriteLine("Hello, world!"); &%eM
} '2rSX[$tf
} uA cvUN-@
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COBOL 3}C-Hg+gt
IDENTIFICATION DIVISION. ;ULw-&]P
PROGRAM-ID. HELLO-WORLD. %Z8pPH~T
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ENVIRONMENT DIVISION. T7l,}G
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DATA DIVISION. IoV"t,
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PROCEDURE DIVISION. Mgu9m8
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DISPLAY "Hello, world!". xn)F(P 0kv
STOP RUN. j)Z0K$z=
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Common Lisp MJa`4[/
(format t "Hello world!~%") "#iO{uMWb
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DOS批处理 u=E &jL5U
@echo off Ec }9R3 m
echo "Hello, world!" #MbY+[Y@v
, 10+Sh
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Eiffel `M-
class HELLO_WORLD 579t^"ja~
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creation Lmw)Ts>
make '
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feature 4`7~~:W!M5
make is c;=St1eoz
local ?DnQU"_$
io:BASIC_IO
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do oeI[x
!!io ^}:0\;|N
io.put_string("%N Hello, world!") /gn\7&