“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。 P}=U
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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》。 M3VTzwuf^S
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以下是用不同语言写成的Hello World程序的几个例子: -xVZm8y
Ada tNG[|Bi#
with Ada.Text_Io; use Ada.Text_Io; hYbaVE
procedure Hello is nt_FqUJ
begin W+I""I*mV
Put_Line ("Hello, world!"); 7DPxz'7):
end Hello; ^O
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汇编语言 Ke^9R-jP
#+ Y%Bxf
x86 CPU,DOS,TASM ZV;~IaBL
MODEL SMALL `d}t?qWS;F
IDEAL #H]c/
STACK 100H 7nPjeh
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DATASEG jct'B}@X(
HW DB 'Hello, world!$' J-z<&9
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CODESEG #Q"04'g
MOV AX, @data (
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MOV DS, AX Jb6)U]
MOV DX, OFFSET HW wv
MOV AH, 09H $/crb8-C
INT 21H e^k)756
MOV AX, 4C00H |pZ:5ta#
INT 21H CI1K:K AM
END _`lPLBr6
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x86 CPU,GNU/Linux,NASM Z# %s/TL
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). +`7!4gxwK!
;Enter this into "hello.asm" then type: ~(`&hYE
;"nasm -f elf hello.asm" NQcNY=
;"ld hello.o -o hello" VA@
;"./hello" aUi^7;R&<
n )PqA*
section .data ;data section declaration q)3QmA~
msg db 'Hello World!',0AH T>|Y_3YO_a
len equ $-msg ;string length D67z6jep(
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section .text ;code section declaration %6la@i
global _start ;entry point (start of execution) u
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_start: mov edx,len ;string length nG%<n
mov ecx,msg ;string start )4RSo&9p`
mov ebx,1 ;file handle: stdout p2
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mov eax,4 ;sys_write >*EJ6FPO
int 80h ;kernel system call gnadx52FP
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mov ebx,0 ;return value m^ /s}WEqp
mov eax,1 ;sys_exit dKY#Tl]
int 80h ;kernel system call ?e\u_3-9
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x86 CPU,Windows,MASM32 kDG?/j90D
.386 C@g/{?\
.model flat,stdcall q|
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option casemap:none ]*D~>q"#\
;Include 文件定义 G!Yt.M0
include windows.inc M5P3;
include user32.inc o$ #q/L
includelib user32.lib t$b5,"G1
include kernel32.inc <Y"HCa{
includelib kernel32.lib Z>~7|vl
;数据段 :1;"{=Yx}
.data p!EG:B4
szCaption db 'A MessageBox!',0 Z=
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szText db 'Hello,world!',0 |Yv,zEY)
;代码段 Lb?0<
.code I%{ 1K+V/
start: jW{bP_,"
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK XePGOw))O
invoke ExitProcess,NULL eH~T PH
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> o7^0Lo5Z?
end start xyHv7u%*
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BEGIN { print "Hello, world!" } e-nwR
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BASIC >3}N;
传统版BASIC(例如GWBASIC): Lj/
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10 PRINT "Hello, world!" Fzt7@VNxc
20 END Z*IW*f&0>1
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或在提示符输入: U;M! jj
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?"Hello, world!":END 7eW6$$ju,N
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现代版BASIC(例如Quick BASIC): Qjd]BX;
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Print "Hello, world!" FD[4?\W]#
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以下的语句在Quick BASIC中同样有效: >DN^',FEm
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? "Hello,world!" 4O:HT m
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BCPL DcG=u24Xy!
GET "LIBHDR" d$8K,-M
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LET START () BE +O)ZB$w4
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WRITES ("Hello, world!*N") ?O"zp65d(
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Befunge wr~Qy4 ny
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Brainfuck 7%G&=8tq
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< _#uRKy<`N
+++++++++++++++.>.+++.------.--------.>+.>. jUDE)~h
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C 1^ iLs
#include <stdio.h> =dmxE*C
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int main(void) x=X&b%09
{ r?dkE=B
printf("Hello, world!\n"); N`qGwNT%G
return 0; 16Jjf|]j
} D_G]WW8
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C++ #B
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#include <iostream> G&`5o*).bb
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int main() @, AB2D
{ O&}R
std::cout << "Hello, world!" << std::endl; rDu?XJA
return 0; KuEM~Q=
} LR'~:46#u
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C++/CLI %IDl+_j
int main() (`u+(M!^
{ 'Mhnu2d
System::Console::WriteLine("Hello, world!"); /||8j.Tm
} yo$A0Ti!w
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C# (C Sharp) *~w?@,}
class HelloWorldApp SpOSUpl%
{ %e_){28 n
public static void Main() Mc,p]{<<AV
{ b,'rz04^
System.Console.WriteLine("Hello, world!"); QUg<~q)Oq
} Hl*#iUq
} >5zD0!bA
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COBOL F!2VTPm9z
IDENTIFICATION DIVISION. YG)7+94
PROGRAM-ID. HELLO-WORLD. |!1iLWQ
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ENVIRONMENT DIVISION. (a~V<v"
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DATA DIVISION. )}vUYTU1
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PROCEDURE DIVISION. ?,C'\8'
DISPLAY "Hello, world!". 75A60Uw
STOP RUN. pK'D(t
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Common Lisp 6;Mv)|FJF
(format t "Hello world!~%") p%/lP{
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DOS批处理 |HPb$#i
@echo off mXMU
echo "Hello, world!" 3wfJ!z-E8
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Eiffel r4iT
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class HELLO_WORLD &yqk96z
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creation 6'e 'UD
make f9'dZ}B
feature
q ^Gj
IP
make is Hl8\*#;C&>
local kq(]7jU$[
io:BASIC_IO B0gs<E
do $cLZ,N24
!!io u
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io.put_string("%N Hello, world!") d ;,C[&
end -- make =H^~"16
end -- class HELLO_WORLD -cUw}
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Erlang 1J&hm[3[K
-module(hello). Hq,NOP
-export([hello_world/0]). nQn=zbZ3
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hello_world() -> io:fwrite("Hello, World!\n"). 7'@~TM
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