“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。 i%7b)t[y
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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》。 :^mfTj$
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以下是用不同语言写成的Hello World程序的几个例子: |BD]K0
Ada J[:3H6%`
with Ada.Text_Io; use Ada.Text_Io; 7d0E9t;W
procedure Hello is Zy2@1-z6
begin N@UO8'"9K&
Put_Line ("Hello, world!"); 75`*aAZ3
end Hello; g)+45w*+5
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汇编语言 %(`4wo},
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x86 CPU,DOS,TASM ZbJUOa?WF
MODEL SMALL N
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IDEAL iw|6w,-)C
STACK 100H pQaP9Y{OK
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DATASEG ]9?_m@Ihx
HW DB 'Hello, world!$' W?m?r.K?
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CODESEG ZFy>Z:&S,
MOV AX, @data 1!RD
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MOV DS, AX dA<PQKm
MOV DX, OFFSET HW CCJ!;d;&87
MOV AH, 09H /#?lG`'1
INT 21H QKYGeT7&Y'
MOV AX, 4C00H 9k_3=KS3N
INT 21H tk5Bb`a
END `,
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x86 CPU,GNU/Linux,NASM %J\1W"I?
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). kW&{0xkGR
;Enter this into "hello.asm" then type: 9
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;"nasm -f elf hello.asm" { U a19~'>
;"ld hello.o -o hello" Lxm1.TOJ
;"./hello" K#g)t/SZ
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section .data ;data section declaration <,,U>0?3
msg db 'Hello World!',0AH .IYE+XzV
len equ $-msg ;string length S2)rkX$
\M/XM6:UG4
section .text ;code section declaration {\G4YQ
global _start ;entry point (start of execution) `Nnqdc2
_start: mov edx,len ;string length *7hr3x
mov ecx,msg ;string start UA3%I8gu_
mov ebx,1 ;file handle: stdout DoA4#+RU
mov eax,4 ;sys_write vs|>U-Mpw~
int 80h ;kernel system call b'fj
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mov ebx,0 ;return value LQSno)OZ
mov eax,1 ;sys_exit EAq/Yw2$
int 80h ;kernel system call LV{a^!f`y
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F9]j{'#
x86 CPU,Windows,MASM32 Y7)YJI
.386 k3se<NL[
.model flat,stdcall Zs!)w9y&V
option casemap:none WF<0QH
;Include 文件定义 ^ MkT">
include windows.inc emb~l{K $
include user32.inc 2E/#fX9!4
includelib user32.lib $~4ZuV%
include kernel32.inc Nko;I?Fn
includelib kernel32.lib 8}m]XO
;数据段 GE=#8-@g~p
.data Y'kD_T`f,
szCaption db 'A MessageBox!',0 + oyW_!(
szText db 'Hello,world!',0 D.|h0gU
;代码段 Zk2-U"0\o
.code VF=$'Bl|
start: dI&2dcumS
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 5I5~GH
invoke ExitProcess,NULL
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> kEWC
end start xmZ]mu,,$
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BEGIN { print "Hello, world!" } 4O[T:9mn0
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BASIC "2(4?P
传统版BASIC(例如GWBASIC): CDei+ q
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10 PRINT "Hello, world!" >:5/V0;,
20 END !<}<HR^)
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或在提示符输入: j2" jCv
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?"Hello, world!":END <pRb#G"
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现代版BASIC(例如Quick BASIC): )DuOo83n["
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Print "Hello, world!" gPY2Bnw;l
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以下的语句在Quick BASIC中同样有效: swuW6p
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? "Hello,world!" oUR'gc :
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BCPL o
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GET "LIBHDR" $zq`hI!1
9)s=%dL
LET START () BE MsCY5g
$( 31k.{dnm
WRITES ("Hello, world!*N") C/ow{MxA
$) 9f;\fe
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Q u2W
Befunge QNzI
"!dlrow olleH">v =dUeQ?>t=
, v"6q!
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Brainfuck "zR+}
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+++++++++++++++.>.+++.------.--------.>+.>. >F6'^9|
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C nRN&u4
#include <stdio.h> {,|*99V
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int main(void) #0"Fw$Pc
{ _kl.zw%
printf("Hello, world!\n"); [Hy0j*
return 0; u!?.vx<qy
} 5E?{>1
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C++ $S|bD$e
#include <iostream> B@G'6 ?
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int main() `gfh]7T
{ &,2XrXiFu
std::cout << "Hello, world!" << std::endl; 6<.Ma7)lA
return 0; i[H`u,%+(
} [2~Et+r6g
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_/MHi-]/.
C++/CLI 8-UlbO6
int main() PYPs64kNC]
{ !]7Z),s
System::Console::WriteLine("Hello, world!"); i]a0
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} E(*RtOC<W
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C# (C Sharp) |"?0H#
class HelloWorldApp F#eZfj~
{ A#RA;Dt:
public static void Main() 'J#u;KJ
{
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System.Console.WriteLine("Hello, world!"); i-~HT4iw
} z{Z'2 ,#
} rePJ4i [y
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COBOL p)RASIB
IDENTIFICATION DIVISION. fI;6!M#
PROGRAM-ID. HELLO-WORLD. T?{"T/
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ENVIRONMENT DIVISION. w`&~m:R
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DATA DIVISION. s"?Z jV)`
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PROCEDURE DIVISION. f1y3l1/
DISPLAY "Hello, world!". n.n;'p9t@
STOP RUN. 0#0[E ,
L,M=ogdb
XCCN6[[+
Common Lisp o(Yfnnuy
(format t "Hello world!~%") wO/}4>\
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Lqq
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DOS批处理 ;D&FZ|`(u
@echo off [Nbs{f^J=
echo "Hello, world!" vx62u29m
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Eiffel FY+0r67]
class HELLO_WORLD w4P?2-kB
!f[LFQD
creation FJomUVR .
make 109dB$+$
feature -b"mx"'?
make is 5RXZ$/
local Fy37I/#)r&
io:BASIC_IO c1B<