“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。
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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》。 kj.9\
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以下是用不同语言写成的Hello World程序的几个例子: ,!LY:pMK
Ada wf1p/bpf
with Ada.Text_Io; use Ada.Text_Io; *
h S 6F
procedure Hello is [)dIt@Y&j
begin NQ;$V:s)
Put_Line ("Hello, world!"); ,c0LRO
end Hello;
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汇编语言 i7v=o#
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x86 CPU,DOS,TASM ~iQBgd@D^
MODEL SMALL +Mhk<A[s
IDEAL Y)$%-'=b+
STACK 100H -meY[!"X
hW/Ve'x[
DATASEG arRU` 6?
HW DB 'Hello, world!$' Ewq@>$_!
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CODESEG *}';q`u}
MOV AX, @data D/ sYH0.V$
MOV DS, AX XGbpH<
MOV DX, OFFSET HW }
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MOV AH, 09H >SLmlK
INT 21H 3 =c#LUA`
MOV AX, 4C00H 0!KYi_3
INT 21H Ycq )$7p
END (=fLWK{8
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x86 CPU,GNU/Linux,NASM 5 r_Z3/%
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). `Mbs6AJ
;Enter this into "hello.asm" then type: J~ome7L
;"nasm -f elf hello.asm" Jc}6kFgO6
;"ld hello.o -o hello" jpS$5Ct
;"./hello" =Ry8E2NuM
*| W*Mu
section .data ;data section declaration h(~/JW[
msg db 'Hello World!',0AH L-S5@;"
len equ $-msg ;string length ={
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section .text ;code section declaration vM!2?8bEFd
global _start ;entry point (start of execution) s]0 J'UN
_start: mov edx,len ;string length j[FB*L1!D
mov ecx,msg ;string start s3nt2$=:t
mov ebx,1 ;file handle: stdout nTD%i~t~o
mov eax,4 ;sys_write a#% *H
int 80h ;kernel system call `w`N5 !
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mov ebx,0 ;return value y6-P6T
mov eax,1 ;sys_exit w+)wrJTtm
int 80h ;kernel system call (|o@
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x86 CPU,Windows,MASM32 2|i1}
.386 +/eJ#Xw3u8
.model flat,stdcall W94 u7a
option casemap:none 3`vKEThY)
;Include 文件定义 `Npo|.?=
include windows.inc #3LZX!
include user32.inc 6SE^+@jR
includelib user32.lib NIQ}+xpC
include kernel32.inc wb(S7OsMO
includelib kernel32.lib ub9[!}r't
;数据段 <T)0I1S
.data ;r~1TUKb
szCaption db 'A MessageBox!',0 D_$N2>I-
szText db 'Hello,world!',0 r(Z?Fs/
;代码段 'nh2}
.code -AD`(b7q
start: *y7Yf7
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK f{O-\
invoke ExitProcess,NULL $kHXt]fU
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> YcwDNsk
end start l<4P">M!.
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AWK Q(aNa!
BEGIN { print "Hello, world!" } n{L^W5B
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BASIC oMLs22Do?
传统版BASIC(例如GWBASIC): GYb&'#F~t
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;
10 PRINT "Hello, world!" _=`DzudE
20 END pCo3%(
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或在提示符输入: z^T;d^OJc
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?"Hello, world!":END ;8K>]T)
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现代版BASIC(例如Quick BASIC): +e*C`uP!
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Print "Hello, world!" [.xc`CF
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以下的语句在Quick BASIC中同样有效: }|) N5bGQe
qa@;S,lp
? "Hello,world!" ._A4:
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BCPL L;vglS=l;
GET "LIBHDR" 4Y3@^8h&=
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LET START () BE T]1.":
$( *>zOWocxD
WRITES ("Hello, world!*N") <3N\OV2
$) U,T#{
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Befunge /g9^g(
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Brainfuck Kx,X{$Pe
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< (vi^ t{k
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#include <stdio.h> %"
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int main(void) ]g oVQ'Y
{ P Gxv4(%
printf("Hello, world!\n"); nZL!}3@<
return 0; l& sEdEA
} fy$CtQM
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C++ yLXIjR
#include <iostream> fwzyCbks
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int main() ;$$w`LyP
{ ?;5/"/i
std::cout << "Hello, world!" << std::endl; 9h-S,q!
return 0; 9PO5GYU
} +gBDE:
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C++/CLI aYpc\jJ
int main() {(F}SF{
{ .ty2! .
System::Console::WriteLine("Hello, world!"); [rAi9LSO"
} tx+P@9M_Aq
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C# (C Sharp) K~^o06 Y
class HelloWorldApp 0N4ZV}s,d
{ RASk=B
public static void Main() "?
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{ w+!V,lU"^
System.Console.WriteLine("Hello, world!"); #%OS=.V
} mN R}%s
} wu{%gtx/;^
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COBOL |6Iw\YU
IDENTIFICATION DIVISION. PT&qys2k
PROGRAM-ID. HELLO-WORLD. = 4'r+2[
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ENVIRONMENT DIVISION. NcSi %]
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DATA DIVISION. biQ~q$E
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PROCEDURE DIVISION. EWVn*xl?
DISPLAY "Hello, world!". Gh%dVP9B@P
STOP RUN. Ac
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Common Lisp "*d%el\63
(format t "Hello world!~%") &&96kg3
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DOS批处理 "#%9dWy
@echo off bD1IY1
echo "Hello, world!" (|y@ftr@
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Eiffel 7V~
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class HELLO_WORLD
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