“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。 Hb!6ZEmN%
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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》。 Qxt@V
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以下是用不同语言写成的Hello World程序的几个例子: /:p8I6;
Ada :1;Q(9:v
with Ada.Text_Io; use Ada.Text_Io; +EkW>$
procedure Hello is sV2iITFp
begin
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Put_Line ("Hello, world!"); mCdgKr|n
end Hello; au$"B/
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汇编语言 w4%AJmt
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x86 CPU,DOS,TASM ,S!w'0k|n
MODEL SMALL CW`!}yu%
IDEAL f Iy]/
STACK 100H hO( RZ'{
H~o <AmE0!
DATASEG |"7Y52d
HW DB 'Hello, world!$' .'d2J> ~N
3n48 %5
CODESEG }ZzLs/v%X
MOV AX, @data u|fXP)>.
MOV DS, AX ]db@RbaH
MOV DX, OFFSET HW kg>>D
MOV AH, 09H O3qM1-k}S
INT 21H 4l @)K9F
MOV AX, 4C00H AIZBo@xg
INT 21H !p[`IWZ
END op @iGC+
&leK}je [
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x86 CPU,GNU/Linux,NASM euQ.ArF
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). e:-8k_0|
;Enter this into "hello.asm" then type: d,9`<1{9
;"nasm -f elf hello.asm" i9m*g*"2
;"ld hello.o -o hello" b$-e\XB!
;"./hello" 926Tl
}V`mp
section .data ;data section declaration lZWX7FO'
msg db 'Hello World!',0AH OYmi?y\
len equ $-msg ;string length 8)wt$b
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section .text ;code section declaration PDP[5q r
global _start ;entry point (start of execution) "A[ b
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_start: mov edx,len ;string length |d}MxS`^
mov ecx,msg ;string start 2UadV_s+s
mov ebx,1 ;file handle: stdout _MfD
mov eax,4 ;sys_write #YK5WTn5
int 80h ;kernel system call b,<9
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mov ebx,0 ;return value shgAhx
mov eax,1 ;sys_exit `xz&Scil
int 80h ;kernel system call \x+3f
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x86 CPU,Windows,MASM32 Q@QFV~
.386 s;1h-Oq(
.model flat,stdcall :&w{\-0{
option casemap:none jbte
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;Include 文件定义 n$["z
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include windows.inc %y<]Yzv.
include user32.inc jirbUl
includelib user32.lib glUo7^ay7
include kernel32.inc nH[+n `{o
includelib kernel32.lib ux-CpI
;数据段 ~<9{#uM
.data B'weok
szCaption db 'A MessageBox!',0 Of[;Qn
szText db 'Hello,world!',0 ${hz e<g
;代码段
p{Sh F.
.code ?mYYt]R
start: K : LL_,
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK J5yidymrpW
invoke ExitProcess,NULL {nMAm/kyj
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Es'Um,ku
end start XFqJ 'R
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BEGIN { print "Hello, world!" } vO@s$qi
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BASIC =o=1"o[
传统版BASIC(例如GWBASIC): oC|WB S
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10 PRINT "Hello, world!" xN0*8
20 END V H^AcO
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或在提示符输入: ktH8as^54!
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?"Hello, world!":END E~hzh /,34
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现代版BASIC(例如Quick BASIC): *cv}*D
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Print "Hello, world!" )Y]/^1hx
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以下的语句在Quick BASIC中同样有效: k(s;,B\
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? "Hello,world!" SU%DW 46
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BCPL K
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GET "LIBHDR" @y|_d
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LET START () BE n!ok?=(kQ
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WRITES ("Hello, world!*N") [`_io>*g
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Befunge m
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#include <stdio.h> LXfCmc9|Z
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int main(void) K%g;NW
{ nKh&-E
printf("Hello, world!\n"); }At{'8*n
return 0; fnu"*5bE
} sq0 PBEqq
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C++ ":;@Hnb/
#include <iostream> :
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int main() ^y_fRP~
{ `sHuM*
std::cout << "Hello, world!" << std::endl; +V(5w`qx
return 0; I=Zx"'Um
} )9j06(<A
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C++/CLI 2 h|e
int main() (M-ZQ
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{ H#d:kil Ny
System::Console::WriteLine("Hello, world!"); %}Q&1P=
} }=}>9DSM
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C# (C Sharp) L\aBc}
class HelloWorldApp v:_B kHN'
{ MBr:?PE7
public static void Main() pd@; b5T
{ *TdnB'Gd
System.Console.WriteLine("Hello, world!"); <9A@`_';Aq
} Ka_S n
} >v5k{Cbp0
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COBOL 1&)_(|p[C
IDENTIFICATION DIVISION. ||B;o-
PROGRAM-ID. HELLO-WORLD. @1RP/y%
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ENVIRONMENT DIVISION. Ss?CfRM
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DATA DIVISION. M^madx6`
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PROCEDURE DIVISION. U yqXMbw@
DISPLAY "Hello, world!". B5am1y{P#
STOP RUN. .V'V:;BE%
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Common Lisp Oxx^[ju~
(format t "Hello world!~%") ,w)p"[^b
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DOS批处理 g^>#^rLU
@echo off &~DTZgY
echo "Hello, world!" mryN}
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