“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。 7RL J
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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》。 N8{jvat
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以下是用不同语言写成的Hello World程序的几个例子: <f>w"r
Ada \7r0]& _
with Ada.Text_Io; use Ada.Text_Io; Wye* ~t
procedure Hello is ]VRa4ZB{u
begin Qs6Vu)U=
Put_Line ("Hello, world!"); Nc7"`!;-
end Hello; |Ev|A9J!
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汇编语言
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x86 CPU,DOS,TASM (WyNO QO'
MODEL SMALL e~N&?^M
IDEAL -AdDPWn
STACK 100H /I=|;FGq
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DATASEG >u&D@7~c
HW DB 'Hello, world!$' .d]/:T
-0
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CODESEG IR6W'vA
MOV AX, @data @MES.g
MOV DS, AX /\w4k
MOV DX, OFFSET HW f^uiZb
MOV AH, 09H 4]h/t&ppq
INT 21H WiS3W;
MOV AX, 4C00H rPaJ<>Kz
INT 21H &q-&%~E@
END AG@gOm
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x86 CPU,GNU/Linux,NASM <l{oE?N
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ub-3/T
;Enter this into "hello.asm" then type: &zdS9e-fF
;"nasm -f elf hello.asm" ""0Y^M2I
;"ld hello.o -o hello" Rql/@j`JX
;"./hello" ga5Q
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section .data ;data section declaration /?'~`4!(
msg db 'Hello World!',0AH K ze?@*
len equ $-msg ;string length fp' '+R[
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section .text ;code section declaration _ ;j1g%
global _start ;entry point (start of execution) 8tx*z"2S
_start: mov edx,len ;string length *[Z`0AgP
mov ecx,msg ;string start >GGM76vB=,
mov ebx,1 ;file handle: stdout !p&<.H_
mov eax,4 ;sys_write `Nx@MPo
int 80h ;kernel system call Z7a@$n3h
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mov ebx,0 ;return value _QL|pLf-
mov eax,1 ;sys_exit u}@N
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int 80h ;kernel system call ba|xf@=&
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x86 CPU,Windows,MASM32 J:@gmo`M;V
.386 )D+BvJ Y"
.model flat,stdcall $ZM'dIk?
option casemap:none #n>U7j9`O
;Include 文件定义 .G{cx=;
include windows.inc .l1x~(
include user32.inc ?+t;\
includelib user32.lib ys9:";X;}
include kernel32.inc >dl5^
includelib kernel32.lib 4YfM.~
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;数据段 T+Z[&|
.data J4T"O<i$58
szCaption db 'A MessageBox!',0 >3!~U.AA'x
szText db 'Hello,world!',0 o[ZjXLJzV
;代码段 _J1\c~ke"
.code .4zzPD$1
start: .-Lrrk)R+
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK >v+1v
invoke ExitProcess,NULL a
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 0/R;g~q@
end start f .O^R~,
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BEGIN { print "Hello, world!" } )U %`7(bN
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BASIC [c,V=:Cq
传统版BASIC(例如GWBASIC): ;'S,JGpvT
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10 PRINT "Hello, world!" /vSGmW-*
20 END `K{}
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或在提示符输入: )'+[,z ;s
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?"Hello, world!":END w+)${|N?
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现代版BASIC(例如Quick BASIC): .LDZqWr-
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Print "Hello, world!" h4`8C]
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以下的语句在Quick BASIC中同样有效: <=.6Z*x+
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? "Hello,world!" 6Z_V,LD9L
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BCPL w%])
GET "LIBHDR" (<Cq_Kw
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LET START () BE %~Yo{4mHs
$( ;Nn(
WRITES ("Hello, world!*N") v9f+ {Y%-
$) jEBn"]\D
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Befunge |5~Oh`w
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Brainfuck fI`Ez!w0
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#include <stdio.h> IWo'{pk
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int main(void) 'h$1
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{ W8& )UtWQ
printf("Hello, world!\n"); 01mu6)
return 0; 9k6s
} M(C">L]8
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C++ Q:P)g#suc
#include <iostream> %6Gg&Y$j!
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int main() c6:uM1V{
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std::cout << "Hello, world!" << std::endl; XUP{]w`.Z
return 0; xa)p,
} =;Q/bD->
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C++/CLI cSPQ
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int main() FJ0I&FyWs
{ Jr5S8c|"
System::Console::WriteLine("Hello, world!"); 9QU\J0c/
} : #a
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C# (C Sharp) ;^N
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class HelloWorldApp #da{3>z:
{ 9dNB_
public static void Main() ,b5'<3\
{ t'2A)S
System.Console.WriteLine("Hello, world!"); $#rkvG_w
} qm=U<'b^
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COBOL |^1g*fy?
IDENTIFICATION DIVISION. qm_l#
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PROGRAM-ID. HELLO-WORLD. rO#w(]
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ENVIRONMENT DIVISION. %_|KiW
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DATA DIVISION. D&FDPaJM
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PROCEDURE DIVISION. |Ahf 01
DISPLAY "Hello, world!". kN/YnY*J<
STOP RUN. ,=+t2Bn
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Common Lisp LzL)qdL
(format t "Hello world!~%") Pg}QRCB@
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