“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。 #`o]{UfW
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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》。 lO/?e!$
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以下是用不同语言写成的Hello World程序的几个例子: 8<:.DFq
Ada rE?Fp
with Ada.Text_Io; use Ada.Text_Io; )aAKxC7w
procedure Hello is Ka/ *Z4"
begin k];NTALOG
Put_Line ("Hello, world!"); r7Zx<c
end Hello; oY<R[NYKu
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汇编语言 nm#,oX2C
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x86 CPU,DOS,TASM .C\##
MODEL SMALL ZwOX ,D
IDEAL %CIRN}
STACK 100H b <z)4
?:DUsg
DATASEG 9/#?]LJ
HW DB 'Hello, world!$' !]C=5~BBI
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CODESEG ~A@HW!*Z@
MOV AX, @data \'CA:9V}
MOV DS, AX 6olJ7`*
MOV DX, OFFSET HW brEA-xNWQ
MOV AH, 09H 952l1c!
INT 21H y8j6ttQv=t
MOV AX, 4C00H 0vZ49}mb)
INT 21H iHKX#*
END l05'/duuJ
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x86 CPU,GNU/Linux,NASM /Ref54
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). A/!"+Yfw
;Enter this into "hello.asm" then type: a.2Xl}2o5
;"nasm -f elf hello.asm" >
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;"ld hello.o -o hello" N?2C*|%f
;"./hello" RXRoMg!-P
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section .data ;data section declaration B}+li1k
msg db 'Hello World!',0AH D{rM
len equ $-msg ;string length -*$ s ;G#
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section .text ;code section declaration .'PS L
global _start ;entry point (start of execution) Mp?L9
_start: mov edx,len ;string length dJ{q}U
mov ecx,msg ;string start ^*"i
*e
mov ebx,1 ;file handle: stdout NXX/JJ+w
mov eax,4 ;sys_write 3X%h?DC
int 80h ;kernel system call *WfQi8
89x;~D1
mov ebx,0 ;return value \Oxyc}&
mov eax,1 ;sys_exit X?U'GLm
int 80h ;kernel system call '
eh }t
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o Vpq*"
x86 CPU,Windows,MASM32 u|cP&^S
.386 [\qclW;L
.model flat,stdcall SuXeUiK.[
option casemap:none "hk {"0E
;Include 文件定义 bXSAZWf
include windows.inc GOOm] ]I
include user32.inc qKrxln/T
includelib user32.lib us E%eF]
include kernel32.inc !t+ 3DMPn
includelib kernel32.lib M!aJKpf
;数据段 ~=Q^]y,
.data ~F8xXW0
szCaption db 'A MessageBox!',0 msY6zJc`
szText db 'Hello,world!',0 W{c
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;代码段 '&nQ~=3
.code bct8~dY
start: _+.JTk
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 1m5*MY
invoke ExitProcess,NULL 0Py*%}r1
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ,q;?zcC7
end start md,KRE
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BEGIN { print "Hello, world!" } 0U~*uDU
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BASIC )xiu
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传统版BASIC(例如GWBASIC): e^'|<0J
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10 PRINT "Hello, world!" QYi4A"$`
20 END fY6~Z
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或在提示符输入: uaz!ze+
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?"Hello, world!":END yRIXUCy
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现代版BASIC(例如Quick BASIC): [Ky3WppR
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Print "Hello, world!" x|O^#X(,
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以下的语句在Quick BASIC中同样有效: {VKFw=$8
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? "Hello,world!" zgH(/@P
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=#v? }JG
BCPL s*s~yH6
GET "LIBHDR" X6",Xr!{
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LET START () BE ,2^4"gIl
$( ]8}51y8
WRITES ("Hello, world!*N") 6pSi-FH
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Befunge tq}45{FH3
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C -cM1]soT
#include <stdio.h> u0c}[BAF
Jsysk $R
int main(void) lI 4tW=
{ l2qvYNMw
printf("Hello, world!\n"); )](ls@*
return 0; Ic9L@2m
} 3o%vV*
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C++ ]xr0]
#include <iostream> RZzHlZ
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int main() IHni1
{ y:W6;R
std::cout << "Hello, world!" << std::endl; G
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return 0; d )O^(y1r
} (4T0U5jgT
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C++/CLI ?vFy3
int main() #wI}93E
{ D\AVZ76F1
System::Console::WriteLine("Hello, world!"); "XR=P>
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} u^~7[OkE
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C# (C Sharp) iT>u&0B-
class HelloWorldApp zuV%`n
{ 9 {&g.+
public static void Main() jYHn J}<
{ ]YgR
System.Console.WriteLine("Hello, world!"); H<(F$7Q!\
} D\acA?d`
} ~U0%}Bbh
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COBOL ;6W ]f([
IDENTIFICATION DIVISION. #ibwD:{
PROGRAM-ID. HELLO-WORLD. J~m$7T3Af
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ENVIRONMENT DIVISION. BJj'91B[d
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DATA DIVISION. Q$E.G63Wl
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PROCEDURE DIVISION. LwC?t3n
DISPLAY "Hello, world!". o,*m,Qc
STOP RUN. A2|Bbqd
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Common Lisp .z>/A/&+
(format t "Hello world!~%") |+Y-i4t
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DOS批处理 /Q1 b%C
@echo off :Y99L)+=/
echo "Hello, world!" ~H}Z;n]H
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C- YYG
Eiffel )Te\6qM
class HELLO_WORLD =XfvPBA
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creation @]Jq28
make |]&3*%b@
feature Wg|6{'a
make is opfnIkCe
local La ?A@SD
io:BASIC_IO 56pj(}eq
do V IzIl\<aM
!!io 0~nX7
io.put_string("%N Hello, world!") ,RPb<3
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end -- make $bE"3/uf
end -- class HELLO_WORLD fbApE
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Erlang awzlLI<2p
-module(hello). C6e5*S
-export([hello_world/0]). MHpGG00,
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hello_world() -> io:fwrite("Hello, World!\n"). 3o rSk
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Forth eEqcAUn
." Hello, world!" CR nAQ[
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Fortran JrBPx/?(,;
WRITE(*,10) /
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10 FORMAT('Hello, World!') Y$OE[nGi%X
STOP :a8Sy("
END %RW*gUvc]
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HTML ZKI8x1>Iq
<HTML> zW`Hqt;
<HEAD> H7uh"/A
<TITLE> Hello World! </TITLE> ~vYFQKrb
</HEAD> dsX"S;`v
<BODY> 3=wcA/"!
<p>Hello World!</p> n{W(8K6d@[
</BODY> :"y2u
</HTML> TTO8tT3[6}
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!}}
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INTERCAL ;QVTb3Th
PLEASE DO ,1 <- #13 ~"*W;|)
DO ,1 SUB #1 <- #238 otaRA
DO ,1 SUB #2 <- #112 r5Q#GY>
DO ,1 SUB #3 <- #112 zjH8S
DO ,1 SUB #4 <- #0 QUkP&