“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。 az0=jou<Zl
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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》。 LkS tU)
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以下是用不同语言写成的Hello World程序的几个例子: 8xgBNQdPT
Ada
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with Ada.Text_Io; use Ada.Text_Io; ^]R_t@
procedure Hello is ZF[W<Q
begin 1LRP
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Put_Line ("Hello, world!"); [,AFtg[
end Hello; S*h^7?Bu
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汇编语言 }_zN%Tf~
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x86 CPU,DOS,TASM t,|Apl]
MODEL SMALL O@a OKk
IDEAL &'W7-Z\j-
STACK 100H ?j.a>{
Q!@M/@-Ky
DATASEG |f fHOef
HW DB 'Hello, world!$' K?'m#}]
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CODESEG -^CW}IM{ I
MOV AX, @data w!6{{m
MOV DS, AX E0+L?(;
MOV DX, OFFSET HW mB_?N $K
MOV AH, 09H B+Qf?1f
INT 21H EtN,
MOV AX, 4C00H :5%98V>02
INT 21H bTimJp[b
END s_NY#MPz[
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x86 CPU,GNU/Linux,NASM 0<!9D):Bb
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). q&-mbWBj
;Enter this into "hello.asm" then type: P ljPhAce
;"nasm -f elf hello.asm" #RR;?`,L}
;"ld hello.o -o hello" vkTu:3Qe
;"./hello" 4uOR=+/l
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section .data ;data section declaration K-TsSW$}
msg db 'Hello World!',0AH -@(LN%7!C
len equ $-msg ;string length u'l4=e
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section .text ;code section declaration &@oI/i&0B
global _start ;entry point (start of execution) lOVcXAe}
_start: mov edx,len ;string length YFm%W@
mov ecx,msg ;string start oqF?9<Vgc,
mov ebx,1 ;file handle: stdout % akW43cE
mov eax,4 ;sys_write q x)\{By
int 80h ;kernel system call PzSLE>Q
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mov ebx,0 ;return value U,i_}O3Q
mov eax,1 ;sys_exit .>R`#@+I
int 80h ;kernel system call IsI5c
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x86 CPU,Windows,MASM32 (dSYb&]
.386 )\u%XFPhS
.model flat,stdcall G]rY1f0
option casemap:none t/Io.d
;Include 文件定义 MygAmV&
include windows.inc 9
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include user32.inc '9f0UtT|[
includelib user32.lib >va_,Y}
include kernel32.inc =fRS UtX
includelib kernel32.lib aJ(/r.1G
;数据段 Y`j$7!j
.data L'{W|Xb+
szCaption db 'A MessageBox!',0 ~@c<5 -`{
szText db 'Hello,world!',0 (7G4 v
;代码段 E42)93~C
.code rt*x[5<
start: 88_ef7w
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Bu=1-8@=qs
invoke ExitProcess,NULL iuY,E
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> xS1n,gTA
end start USyc D`
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AWK I+kAy;2
BEGIN { print "Hello, world!" } S~aWun
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BASIC ulsU~WW7r
传统版BASIC(例如GWBASIC): 8<Iq)A]'Z
% vUU
Fub
10 PRINT "Hello, world!" I9qZE=i
20 END _rYW|*cIF
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或在提示符输入: r!Dk_|Cd
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?"Hello, world!":END 4aOz=/x2
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现代版BASIC(例如Quick BASIC): 5]dlD #
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Print "Hello, world!" N0w?c 5>
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以下的语句在Quick BASIC中同样有效: FM6{%}4
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? "Hello,world!" 95'+8*YCY
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:
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BCPL &q<k0_5Q
GET "LIBHDR" Nksm&{=6S
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LET START () BE ,VVA^'+
$( hb;CpA
WRITES ("Hello, world!*N") myfTztJ
$) 6{.U7="
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Befunge U_IGL
"!dlrow olleH">v o.!o4&WH
, fPD.np}
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Brainfuck ExtC\(X;
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< P0}B&B/a:
+++++++++++++++.>.+++.------.--------.>+.>. Fqw4XR_`~
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C Kb+SssF
#include <stdio.h> vgy.fP"@
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int main(void) phH@{mI
{ sA?8i:]O:
printf("Hello, world!\n");
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return 0; iz-z?)%
} q~9-A+n
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C++ ;'{7wr|9
#include <iostream> +ytP5K7
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int main() Y!xPmL^]?
{ ~b]enG5xS4
std::cout << "Hello, world!" << std::endl; >gp53\
return 0; v)O0i2
} 3/]1m9x
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C++/CLI v Z]j%c@
int main() 4o}{3! m
{ bX2BEa8<"
System::Console::WriteLine("Hello, world!"); ;av!fK
} Dc0=gq0
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C# (C Sharp) `C: 7N=9
class HelloWorldApp D'!JV1Q
{ z"mVE T
public static void Main() \
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{ OD~Q|I(j
System.Console.WriteLine("Hello, world!"); t4UK~ {gh
} HY5R
} }o:LwxNO
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COBOL FUL3@Gb$UV
IDENTIFICATION DIVISION. |1_$\k9Y&
PROGRAM-ID. HELLO-WORLD. q<3La(^/
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ENVIRONMENT DIVISION. `_cv& "K9f
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DATA DIVISION. 3r+c&^
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PROCEDURE DIVISION. Ph
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DISPLAY "Hello, world!". ~4+Y BN
STOP RUN. 'sIne>
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Common Lisp K@=u F1?
(format t "Hello world!~%") pv0|6X?J"
}+m4(lpl
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DOS批处理 2 %fcDEG/
@echo off >/\TG8t,f
echo "Hello, world!" Crc6wmp
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s~Ivq+ipr;
Eiffel k-jFT3b$
class HELLO_WORLD S6M7^_B4F
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creation yFk|8d-|
make _k]R6V:
feature R5e[cC8o.
make is <VD7(j]'^
local ;N.dzH2yA
io:BASIC_IO ggPGKY-b=
do &*/= `=:C8
!!io =b*GV6b
io.put_string("%N Hello, world!") h'S0XU
;
end -- make TP#Ncqh
end -- class HELLO_WORLD Io<T'K
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Erlang fUf1G{4
-module(hello). %iNgHoH
-export([hello_world/0]). F-ZTy"z
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hello_world() -> io:fwrite("Hello, World!\n"). qnyacI
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Forth .$peq
." Hello, world!" CR awR !=\
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Fortran (L4llZ;q
WRITE(*,10) Vp; `!+z"
10 FORMAT('Hello, World!') +mBS&FK
STOP to).PI?
END r&xIVFPI[
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HTML F^{31iU~CX
<HTML> zf)*W#+
<HEAD> 4r_*: $g
<TITLE> Hello World! </TITLE> Jq)k5X>&Sj
</HEAD> *J^FV^E``
<BODY> 3}V (8
<p>Hello World!</p> <;#gcF[7>
</BODY> Qa/1*Mb
</HTML> Kh4rl)L*+%
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