“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。 4M7^
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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》。 V>r j$Nc]
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以下是用不同语言写成的Hello World程序的几个例子: wM0E%6
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Ada u
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with Ada.Text_Io; use Ada.Text_Io; Q~b_dx{m
procedure Hello is 4Lw'v: (
begin x.o3iN[=
Put_Line ("Hello, world!"); YMK>+y[+4
end Hello; sjcQaF`=
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汇编语言 {RH*8?7
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x86 CPU,DOS,TASM |w4(rs-
MODEL SMALL l%@dE7<Z
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STACK 100H E::<;9
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DATASEG K: 4P;ApI
HW DB 'Hello, world!$' uZ-`fcCjD
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CODESEG }Py<qXH
MOV AX, @data _En]@xK3&
MOV DS, AX EL"4E',
MOV DX, OFFSET HW ~%/'0}F
MOV AH, 09H LK{a9`
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INT 21H uFWvtL?;_
MOV AX, 4C00H 5"[yFmP*
INT 21H VSx%8IM+X
END vmMV n-\#
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x86 CPU,GNU/Linux,NASM Up'."w_zE
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). a~6ztEhGm
;Enter this into "hello.asm" then type: <e[!3,%L
;"nasm -f elf hello.asm" 3JTU^ -S<
;"ld hello.o -o hello" 9W$mDw6f
;"./hello" E
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section .data ;data section declaration {Qm6?H
msg db 'Hello World!',0AH ?F9hDLX
len equ $-msg ;string length
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section .text ;code section declaration $,g 3*A
global _start ;entry point (start of execution) BSjbnnW}"
_start: mov edx,len ;string length 8Er[M
mov ecx,msg ;string start 7G?Ia%u
mov ebx,1 ;file handle: stdout y{:]sHyG
mov eax,4 ;sys_write PMD,8] |
int 80h ;kernel system call X
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mov ebx,0 ;return value G[vUOEU~O
mov eax,1 ;sys_exit a
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int 80h ;kernel system call g<0w/n!jmC
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x86 CPU,Windows,MASM32 ZWov_
.386 ^Kb9@lz/
.model flat,stdcall _T_PX$B
option casemap:none )H.ubM1
;Include 文件定义 EUJ1RhajF
include windows.inc kbD*=d}3{
include user32.inc &Jrq5Q C
includelib user32.lib ,>:XE@xcp
include kernel32.inc |dW2dQ
includelib kernel32.lib buc,M@>
;数据段 F]hx
.data dCW0^k
szCaption db 'A MessageBox!',0 {K< ~
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szText db 'Hello,world!',0 lR|$*:+
;代码段 6JUav."`~
.code iXt4|0
start: xU#]w6
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK z<FV1niE
invoke ExitProcess,NULL ^)(G(=-Rf
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> u Eu6f
end start n$nne6|O
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BEGIN { print "Hello, world!" } tU8g(ep,o
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BASIC BDarJY
传统版BASIC(例如GWBASIC): `;zu1o
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10 PRINT "Hello, world!" i528e{&
20 END _%AJmt}
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或在提示符输入: d#X&Fi
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?"Hello, world!":END ;9 =}_h)]
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现代版BASIC(例如Quick BASIC): 9_g>BI;"8
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Print "Hello, world!" /zChdjz
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以下的语句在Quick BASIC中同样有效: COxZ
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? "Hello,world!" +!mNm?H[!
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GET "LIBHDR" ]1YYrgi7
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LET START () BE D2hAlV)i(
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WRITES ("Hello, world!*N") zsR wF
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Befunge 9Bbm7Gd
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#include <stdio.h> ,6cbD
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int main(void) _oMs
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{ 5JXzfc9rL
printf("Hello, world!\n"); u"Hd55"&
return 0; /
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} ]$XBd{\D{
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C++ i;uG:,ro
#include <iostream> Gdc~Lh
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int main() !h`cXY~w
{
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std::cout << "Hello, world!" << std::endl; w<I5@)i|
return 0; *`QdkVER
} ~L4*b*W
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C++/CLI e&FX7dsyy
int main() a|]%/[G@
{ $2 +$,:
System::Console::WriteLine("Hello, world!"); &t9XK 8S
} / ut~jf`
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C# (C Sharp) N('S2yfDR
class HelloWorldApp )N%1%bg^-
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public static void Main() MK!]y8+Z
{ Ztpm_P6
System.Console.WriteLine("Hello, world!"); c9cphZ(z
} 5@r_<J<>
} yv#c=v|
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COBOL m_PrasZ>
IDENTIFICATION DIVISION. 9L)&n.t1
PROGRAM-ID. HELLO-WORLD. r-\T}e2Gz
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ENVIRONMENT DIVISION. dg'CHxU
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DATA DIVISION. E=tx.h4xG~
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PROCEDURE DIVISION. \4`saM /x
DISPLAY "Hello, world!". %RT6~0z
STOP RUN. J!TK*\a2
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Common Lisp ,P; a/{U
(format t "Hello world!~%") [/fwt!
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DOS批处理 ^&Rxui
@echo off T$N08aju#
echo "Hello, world!" _QOOx+%*5
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Eiffel 6UzT]" LR;
class HELLO_WORLD j
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creation @qr3v>3X<
make E't G5,/m
feature lo]B5_en
make is ~"<VUJ=Ly:
local p?`|CE@h7
io:BASIC_IO L_zmU_zD
do [Yahxw}
!!io
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io.put_string("%N Hello, world!") lWyP[>*
end -- make ^6NABXL
end -- class HELLO_WORLD w]5f3CIm
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Erlang &T{B~i3w8
-module(hello). R82Zr@_
-export([hello_world/0]). 3
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hello_world() -> io:fwrite("Hello, World!\n"). V]S06>P
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Forth /CQQ^/
." Hello, world!" CR @2Y]p.$q
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Fortran (+Nmio
WRITE(*,10) 8IIdNd
10 FORMAT('Hello, World!') Sy0s`\[
STOP [sO<6?LY
END <"|<)BGeI
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HTML
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<HTML> WSB|-Qj}W
<HEAD> M(]|}%
<TITLE> Hello World! </TITLE> 'JKvy(n>
</HEAD> u1|Y;*
<BODY> 2T2#HP
<p>Hello World!</p> A`U 2HC
</BODY> \#oV<MR
</HTML> Ckl]fy@D}
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INTERCAL cZK?kz_Y
PLEASE DO ,1 <- #13 n,'AFb4AF
DO ,1 SUB #1 <- #238 }m
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DO ,1 SUB #2 <- #112 "BNmpP
DO ,1 SUB #3 <- #112 >_%g8T'
DO ,1 SUB #4 <- #0 SrU
DO ,1 SUB #5 <- #64 *CD=cmdD*
DO ,1 SUB #6 <- #238 bDh(;%=
DO ,1 SUB #7 <- #26 0c;"bA0>Sx
DO ,1 SUB #8 <- #248 o!dkS/u-m
DO ,1 SUB #9 <- #168 =
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DO ,1 SUB #10 <- #24 DmpJzHj|
DO ,1 SUB #11 <- #16 ]8cX#N,M
DO ,1 SUB #12 <- #158 +CHO0n
DO ,1 SUB #13 <- #52 c94PWPU
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PLEASE GIVE UP 3&d+U)E
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Java ; 8x^9Q
public class Hello /(L1!BPP9m
{ D)eKq!_
public static void main(String[] args) ?lna8]t
{ e&7}N Za
System.out.println("Hello, world!"); ~#x!N=q
} (C[S?@S
} ,&l