“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。 s`63
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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》。 3UX/
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以下是用不同语言写成的Hello World程序的几个例子: }3DZ`8u
Ada abgAUg)
with Ada.Text_Io; use Ada.Text_Io; X<*-d6?gD`
procedure Hello is L63B# H"
begin M?QK4Zxb6U
Put_Line ("Hello, world!"); |q+dTy_n
end Hello; |[B JZ
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汇编语言 c*c 8S~6
C>gC99
x86 CPU,DOS,TASM x3L0;:Fx8P
MODEL SMALL ^|j
@' @L
IDEAL *<"#1H/q
STACK 100H GJo`9
oT}-i [=}
DATASEG :% m56
HW DB 'Hello, world!$' }xG~a=,
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CODESEG PC55A1(T
MOV AX, @data 'irHpN6n
MOV DS, AX nKu)j3o`
MOV DX, OFFSET HW Vu1swq)l
MOV AH, 09H 1 LUvs~Qu
INT 21H N*NGC!p`N
MOV AX, 4C00H yZyB.wT
INT 21H oH>G3n|U^
END L+N;mI8
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dc=~EG-_rM
x86 CPU,GNU/Linux,NASM 3@8Zy:[8<
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 1h,m
;Enter this into "hello.asm" then type: oa
q!<lI
;"nasm -f elf hello.asm" dm`:']?
;"ld hello.o -o hello" f C_H0h3
;"./hello" qw35LyL
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section .data ;data section declaration "IuPg=|#
msg db 'Hello World!',0AH \F5d
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len equ $-msg ;string length 8=Aoj%l#
W%_Cda5,
section .text ;code section declaration eH' J
global _start ;entry point (start of execution) 'eDV-cB
_start: mov edx,len ;string length %RD%AliO}K
mov ecx,msg ;string start t1rAS.z&
mov ebx,1 ;file handle: stdout +
X0db
mov eax,4 ;sys_write -hpC8YS
int 80h ;kernel system call 0Ma3
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mov ebx,0 ;return value W>cHZ. _
mov eax,1 ;sys_exit Y'eE({)<K
int 80h ;kernel system call s_RUb
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x86 CPU,Windows,MASM32 w3E#v&"=Y
.386 -![>aqWmj1
.model flat,stdcall </-aG[Fi
option casemap:none U{?#W
;Include 文件定义 ibL
include windows.inc JthW"{E
include user32.inc "R
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includelib user32.lib o%_Hmd;_'
include kernel32.inc dSPye z
includelib kernel32.lib Uf\,U8U B
;数据段 \@F~4,VT
.data |Q*OA
szCaption db 'A MessageBox!',0 HBiUp$(mB
szText db 'Hello,world!',0 nz_1Fu>g|
;代码段 >(BAIjF
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.code 0jmPj
start: (!"&c*
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invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK :{'%I#k2
invoke ExitProcess,NULL }+dDGFk
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ;+(EmD:Q
end start . g8db d
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AWK MCO`\"`l
BEGIN { print "Hello, world!" } ~Sc{\ZJl
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BASIC zn2Qp
传统版BASIC(例如GWBASIC): Dg'BlrwbR
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10 PRINT "Hello, world!" {2=f,,|+f
20 END i&Xjbcbp
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或在提示符输入: AEE&{_[S
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?"Hello, world!":END hzV= 7
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现代版BASIC(例如Quick BASIC): k r ga!,I
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Print "Hello, world!" J e.%-7f
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以下的语句在Quick BASIC中同样有效: -a`PW
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? "Hello,world!" TaNcnAY>9
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9*;OHoD h
BCPL <Oihwr@5<
GET "LIBHDR" 7;3;8Q FX
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LET START () BE D]NJ^.X
$( qj1Fj
WRITES ("Hello, world!*N") 1dl(`=^X
$) v/[*Pze,C
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Befunge Yc2dq e>
"!dlrow olleH">v 0}qnq"
, fp?cb2'7
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Brainfuck \kEC|O)8
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< a_U[!`/w
+++++++++++++++.>.+++.------.--------.>+.>. q:<vl^<j
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C J L!:`#\
#include <stdio.h> 0;Z] vl/|
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int main(void) |{9&!=/qf
{ -s&7zqW
printf("Hello, world!\n"); ^k5# {?I
return 0; 4gh`
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} l9vJ]
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C++ $5N\sdyZxg
#include <iostream> s}g3*_"
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int main() ]:}x 4O#
{ O~4Q:#^c
std::cout << "Hello, world!" << std::endl; *yqke<o9)
return 0; k~IRds@G
} h{VdW}g
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C++/CLI 9" cyZO
int main() \e' oAhM
{ yII+#?D
System::Console::WriteLine("Hello, world!"); X6so)1jJ
} N4$ K{
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C# (C Sharp) r;@"s g
class HelloWorldApp c!]Q0ib6
{ Svt%*j
public static void Main() vY);7
{ NS){D7T
System.Console.WriteLine("Hello, world!"); +c' n,O~3
} GsU.Lkf
} Yd]
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COBOL qflOi8
IDENTIFICATION DIVISION. .$a|&P=S
PROGRAM-ID. HELLO-WORLD. jKb4d9aX
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ENVIRONMENT DIVISION. BMItHn].
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DATA DIVISION. N*SUA4bnuM
N9 TM
PROCEDURE DIVISION.
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DISPLAY "Hello, world!". +2g}wH)l
STOP RUN. &"d
:+!4h
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Common Lisp GjyTM
(format t "Hello world!~%") Uj^Y\w-@Z
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DOS批处理 Q}|0
@echo off g=jB'h?
echo "Hello, world!" wU-Cb<^
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6W9lKD_i
Eiffel sNZOm $
class HELLO_WORLD zqxN/H]z
IwR=@Ne8
creation uTvf[%EHW
make z`sW5K(A
feature zvwv7JtB
make is ~^>g<YR[
local \m(>Q
io:BASIC_IO kH?PEA! \
do #>2cfZ`6'J
!!io !'Ww%ZL\
io.put_string("%N Hello, world!") _ME?o
end -- make Awe'MG p%
end -- class HELLO_WORLD WS"v"J%
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Erlang |-xKH.'n
-module(hello). f!G%$?]
-export([hello_world/0]). cFHSMRB|P
'y7<!uo?
hello_world() -> io:fwrite("Hello, World!\n"). dTqL[?wH?
Mo\nY5
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Forth 5uU{!JuSa
." Hello, world!" CR F6"Qs FG
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Fortran m}+_z^@j9
WRITE(*,10) a>S-50
10 FORMAT('Hello, World!') ~>$z1o&}.
STOP mV}eMw
END 'grb@+w(
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