“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。 >/$Fh:R-
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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》。 (.Y/
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以下是用不同语言写成的Hello World程序的几个例子: 1Tp/MV/>
Ada $g9**b@
with Ada.Text_Io; use Ada.Text_Io; oPf)be| #
procedure Hello is x3+oAb@o/
begin I?#85l{>
Put_Line ("Hello, world!"); Hy:V`>
end Hello; YIhm$A"z0"
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汇编语言 #SVNHpx
T=f|,sK +7
x86 CPU,DOS,TASM C G\tQbum
MODEL SMALL `O?T.p)
IDEAL @&F@I3`{
STACK 100H oTjyN\?H
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DATASEG E_z;s3AXQ
HW DB 'Hello, world!$' uQ$^;Pr
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CODESEG ?
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MOV AX, @data B_`y|sn
MOV DS, AX ~T7B$$
MOV DX, OFFSET HW +gd2|`#
MOV AH, 09H ^ >x|z.
INT 21H qVqRf.-\
MOV AX, 4C00H g6t"mkMY
L
INT 21H /hrT
END O43YY2
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x86 CPU,GNU/Linux,NASM lH^^77"4Qo
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). h5_G4J{1
;Enter this into "hello.asm" then type: 0-Y:v(|.
;"nasm -f elf hello.asm" +yob)%
;"ld hello.o -o hello" O=cxNy-I
;"./hello" u6V/JI}g
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section .data ;data section declaration 4BYE1fUzd
msg db 'Hello World!',0AH EI>6Nh
len equ $-msg ;string length \`V$
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'7Nr8D4L
section .text ;code section declaration Y/<lWbj*A
global _start ;entry point (start of execution) '+>fFM,*B
_start: mov edx,len ;string length /
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mov ecx,msg ;string start 7M_U2cd|TD
mov ebx,1 ;file handle: stdout BcjP+$k4_
mov eax,4 ;sys_write q LL,F
int 80h ;kernel system call XKA&XpF
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mov ebx,0 ;return value WL,&-*JAW
mov eax,1 ;sys_exit jxaD&4Fs8
int 80h ;kernel system call >KLtY|o)
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x86 CPU,Windows,MASM32 6Tw#^;q-
.386 GPhl4#'
.model flat,stdcall X=JmF97
option casemap:none GDhE[of
;Include 文件定义 4D%9Rc0 G
include windows.inc anw}w!@U
include user32.inc #PDf,^
includelib user32.lib SKuIF*"!S
include kernel32.inc )0vU
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includelib kernel32.lib EFuvp8^y
;数据段 W!blAkM%i
.data =p^He!
szCaption db 'A MessageBox!',0 jr7C}B-Fb^
szText db 'Hello,world!',0 87%*+n:?*
;代码段 YIt& >
.code jc[_I&Oc_
start: 8[CB>-9
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK OdWou|Gz
invoke ExitProcess,NULL xqXDxJlns
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> t>GfM
end start Ok7t@l$
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BEGIN { print "Hello, world!" } \~d";~Y`
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BASIC [%50/_h
传统版BASIC(例如GWBASIC): IKtB;
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10 PRINT "Hello, world!" hUQ,z7-
20 END &
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或在提示符输入: =1I#f
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?"Hello, world!":END +x9cT G
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现代版BASIC(例如Quick BASIC): .6O"|
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Print "Hello, world!" gj\)CBOv
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以下的语句在Quick BASIC中同样有效: W"{v2x i
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? "Hello,world!" mNf8kwr
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BCPL [S.ZJUns
GET "LIBHDR" RT93Mt%P
kt[:@Nda9
LET START () BE wxm:7$4C
$( tx"sH]n
WRITES ("Hello, world!*N") lnovykR
$) E^GHVt/.
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a $"ib
Befunge 87}&`
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Brainfuck Tu{h<Zy
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< )!g{Sbl
+++++++++++++++.>.+++.------.--------.>+.>. KZ!3j_pKy
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C J};z85B
#include <stdio.h> 2<&Bw2
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int main(void) Om M=o*d
{ LG~S8u
printf("Hello, world!\n"); JKer//ng4
return 0; 9Rm/V5
} f<+4rHT
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C++ th6+2&B6
#include <iostream> QDpEb=|S
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int main() &t5{J53
{ !-m&U4Ku6o
std::cout << "Hello, world!" << std::endl; 'Dvv?>=&
return 0; mh<=[J,%p
} :Rs^0F8)c
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C++/CLI t}v2$<!I
int main() i"|$(2
{ bs9aE<j
System::Console::WriteLine("Hello, world!"); |
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} T&86A\D\z
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C# (C Sharp) K^_i%~
class HelloWorldApp 9]t[J_YM
{ [D5t{[i
public static void Main() 7_2kDDW0
{ <foCb%$(?
System.Console.WriteLine("Hello, world!"); %>g W9}kB
} y9#$O(G
} SXao|{?O
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tpy>OT$
COBOL 6#j$GH *
IDENTIFICATION DIVISION. $3Z-)m
PROGRAM-ID. HELLO-WORLD. kNu'AT#3|
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ENVIRONMENT DIVISION. 9N%JP+<89
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DATA DIVISION. .I}:m%zv
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PROCEDURE DIVISION. =8gHS[
DISPLAY "Hello, world!". .1 %T
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STOP RUN. C"lJl k9g^
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Common Lisp UpXz&k
(format t "Hello world!~%") \7"@RHcihB
y7KzW*>g:
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DOS批处理 yqSs,vz
@echo off Tz2-Bp]h
echo "Hello, world!" X7L8h'(@
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Eiffel 6Es?
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class HELLO_WORLD azjEq$<M
y2O4I'/5<
creation nUq<TJ
make [![%9'+P
feature c*d9'}E
make is 3:%QB9qc]'
local j@Qg0F
io:BASIC_IO Og;-B0,A
do EBtLzbj
!!io #d{=\$=
io.put_string("%N Hello, world!") G8W#<1LE
end -- make RtG}h[k/X
end -- class HELLO_WORLD ^IKO2Ft
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