“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。 Jd&Qi)1
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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》。 :q;vZ6Xd
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以下是用不同语言写成的Hello World程序的几个例子: SS
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Ada P f6rr9
with Ada.Text_Io; use Ada.Text_Io; b0x9}
procedure Hello is d#I'9O0&
begin V>@NkQ<|y
Put_Line ("Hello, world!"); 1;SW%\M
end Hello; CBs0>M/
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汇编语言 O9A.WSJ
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x86 CPU,DOS,TASM >AV-i$4eQ@
MODEL SMALL =bZ>>-<
IDEAL z>vzXM
STACK 100H k5xzC&
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DATASEG =iRc&
HW DB 'Hello, world!$' C$aiOK-]+
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CODESEG Z5[ t/
MOV AX, @data fa/
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MOV DS, AX ai`fP{WlX
MOV DX, OFFSET HW 9X@y*;w<t
MOV AH, 09H 8Y
sn8
INT 21H MT$OjH'Q`
MOV AX, 4C00H @?3u|m |Z
INT 21H 8 ]dhNA5
END \UGs_5OT
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x86 CPU,GNU/Linux,NASM '- 4);:(^
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). [}9R9G>"
;Enter this into "hello.asm" then type: jWiB_8-6
;"nasm -f elf hello.asm" 5X|=qZ
;"ld hello.o -o hello" iwJBhu0@#
;"./hello" EW0H"YIC
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section .data ;data section declaration C"<l}
msg db 'Hello World!',0AH <!Nj2>
len equ $-msg ;string length :'f#0 ox
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section .text ;code section declaration %TPnC'2
global _start ;entry point (start of execution) nDkyo>t.
_start: mov edx,len ;string length R6h(mPYA
mov ecx,msg ;string start @PZ&/F^
mov ebx,1 ;file handle: stdout vE>J@g2#
mov eax,4 ;sys_write %^p1ax
int 80h ;kernel system call {uL<$;#i
E&#AX:
mov ebx,0 ;return value H"WkyvqXb
mov eax,1 ;sys_exit -F/"W
int 80h ;kernel system call Gz+Bk5#{
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x86 CPU,Windows,MASM32 pOyM/L
.386 \d&j`UVY
.model flat,stdcall LU?X|{z
option casemap:none xA`Q4"[I
;Include 文件定义 ;jfjRcU
include windows.inc /wljbb/s
include user32.inc 9FP6Z[4
includelib user32.lib SWz+.W{KQ"
include kernel32.inc q^JJ5{36e
includelib kernel32.lib oR[,?qu@f
;数据段 ]sd|u[:k
.data R."<he ;
szCaption db 'A MessageBox!',0 R^1sbmwk
szText db 'Hello,world!',0 ]\v'1m"
;代码段 ZK27^oG
.code (Vf&,b@U_
start: !?DPI)
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK U8c0N<j
invoke ExitProcess,NULL 2L[/.|
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (8?t0}#t
end start ua/A &XQx
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BEGIN { print "Hello, world!" } kUUN2
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BASIC @N7X(@O
传统版BASIC(例如GWBASIC): izebQVQO*
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10 PRINT "Hello, world!" IiHl"2+/
20 END o|>2X[T
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或在提示符输入: H1yl88K
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?"Hello, world!":END I5mnV<QA^
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现代版BASIC(例如Quick BASIC): WNrgqyM
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Print "Hello, world!" v?,_SVgAi
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以下的语句在Quick BASIC中同样有效: ^GQ+,0Yy
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? "Hello,world!" ]{jdar^
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GET "LIBHDR" 8~YhT]R=
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LET START () BE H5'/i;
$( {u{n b3/jl
WRITES ("Hello, world!*N") %D< =6suW
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Befunge L:nZ_O;
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#include <stdio.h> {Z%4Pg
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int main(void) M6l S2
{ M:K5r7Q!yv
printf("Hello, world!\n"); 04g=bJ
return 0; OZ##x
} 7%DA0.g
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C++ t M?3oO
#include <iostream> M9so3L<N0
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int main() vdA3
{ h[HFZv~{
std::cout << "Hello, world!" << std::endl; }\Kki
return 0; 0
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} **p|g<wvY*
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C++/CLI bDK%vx!_
int main() vk;]9o j*
{ p+6L qk<
System::Console::WriteLine("Hello, world!"); ,F^Rz.
} R;D|To!
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C# (C Sharp) Ujb7uho
class HelloWorldApp &\K p_ AR
{ wP-BaB$_
public static void Main() Ek#?B6s
{ #>)OLKP
System.Console.WriteLine("Hello, world!"); JSKAlw
} eD<Kk 4){
} _}G1/`09#
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COBOL fT$Fv
IDENTIFICATION DIVISION. gFBMARxi
PROGRAM-ID. HELLO-WORLD. +2&+Gh.h
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ENVIRONMENT DIVISION. Fkq;Q
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DATA DIVISION. \9FWH}|
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PROCEDURE DIVISION. )$Tcip`
DISPLAY "Hello, world!". 6xfG`7Az
STOP RUN. bi=IIVlH
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Common Lisp fQ.{sQ$@h
(format t "Hello world!~%") .PAR
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DOS批处理 )'pc 1I
@echo off W'0(0;+G/j
echo "Hello, world!" 'OERW|BO
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Eiffel jjbw+
class HELLO_WORLD <;T$?J9
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creation |izf|*e
make ;?-`n4B&
feature ]t'bd<O
make is 3aK/5)4|B
local ohy?l
io:BASIC_IO c2$&pZ
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do y%9Q]7&=
!!io x?|C-v
io.put_string("%N Hello, world!") tOu:j [
end -- make Z
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end -- class HELLO_WORLD K9BoIHo
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Erlang 4
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-module(hello). Aj22t
-export([hello_world/0]). |>Xw"]b;
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hello_world() -> io:fwrite("Hello, World!\n"). HJ\CGYmyz
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Forth +]!`>
." Hello, world!" CR h/CF^0m"!
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Fortran v7l4g&