“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。 |V7*l1
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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》。 J,6yYIq
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以下是用不同语言写成的Hello World程序的几个例子: $`'/+x"%
Ada *n"{J(Jt`
with Ada.Text_Io; use Ada.Text_Io; /wlEe>i
procedure Hello is (Awm9|.{+
begin {7pli{`
Put_Line ("Hello, world!"); ~bpgSP"
end Hello; HLi%%"'
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汇编语言 7>*vI7O0l
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x86 CPU,DOS,TASM _Bj":rzY
MODEL SMALL ]J]h#ZHx
IDEAL lk80#( :Z
STACK 100H SZCze"`[
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DATASEG Ef{Vp;]
HW DB 'Hello, world!$' 9(<@O%YU
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CODESEG pI<f) r
MOV AX, @data h!9ei6
MOV DS, AX @9|hMo
MOV DX, OFFSET HW 5Jnlz@P9
MOV AH, 09H IO:G1;[/2L
INT 21H %e} Saf
MOV AX, 4C00H `~q <N
INT 21H 13/]DF,S"^
END P{^6v=8)
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x86 CPU,GNU/Linux,NASM seeBS/%
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ZqO^f*F>h
;Enter this into "hello.asm" then type: 18:%~>.!
;"nasm -f elf hello.asm" 0+b1vhQ
;"ld hello.o -o hello" #C@FYOf*
;"./hello" ,5<Cd,`*
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section .data ;data section declaration 3"\l u?-E
msg db 'Hello World!',0AH Pj%|\kbNs
len equ $-msg ;string length VJll
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section .text ;code section declaration mpJ#:}n
global _start ;entry point (start of execution) D^;Uq8NDKq
_start: mov edx,len ;string length <1M-Ro?5k
mov ecx,msg ;string start Aq7osU1B
mov ebx,1 ;file handle: stdout 0_t!T'jr7
mov eax,4 ;sys_write qJUK_6|3
int 80h ;kernel system call D.XvG _
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mov ebx,0 ;return value geCM<]
mov eax,1 ;sys_exit |P}y,pNQ
int 80h ;kernel system call G,w(d@
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x86 CPU,Windows,MASM32 >[*qf9$
.386 H$4:lH&(
.model flat,stdcall lnR{jtWP
option casemap:none IPo?:1x]s
;Include 文件定义 cYt!n5w~W
include windows.inc N87B8rDl
include user32.inc C;urBsC
includelib user32.lib q'82qY
include kernel32.inc !C:$?oU
includelib kernel32.lib =rX>.P%Q 5
;数据段 ^gnZ+`3
.data c0u^zH<
szCaption db 'A MessageBox!',0 E?0%Z&1h
szText db 'Hello,world!',0 XOS[No~
;代码段 %bfQ$a:
.code D}X\Ca"h
start: CzEd8jeh7
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK _a T5jR=
invoke ExitProcess,NULL y
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;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> X}\:_/
end start k\GcHI-
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AWK Npy:!
BEGIN { print "Hello, world!" } 9;-p'C
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BASIC %d<"l~<5;
传统版BASIC(例如GWBASIC): D!IY&H,wo
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10 PRINT "Hello, world!"
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20 END pg)WKbV
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或在提示符输入: 5]Y?m'
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?"Hello, world!":END kL"2=7m;
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现代版BASIC(例如Quick BASIC): I4i>+:_J
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Print "Hello, world!" @r/nF5
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以下的语句在Quick BASIC中同样有效: &FN.:_E
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? "Hello,world!" _>X+ZlpU:
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BCPL b2&0Hx
GET "LIBHDR" vnZC,J `
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LET START () BE ZX./P0
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WRITES ("Hello, world!*N") .5ha}=z
$) .jWC$SVR
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Befunge N U`
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#include <stdio.h> UJ')I`zuI
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int main(void) PP33i@G
{
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printf("Hello, world!\n"); [~c|mOk
return 0; a'yK~;+_9
} ML56k~"BL
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C++ h^(*Tv-!
#include <iostream> +E(L \
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int main() |~mOfuQb
{ ra
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std::cout << "Hello, world!" << std::endl; O`t&ldU
return 0; l L@XM2"
} y(yHt=r
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C++/CLI -3Z,EaG^
int main() 1JG'%8}#8
{ L2i_X@/
System::Console::WriteLine("Hello, world!"); ~YWQ2]
} w;:*P
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C# (C Sharp) r1{@Ucw2
class HelloWorldApp ">,|V-H
{ LG|fq/;
public static void Main() czgO ;3-C
{ "
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System.Console.WriteLine("Hello, world!"); yEoF4bt
} Ww+IWW@
} 2*l/3VW
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COBOL paE[rS\
IDENTIFICATION DIVISION. 3J|F?M"N7
PROGRAM-ID. HELLO-WORLD. }?_?V&K|
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ENVIRONMENT DIVISION. By",rD- r
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DATA DIVISION. SBk4_J/_
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PROCEDURE DIVISION. ep)n_!$OH"
DISPLAY "Hello, world!". 17"uf.G
STOP RUN. N gGp
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Common Lisp S3*`jF>q
(format t "Hello world!~%") h-K_Lr]
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DOS批处理 lc1(t:"[
@echo off qUW!
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echo "Hello, world!" 4=.89T#<
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Eiffel oC: {aK6\
class HELLO_WORLD G+"t/?/
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creation :B5Fdp3
make RVA(Q[ ;
feature Val|n*%
make is :W.(S6O(
local p\tm:QWD;
io:BASIC_IO
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do rIu$pZO
!!io S\YTX%Xm}
io.put_string("%N Hello, world!") gw3K+P
end -- make %G/hD
end -- class HELLO_WORLD ^?7-r6
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Erlang s_OF( o
-module(hello). ~IfJwBn-i
-export([hello_world/0]). n&;85IF1
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hello_world() -> io:fwrite("Hello, World!\n"). HIR~"It$
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Forth ;!mzyb*
." Hello, world!" CR L:pYn_
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Fortran vrhT<+q
WRITE(*,10) JPc+rfF
10 FORMAT('Hello, World!') $%CF8\0
STOP sV{,S>s
END Sw8]EH6
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HTML 7uS~MW
<HTML> 0w\zLU
<HEAD> l|~A#kq
<TITLE> Hello World! </TITLE> vMi;+6'n>
</HEAD> Jr
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<BODY> `iAF3:
<p>Hello World!</p> "$Z= %.3Q
</BODY> Vod\a5c
</HTML> dGYn4i2k?
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INTERCAL i&Tbz!
PLEASE DO ,1 <- #13 uGf@
DO ,1 SUB #1 <- #238 (
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DO ,1 SUB #2 <- #112 3s,g*
DO ,1 SUB #3 <- #112 7a=gH2]&
DO ,1 SUB #4 <- #0 */)c?)"
DO ,1 SUB #5 <- #64 o/$}
DO ,1 SUB #6 <- #238 av}k)ZT_
DO ,1 SUB #7 <- #26 <
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DO ,1 SUB #8 <- #248 SO|NaqWa
DO ,1 SUB #9 <- #168 QuF:p
DO ,1 SUB #10 <- #24 hLd^ agX
DO ,1 SUB #11 <- #16 TluW-S
DO ,1 SUB #12 <- #158 zU kgG61
DO ,1 SUB #13 <- #52 dUeN*Nq&(,
PLEASE READ OUT ,1 )BZ.Sv
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Java p*R;hU
public class Hello }{K)
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{ W7R<