“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。 >qhoGg
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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》。
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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]%'^7#v)
Ada KaGG4?=V
with Ada.Text_Io; use Ada.Text_Io; \6z_;
procedure Hello is fF*{\
begin 6I`Lszs
Put_Line ("Hello, world!"); leSR2os
end Hello; {D9m>B3"{
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汇编语言 w;Jby
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x86 CPU,DOS,TASM fXJbC+
MODEL SMALL }uaRS9d
IDEAL H6I]GcZ$
STACK 100H Bw;LGEHi|
/:],bNb
DATASEG oPPxjag\
HW DB 'Hello, world!$' |0e7<[
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CODESEG gZLzE*NZ
MOV AX, @data 1<ic
5kB
MOV DS, AX |JD"iP:
MOV DX, OFFSET HW 4$^\s5 K
MOV AH, 09H 1>"[b8a/
INT 21H j jLwHJ
MOV AX, 4C00H sWc_,[b
INT 21H s
v}o%
END d|RqS`h
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eumpNF%$
x86 CPU,GNU/Linux,NASM ySEhi_)9^
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Xi~%,~
;Enter this into "hello.asm" then type:
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;"nasm -f elf hello.asm" WK<:(vu.
;"ld hello.o -o hello" Bl"BmUn
;"./hello" tin5.N)"z
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section .data ;data section declaration 7\?0d!
msg db 'Hello World!',0AH IW<nfg
len equ $-msg ;string length BlrZ<\-/
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section .text ;code section declaration 6|-V{
global _start ;entry point (start of execution) hhU:
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_start: mov edx,len ;string length )=vQrMyB
mov ecx,msg ;string start 'q_^28rK
mov ebx,1 ;file handle: stdout D%+cf
mov eax,4 ;sys_write R
rtr\a
int 80h ;kernel system call AsOkOS3
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mov ebx,0 ;return value UHh7x%$n
mov eax,1 ;sys_exit ipThwp9
int 80h ;kernel system call ,sqxxq
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x86 CPU,Windows,MASM32 g$N/pg2>cT
.386 [10y 13
.model flat,stdcall TOe=6Z5h
option casemap:none /#C}1emK
;Include 文件定义 sBLf(Q,
include windows.inc Mt93YD-2+
include user32.inc PqJB&:ZV
includelib user32.lib yDil
include kernel32.inc \[57Dmo
includelib kernel32.lib ,R~{$QUl
;数据段 |v6kZ0B<
.data 3m#/1=@o
szCaption db 'A MessageBox!',0 ^z%ShmM&LZ
szText db 'Hello,world!',0 XJ3p<
;代码段 Ww[Xqmg
.code P,}cH;w6Ck
start: A./VO
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK `v|w&ty*
invoke ExitProcess,NULL 1ab_^P
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ,_N+t:*#0
end start l
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BEGIN { print "Hello, world!" } l[AQyR1+/
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BASIC D\ ;(BB
传统版BASIC(例如GWBASIC): 5(+PIKCjC
K|{IX^3)V
10 PRINT "Hello, world!" ? +q(,P@*
20 END BIk0n;Kz<L
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或在提示符输入: 8?za&v
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?"Hello, world!":END WP5QA8`3
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现代版BASIC(例如Quick BASIC): 3hi0
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Print "Hello, world!" 3!H&bOF
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以下的语句在Quick BASIC中同样有效: _-M27^\vV
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? "Hello,world!" 5OR2\h!XZt
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BCPL +}.~"
GET "LIBHDR" vR)f'+_Nz
wi gs1
LET START () BE jv4O
$( J_|LGrt})
WRITES ("Hello, world!*N") F+m%PVW:
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Befunge :]rb} 1nLB
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xk:=.Qqh
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Brainfuck %6%~`((4
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Pss$[ %
+++++++++++++++.>.+++.------.--------.>+.>. b4R;#rm
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C mM $|cge"
#include <stdio.h> s;ivoGe}
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int main(void) V'q?+p]
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{ Hh1]\4D,4
printf("Hello, world!\n"); #aua6V!"
return 0; sOyL
} 3!u`PIQv
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C++ +L,V_z
#include <iostream> JE*d-
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int main() 1VR|z
{ VrIR!9%:
std::cout << "Hello, world!" << std::endl; o}p^q:T*
return 0; B{lj.S`mB
} 11((b
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C++/CLI 9Rm\@E
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int main()
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{ jf^BEz5
System::Console::WriteLine("Hello, world!"); EvKzpxCh
} rQD^O4j R
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C# (C Sharp) &e6!/y&
class HelloWorldApp ^?8/9o
{ vk4Q2P
public static void Main() /U
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{ /& W&
System.Console.WriteLine("Hello, world!"); $3=S\jyfK
} ZYS]Et[Q
} |JLXgwML
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COBOL ='t}d>l
IDENTIFICATION DIVISION. {[)n<.n[g
PROGRAM-ID. HELLO-WORLD. vB%os Qm
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ENVIRONMENT DIVISION. 1N}vz(0"
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DATA DIVISION. 4q"4N2
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PROCEDURE DIVISION. o1?S*
DISPLAY "Hello, world!". :2.<JUDM
STOP RUN. 0T7t.
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Common Lisp v&qL r+_7
(format t "Hello world!~%") IG Ax+3V
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DOS批处理 ?2%;VKN4
@echo off U,K=(I7OBX
echo "Hello, world!" wJZuJ(
{e5DQ 21.
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Eiffel /Nkxb&
class HELLO_WORLD 5P{[8PZxbV
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creation ,M9e *
make [w90gp1O[
feature v5F+@ug
make is 7$*X
local TwsI8X
io:BASIC_IO #g/m^8n?s
do \10KIAQ
!!io nb.|^O?
io.put_string("%N Hello, world!") -wT!g;v;%
end -- make unih"};ou
end -- class HELLO_WORLD $^_6,uBM[
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Erlang jV[;e15+
-module(hello). Z(t7QFd
-export([hello_world/0]). !FwNq'Q8$
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hello_world() -> io:fwrite("Hello, World!\n"). pm=m~
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Forth _X|prIOb=
." Hello, world!" CR .DI?-=p|_#
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Fortran }<YU4EW
WRITE(*,10) P{x6e/
10 FORMAT('Hello, World!') %Zp|1J'"
STOP \Si p
END 1F_$[iIX]
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HTML Cs(sar:7
<HTML> Ze[,0Y!u&
<HEAD> ?;y-skh
<TITLE> Hello World! </TITLE> >C19Kie72
</HEAD> z-qbe97
<BODY> *7E#=xb
<p>Hello World!</p> XF+4*),
</BODY> I(Z\$
</HTML> zu.B>INe
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INTERCAL v2I? 5?j
PLEASE DO ,1 <- #13 |RXQ_|
DO ,1 SUB #1 <- #238 _ !E&