“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。 j8[U}~*^
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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》。 6LGl]jHf
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以下是用不同语言写成的Hello World程序的几个例子:
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Ada Qr3!6
with Ada.Text_Io; use Ada.Text_Io; 9cP{u$
procedure Hello is L@6]~[JvP
begin KhB775
Put_Line ("Hello, world!"); eUB!sR%
end Hello; O)VcW/
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汇编语言 *p\Zc*N;%
Kd+E]$F_OH
x86 CPU,DOS,TASM m+s*Io{Ip
MODEL SMALL : q%1Vi
IDEAL tNzO1BK
STACK 100H np6G~0Y`
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DATASEG ^IuhHP
HW DB 'Hello, world!$' a?r$E.W'&
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CODESEG Y]0c%Fd
MOV AX, @data "D_:`@V(
MOV DS, AX *(q?O_3,b
MOV DX, OFFSET HW hZ
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MOV AH, 09H 5yoi;$~}_0
INT 21H M NwY
MOV AX, 4C00H j;_
INT 21H Ul]7IUzsu
END `j)56bR
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x86 CPU,GNU/Linux,NASM l_:P|
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Nr>UZlU8
;Enter this into "hello.asm" then type: b:Zh|-
;"nasm -f elf hello.asm" c]#}#RJ`\
;"ld hello.o -o hello" *.>@
;"./hello" W&
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+O 7(
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section .data ;data section declaration ;#v3C;
msg db 'Hello World!',0AH bs~P
len equ $-msg ;string length C@`#@1X
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section .text ;code section declaration K\U`gTGc
global _start ;entry point (start of execution) IMqe(
_start: mov edx,len ;string length [iq^'E
mov ecx,msg ;string start E#rQJ
mov ebx,1 ;file handle: stdout #9]2Uixq[
mov eax,4 ;sys_write t}h(j|
int 80h ;kernel system call /K&9c
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#<2{
mov ebx,0 ;return value ky[Cx!81C
mov eax,1 ;sys_exit oOI0q_bf
int 80h ;kernel system call L
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x86 CPU,Windows,MASM32 }'x)e
.386 Ka(B&.
.model flat,stdcall '{
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option casemap:none P`Ku.
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;Include 文件定义 Fh)xm* u(
include windows.inc n8;L_43U
include user32.inc -Z,r\9d
includelib user32.lib `Ze$Bd\
include kernel32.inc JX5/PCO
includelib kernel32.lib 0$Rn|yqf%
;数据段 @~ke=w6&pe
.data v%*don
szCaption db 'A MessageBox!',0 ]`x+wWe
szText db 'Hello,world!',0 q`2dL)E
;代码段 ">wvd*w0"(
.code e7xv~C>g
start: o}KVT%}
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK w@,p`
invoke ExitProcess,NULL ?B ,<gen
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> SQK82/
end start Jaw1bUP!oK
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AWK gw,K*ph}q
BEGIN { print "Hello, world!" } vf.MSk?~ar
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BASIC J Y8Rk=
传统版BASIC(例如GWBASIC): -d4v:Jab
7SJ=2
10 PRINT "Hello, world!" u,8)M'UU
20 END klQmo30i
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或在提示符输入: dX1jn;7
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?"Hello, world!":END $)ka1L"N
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现代版BASIC(例如Quick BASIC): ZXb{-b?[`
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Print "Hello, world!" Xv!Gg6v6
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以下的语句在Quick BASIC中同样有效: M("sekL
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? "Hello,world!" <CO_JWD
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BCPL NCi~. I
GET "LIBHDR" >&+V[srfD
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LET START () BE 3;Yd"
$( qdpi-*2
WRITES ("Hello, world!*N") #p*uk
$) L)U*dY
FvVC 2Z
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Befunge |X>'W"Mn
"!dlrow olleH">v dYD;Z<l
, Ve"(}z
^_@ @hA`f4^
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; ,sNRES3
Brainfuck m0^ "fMV
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< %(&ja_oO
+++++++++++++++.>.+++.------.--------.>+.>. H0"'jd
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C <v -YMk@
#include <stdio.h> y(g]:#
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int main(void) %"(HjanH
{ L%$-?O|
printf("Hello, world!\n"); 9b=0
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return 0; Z|*#)<|~
} l9|K,YVW
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C++ T8g\_m
#include <iostream> Ot47.z
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int main() IYq#|^)5+
{ =C,DR4xh
std::cout << "Hello, world!" << std::endl; %.`u2'^
return 0; U'F}k0h?\'
} &'k(v(>n,
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C++/CLI en{p<]H
int main() bs\kb-\R
{ bK#ZY
System::Console::WriteLine("Hello, world!"); qgl-,3GY%N
} 4t =Kt
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C# (C Sharp) {:"<E?+
class HelloWorldApp vzfMME17
{ 25`W"x_
public static void Main() \i,H1a
{ GFPrK9T
System.Console.WriteLine("Hello, world!"); q['D?)sy
} ,_(=w.F
} ~cp=B>*(
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COBOL \9p.I?=
IDENTIFICATION DIVISION. +pT;;
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PROGRAM-ID. HELLO-WORLD. Jxe 5y3*
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ENVIRONMENT DIVISION. "zNS6I?rzE
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DATA DIVISION. l]&A5tz3
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PROCEDURE DIVISION. ,2Ed^!`
DISPLAY "Hello, world!". 6<\dQ+~
STOP RUN. rMJ@oc
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m=E/um[D
Common Lisp Xlug{ Uh
(format t "Hello world!~%") vgtAJp+p*
mz1m^p)~{
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DOS批处理 $H3C/|
@echo off dkEbP*yXg
echo "Hello, world!" xzY/$?
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$~:ZzZO
Eiffel ~DxuLk6
s
class HELLO_WORLD sx+k
V A
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creation fFbJE]jW
make P]}:E+E<.I
feature )Rbt0
make is S9l po_!z
local
{}'Jr1
io:BASIC_IO \2El>>
do r%=a :GdAg
!!io AFsieJ
io.put_string("%N Hello, world!") rusM]Z
end -- make E%E`\mFD
end -- class HELLO_WORLD "&D0Sd@[?
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Erlang 7\$}|b[9
-module(hello). n)a/pO_
-export([hello_world/0]). +fozE?
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hello_world() -> io:fwrite("Hello, World!\n"). ;9)nG,P3
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Forth 7Tr '<(A
." Hello, world!" CR V+>RF
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Fortran /-lW$.+{?
WRITE(*,10) hA/Es?U]
10 FORMAT('Hello, World!') +7WpJ;C4
STOP &-NGVPk81`
END ZI$P Qz2i
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qrOesSdc
HTML j3w~2q"r
<HTML> %<Qv?`B
<HEAD> &=%M("IlD
<TITLE> Hello World! </TITLE> wb#[&2i
</HEAD> tD}{/`{_t
<BODY> !Y UT*
<p>Hello World!</p> !T)_(}|6}
</BODY> A;ZluQ
</HTML> K(MZ!>{
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H v%`k*n':
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4s>L]!
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INTERCAL 1GR|$E
PLEASE DO ,1 <- #13 *pS3xit~
DO ,1 SUB #1 <- #238 %y>*9$<pXe
DO ,1 SUB #2 <- #112 'dQGb-<_<
DO ,1 SUB #3 <- #112 $i8oLSRV
DO ,1 SUB #4 <- #0 rjfWty%6pX
DO ,1 SUB #5 <- #64 mDwuJf8}
DO ,1 SUB #6 <- #238 8EiS\$O-
DO ,1 SUB #7 <- #26 P%[{ 'u
DO ,1 SUB #8 <- #248 BB1_EdoG
DO ,1 SUB #9 <- #168 2^5RQl/
DO ,1 SUB #10 <- #24 C)qG<PW.!
DO ,1 SUB #11 <- #16 Qd3ppJn
DO ,1 SUB #12 <- #158 ^N ;TCn
DO ,1 SUB #13 <- #52 th"Aatmp
PLEASE READ OUT ,1 ]B&jMj~y&
PLEASE GIVE UP A#pH$s
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Java g rQ,J
public class Hello Rdj3dg'<
{ J+Y?'"r
public static void main(String[] args) Bq4@I_b
{ .Q</0*sp
System.out.println("Hello, world!"); IA=\c
} ]U4C2}u
} Ttb ?x<)+8
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tnb'\}Vn
JSP E7SmiD@)
<% n*AN/LBp
out.print("Hello, world!"); N^[MeG,8
%> 5P);t9O6
Ho%%voJBS
@O6
2}F
MIXAL bWCtRli}
TERM EQU 19 the MIX console device number #'#@H
ORIG 1000 start address *gwo.s
START OUT MSG(TERM) output data at address MSG Xe
^NVF
HLT halt execution h^H)p`[Gme
MSG ALF "MIXAL" A}uWy^w
ALF " HELL" #x6wM~
ALF "O WOR" X*)DpbWd
ALF "LD " L`w_Q2{sv
END START end of the program [4])\q^q
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Nuva bI;u};v
<..直接输出..> XaU^^K
Hello, world! oC!z+<
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<..或者..> }&l%>P
Q`=d5Uvw
<. ?|hYtV
// 不带换行 [].euDrX
? "Hello, world!" RbA.&=3
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// 或者 (f"LD8MJ/
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// 带换行 JVx-4?
?? 'Hello, world!' (3m^@2i
.> JAmpU^(C
D|C!KF (
)h%tEY$AJ
OCaml Lp{uA4:=K
let main () = b u/GaE~
print_endline "Hello world!";; )Ee`11
=@;\9j
)RT:u)N
Pascal -{*QjP;K
program Hello; UQT=URS
begin 6I5LZ^/ G9
writeln('Hello, world!'); NdI~1kemr
end. ~MK%^5y?
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^
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Perl E@@XWU21;N
#!/usr/local/bin/perl S]c&