“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。 o59b#9
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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: K&eT*JW>
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with Ada.Text_Io; use Ada.Text_Io; k-^le|n9
procedure Hello is 2T(7V[C%9
begin fbD,\ rjT
Put_Line ("Hello, world!"); cQ
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end Hello; G.`},c;A-
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汇编语言 B<i(Y1n[
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x86 CPU,DOS,TASM ,3N>`]Km'
MODEL SMALL -E~r?\;X
IDEAL L9-Jwy2(>
STACK 100H 4:-x!lt
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DATASEG /l_u $"
HW DB 'Hello, world!$' `jSe gG'
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CODESEG I]hjv
MOV AX, @data V~p01f"J
MOV DS, AX sO}CXItC+j
MOV DX, OFFSET HW KA{&NFx
MOV AH, 09H i&?\Pp;5-j
INT 21H c g)>A
MOV AX, 4C00H 9p{n7.
INT 21H QO^V@"N
END lX.-qCV"B
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x86 CPU,GNU/Linux,NASM (T%?@'\
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ,H%[R+)
;Enter this into "hello.asm" then type: {2YqEX-I*
;"nasm -f elf hello.asm" %}e['d h
;"ld hello.o -o hello" }0tHzw=#%e
;"./hello" 4.^T~n G
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section .data ;data section declaration *CPp U|
msg db 'Hello World!',0AH TW!OE"B
len equ $-msg ;string length tGU~G&
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section .text ;code section declaration Np%Q-T\
global _start ;entry point (start of execution) K_~kL0=4
_start: mov edx,len ;string length a"Xh
mov ecx,msg ;string start r-go921
mov ebx,1 ;file handle: stdout CAC%lp
mov eax,4 ;sys_write 1DcX$b
int 80h ;kernel system call g?Tev^D
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mov ebx,0 ;return value 0KTO)K
mov eax,1 ;sys_exit j#~~_VA~
int 80h ;kernel system call /Ry%K4$
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x86 CPU,Windows,MASM32 kDDC@A $
.386 \Oq8kJ=
.model flat,stdcall #4./>}G
option casemap:none ,
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;Include 文件定义 c?e-2Dp(
include windows.inc x"g)pGsT
include user32.inc S3l^h4
includelib user32.lib wU>Fz*
include kernel32.inc #:+F
includelib kernel32.lib 1Y*k"[?dW
;数据段 8lzoiA_9
.data Le:C8^
szCaption db 'A MessageBox!',0 [^s;Ggi9
szText db 'Hello,world!',0 dW%t ph
;代码段 G;flj}z
.code q&J5(9]O|L
start: $y&W:
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK D =mmBo
invoke ExitProcess,NULL pZ}B/j
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end start i@.Tv.NZ
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BEGIN { print "Hello, world!" } =PciLh
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BASIC icIn>i<m
传统版BASIC(例如GWBASIC): Zp3-Yo w2
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10 PRINT "Hello, world!" {0w2K82
20 END f)j*P<V
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或在提示符输入: g(9* !g
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?"Hello, world!":END ~abyjM
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现代版BASIC(例如Quick BASIC): X=KW
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Print "Hello, world!" [#mkTY
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以下的语句在Quick BASIC中同样有效: 'E9{qPLk(
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? "Hello,world!" wpuK?fP
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GET "LIBHDR" hdCd:6
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LET START () BE j
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WRITES ("Hello, world!*N") 4qp|g'uXT
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Befunge +1YEOOfVY
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#include <stdio.h> &{.IUg
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int main(void) G|f9l?p
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printf("Hello, world!\n"); =yZq]g6Q
return 0; 3\@2!:>
} 88v8lt;R
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C++ (cOe*>L;
#include <iostream> |Q3d7y
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int main() zp;!HP;/=
{ 1*u]v{JJ(
std::cout << "Hello, world!" << std::endl; >-I <`y-H
return 0; 4T(d9y
} O*l,&5
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C++/CLI GNMOHqg4
int main() XQ}J4J~Vm
{ rgzra"u)
System::Console::WriteLine("Hello, world!"); /S]RP>cQ
} ;7z6B|8
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C# (C Sharp) ]6^<VC`5D
class HelloWorldApp {IJ;)<>&VE
{ "u7[[.P)
public static void Main() \,G9'c 'u
{ 1 ;$XX#7o
System.Console.WriteLine("Hello, world!"); hJ{u!:4
} N9_* {HOy
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COBOL vd[7Pxe
IDENTIFICATION DIVISION. Sc[#]2 }
PROGRAM-ID. HELLO-WORLD. q k^FyZ<
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ENVIRONMENT DIVISION. |ZH(Z}m
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DATA DIVISION. A+RW=|:
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PROCEDURE DIVISION. h5'hP>b#
DISPLAY "Hello, world!". ^1.*NG8
STOP RUN. ?"9h-g3`x}
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Common Lisp Dm)B? H"
(format t "Hello world!~%") C12UZE;
ae sk.
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DOS批处理 G^W0!u,@
@echo off 89LD:+p/
echo "Hello, world!" X!Z)V)@J8
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Eiffel r&
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class HELLO_WORLD G(a5@9F
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creation [j0[c9.p[
make |MZ1j(_
feature T ?[28|
make is "sN%S's
local }N[X<9^Z
io:BASIC_IO bXnUz?1!d
do Z&n[6aV'F
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io.put_string("%N Hello, world!") ki'$P.v{$w
end -- make Xk4wU$1F
end -- class HELLO_WORLD l)[|wPf
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Erlang UN.;w3`Oc
-module(hello). ur}'Y^0iR
-export([hello_world/0]).
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hello_world() -> io:fwrite("Hello, World!\n"). ,>-D xS
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Forth X,v.1#[
." Hello, world!" CR U.<j2Kum
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Fortran ZW [&7[4
WRITE(*,10) &THtQ1D
10 FORMAT('Hello, World!') .#QE*<T)]
STOP <YU?1y?V
END ^L2d%d\5
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HTML ?wB_fDb}
<HTML> ~b~Tq
<HEAD> ;_bRq:!j;
<TITLE> Hello World! </TITLE> Uqel
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</HEAD> WoZU} T-
<BODY> ;W?#l$R
<p>Hello World!</p> j?N<40z
</BODY> Mr)t>4
</HTML> f7_(C0d
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PLEASE DO ,1 <- #13
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DO ,1 SUB #1 <- #238 @Y/&qpo$#W
DO ,1 SUB #2 <- #112 2#.s{ Bv
DO ,1 SUB #3 <- #112 /yG7!k]Eg
DO ,1 SUB #4 <- #0 12Oa_6<\0;
DO ,1 SUB #5 <- #64 inGUN??
DO ,1 SUB #6 <- #238 .}\8Y=
DO ,1 SUB #7 <- #26 f`hZb
DO ,1 SUB #8 <- #248 =VD],R)
DO ,1 SUB #9 <- #168 6'^E
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DO ,1 SUB #10 <- #24 ;TJpD0
DO ,1 SUB #11 <- #16 L(;$(k-/(
DO ,1 SUB #12 <- #158 O{l4 f:51
DO ,1 SUB #13 <- #52 ,->K)Rs ;
PLEASE READ OUT ,1 So&gDR;b
PLEASE GIVE UP /"Vd( K2Z
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Java b-<0\@`Z#
public class Hello v?VDASR2`
{ %'iJVFF
public static void main(String[] args) 1#=9DD$4
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System.out.println("Hello, world!"); 'OA*aQ=K
} X}Oe 'y
} B.; qvuM~
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out.print("Hello, world!"); +Hu\b&