“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。 x.ba|:5
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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》。 ^CUSlnB\(
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以下是用不同语言写成的Hello World程序的几个例子: E30Ln_^o
Ada d ,UCH
with Ada.Text_Io; use Ada.Text_Io; NddO*`8+)
procedure Hello is ^}J<)}Q
begin sZKEUSFD #
Put_Line ("Hello, world!"); "e@n:N!
end Hello; %yfE7UPS]
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汇编语言 5Dd:r{{ Q
44~hw:
x86 CPU,DOS,TASM zZ:xEc
MODEL SMALL U9
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IDEAL 33 :@*
STACK 100H yplG18
p-xd k|'[
DATASEG D^|9/qm$
HW DB 'Hello, world!$' K3L"^a
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CODESEG gGEIK0\{
MOV AX, @data 4@h;5
MOV DS, AX Kk=LXmL2
MOV DX, OFFSET HW %&h c"7/k
MOV AH, 09H J#''q"rZ
INT 21H W&YU^&`Yr
MOV AX, 4C00H _lX8K:C(
INT 21H V#L'7">VP
END nM8[
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x86 CPU,GNU/Linux,NASM U7h(-dV
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ?`H[u7*%
;Enter this into "hello.asm" then type: P#MK
;"nasm -f elf hello.asm" et` 0Je
;"ld hello.o -o hello" QD$Gw-U-l=
;"./hello" FAw1o
<: :VCA %
section .data ;data section declaration $Asr`Q1i
msg db 'Hello World!',0AH g5Hr7Km
len equ $-msg ;string length *C7F2o
R5(F)abi
section .text ;code section declaration '#q4Bc1
global _start ;entry point (start of execution) bY)#v?
_start: mov edx,len ;string length 45<y{8
mov ecx,msg ;string start
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mov ebx,1 ;file handle: stdout Ys3uPs
mov eax,4 ;sys_write 35_)3R)
int 80h ;kernel system call e>AXXUEf
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mov ebx,0 ;return value @^&7$#jq%
mov eax,1 ;sys_exit yQ%"U^.m
int 80h ;kernel system call nxfoWy
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x86 CPU,Windows,MASM32 _{)9b24(
.386 s$ z2 c
.model flat,stdcall N 9LgU)-Jt
option casemap:none u okc:D
;Include 文件定义 /8c&Axuv
include windows.inc -{{[cTI
include user32.inc X#`dWNrN
includelib user32.lib 0%#\w*X8
include kernel32.inc G\kpUdj}
includelib kernel32.lib J+ts
;数据段 TH:W#Ot
.data 59lj7
szCaption db 'A MessageBox!',0 2w?hgNz
szText db 'Hello,world!',0 vy9dAl
;代码段 ]iVLHVqz
.code IPtvuEju\
start: q.W>4 k
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK p$XKlg&
invoke ExitProcess,NULL ?lKhzH.T
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> i\Wdo/c-H
end start %\6Q .V#s
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AWK x-;`-Uo%
BEGIN { print "Hello, world!" } t)a;/scT
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BASIC Zh'&-c_J
传统版BASIC(例如GWBASIC): izuF !9
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10 PRINT "Hello, world!" Ch5+N6c^
20 END :NE/Ddgc'
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或在提示符输入: x?sI;kUw8
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?"Hello, world!":END J=H)JH3
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现代版BASIC(例如Quick BASIC): k\aK?(.RC7
ahGT4d`)9
Print "Hello, world!" Ia4)uV8
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以下的语句在Quick BASIC中同样有效: @D[`Oj)
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? "Hello,world!" /.Q4~Hw%}
eR;!(Oy=A
DQ80B)<O
BCPL N+g@8Q2s;5
GET "LIBHDR" ~ap2m
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LET START () BE
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$( ."6[:MF
WRITES ("Hello, world!*N") lr3mE
$) E=w3=\JP
nc?B6IV
lm0N5(XP
Befunge c$h9/H=~
"!dlrow olleH">v h"W8N+e\
, 5zB~4 u
^_@ -t-tn22
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Brainfuck fZ{[]dn[
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< |FNCXlgZ
+++++++++++++++.>.+++.------.--------.>+.>. `JURQ:l)3^
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r{K;|'d%h
C {C3Y7<
#include <stdio.h> 7~UR!T9
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int main(void) eV};9VJ$F
{ {hdPhL
printf("Hello, world!\n"); ~Xv=9@,h
return 0; `dW]4>`O
} w0J|u'H
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C++ K=\O5#F?3
#include <iostream> j*R,m1e8
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int main() [V}, tO|
{ )!W45"l-3M
std::cout << "Hello, world!" << std::endl; CIC[1,
return 0; l67Jl"v
} diT=x52
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C++/CLI =|U@
int main() TzG]WsY_
{ LKF/u` 0dP
System::Console::WriteLine("Hello, world!"); ^J/)6/TMXm
} k$i'v:c|:i
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md Gwh7/3
C# (C Sharp) 04@cLDX8uB
class HelloWorldApp RHY4P4B<v>
{ 9
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public static void Main() EL{vFP
{ nt
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System.Console.WriteLine("Hello, world!");
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} F-gE<<
} 9S7A!AKE
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COBOL E-2eOT
IDENTIFICATION DIVISION. 7jG(<!,
PROGRAM-ID. HELLO-WORLD. }IaA7f
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ENVIRONMENT DIVISION. LHYLC>J
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DATA DIVISION. nv/[I,nw
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PROCEDURE DIVISION. t?eH'*>
DISPLAY "Hello, world!". @%ECj)u`O
STOP RUN. 83Ou9E!W
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Common Lisp K7)kS
(format t "Hello world!~%") !36]ud&
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DOS批处理 R^&q-M=O[
@echo off z8_XX$Mnt
echo "Hello, world!" KOSM]c\H
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Eiffel 0y#Ih {L
class HELLO_WORLD nHXX\i
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creation mI1H!
make 45 >XKr.%
feature chI.{Rj
make is :$r ^_
local YA]5~ZE\
io:BASIC_IO 2f:^S/.A
do evuZY X@
!!io $)~
io.put_string("%N Hello, world!") ef"?|sn
end -- make I/J7rkf
end -- class HELLO_WORLD sy5 Fn~\R
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~l E _L1-c
Erlang z? ]G3$i(
-module(hello). VR?^HA9
-export([hello_world/0]). 19e8
#s5N[uK^m
hello_world() -> io:fwrite("Hello, World!\n"). 6sfwlT
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Forth va)%et0!
." Hello, world!" CR Q;/a F`
L V{Q,DrP
\3YO<E!t
Fortran (g!p>m!Z
WRITE(*,10) UK[v6".^h
10 FORMAT('Hello, World!') ts~{w;c
STOP [1G^/K"
END
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