“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。 g/eE^o~;
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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》。 nPE{Gp) }
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以下是用不同语言写成的Hello World程序的几个例子: V3
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Ada 12.|E d*72
with Ada.Text_Io; use Ada.Text_Io; U`z=!KI+g
procedure Hello is n&Bgpt~
begin /C}u,dBf
Put_Line ("Hello, world!"); BKi@c\Wb
end Hello; eot%Th?[
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汇编语言 EJrP{GH
iU+O(vi
x86 CPU,DOS,TASM xQ%N%
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MODEL SMALL =A{F&:+a]
IDEAL )vn{?Ulj
STACK 100H ;ry~x:7L7
EN^5Hppb
DATASEG JD9)Qelw^$
HW DB 'Hello, world!$' Phr+L9Eog
Cs))9'cD]
CODESEG c~SR@ZU
MOV AX, @data KSz;D+L\
MOV DS, AX K|]/BjB/
MOV DX, OFFSET HW s+DOr$\
MOV AH, 09H 508v:?^'
INT 21H <- L}N '
MOV AX, 4C00H ~wvu7
INT 21H 6/6M.p
END g%TOYZr!X
BlnR{Y
{u~JR(C:
x86 CPU,GNU/Linux,NASM ]lqLC
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 9(6f:D
;Enter this into "hello.asm" then type: 3N257]
;"nasm -f elf hello.asm" Lcb5^e?'Q
;"ld hello.o -o hello" Y7BmW+
;"./hello" gamE^Ee
TophV}@B`
section .data ;data section declaration >cJix
1
msg db 'Hello World!',0AH 0fu*}v"
len equ $-msg ;string length 8
kvF~d
;
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section .text ;code section declaration \(_(pcl
global _start ;entry point (start of execution) /*P) C'_M
_start: mov edx,len ;string length $O3.ex V
mov ecx,msg ;string start gWQ(B
mov ebx,1 ;file handle: stdout Q<0X80w>
mov eax,4 ;sys_write >
9.%hSy
int 80h ;kernel system call V_zU?}lZ^
V/`vX;%
mov ebx,0 ;return value jh(T?t$&
mov eax,1 ;sys_exit jI Entk
int 80h ;kernel system call 7>"dc+Fg
/g$G
G9
L>L IN 1A
x86 CPU,Windows,MASM32 U$|q]N
.386 e.\dqt~%y
.model flat,stdcall <p/zm}?')
option casemap:none DG?g~{Y~b
;Include 文件定义 t'1g+g
include windows.inc bFjH*~
P
include user32.inc ,BUrZA2\U$
includelib user32.lib ulE5lG0c
include kernel32.inc 90#* el
includelib kernel32.lib 4O<sE@X
;数据段 R:4@a ':H
.data ]"}BqS0
szCaption db 'A MessageBox!',0 hjyM xg;Q?
szText db 'Hello,world!',0 By waD?
;代码段 %_."JT$v{
.code k3K*{"z
start: q
#mBNe62p
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK =p^$>o
invoke ExitProcess,NULL 1w~PHH`~
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ?Z2`8]-E
end start Unvl~lm6
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AWK +5S>"KAUt0
BEGIN { print "Hello, world!" } @^T~W^+
p#).;\M
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BASIC >"8;8Ev
传统版BASIC(例如GWBASIC): >$7x]f
hr;^.a^
10 PRINT "Hello, world!" ;plBo%EBV
20 END ![;={d0
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或在提示符输入: 9}%$j
( +Sv3h
?"Hello, world!":END oUwo!n}
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现代版BASIC(例如Quick BASIC): fX]`vjM{
r1}^\C
Print "Hello, world!" "MU-&**
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以下的语句在Quick BASIC中同样有效: +: x[cK
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? "Hello,world!" [0EWIdT*b
=* G3Khz!
-nXP<v=V
BCPL k:I,$"y4
GET "LIBHDR" OHi.5 (
tPl 4'tW_
LET START () BE w]t'2p-'
$( pJx7S sW
WRITES ("Hello, world!*N") 2HtsSS#0Q
$) u"q56}Q?]
vP x/&x
~v%6*9
Befunge ?V,q&=9
"!dlrow olleH">v K fD.J)
, Ly&+m+Gwu
^_@ ?<${?L>
)i}j\";>L
OL>)SJj5
Brainfuck Qn7T{ BW
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< '{cSWa|
#
+++++++++++++++.>.+++.------.--------.>+.>. Rjq Xz6
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yI 2UmhA
C 3l%Qd<
#include <stdio.h> 5afD;0D5TI
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int main(void) (/uAn2
{ 7b+r LyS0
printf("Hello, world!\n"); h <e
return 0; k?Z:=.YW
} K_;vqi^1^&
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H0;Iv#S!
C++ 7Y9#y{v1
#include <iostream> Ww,\s5Uw
}9+;-*m/
int main() uR ?W|a
{ j@>D]j
std::cout << "Hello, world!" << std::endl; q0NFz mG
return 0; W}f)VC;D
} nd]SI;<
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C++/CLI F%h3?"s
int main() 8@;]@c)m
{ zMR)w77
System::Console::WriteLine("Hello, world!"); q2*A'C
} A#.
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eAf i!!Z<
C# (C Sharp) |tGUx*NN
class HelloWorldApp 6N#hN)/
{ U?#wWbE1
public static void Main() P9/ (f$ =
{ ^ +SE_ -+]
System.Console.WriteLine("Hello, world!"); /?eVWCR
} !?nbB2,
} hyH[`wiq
5p (zhfuG
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COBOL V4+|D2
IDENTIFICATION DIVISION. 23wztEp{a
PROGRAM-ID. HELLO-WORLD. j(=w4Sd_W
hm,{C
ENVIRONMENT DIVISION. (-gomn
h^SWb91"G
DATA DIVISION. `gX|q3K\s
D5,]E`jwu
PROCEDURE DIVISION. oZa'cZNs
DISPLAY "Hello, world!". 'OsZD?W{
STOP RUN. 8M99cx*K
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4.!1odKp
Common Lisp } ?j5V
(format t "Hello world!~%") @@AL@.*
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DOS批处理 &BRk<iwV
@echo off ;Z]Wj9iY
echo "Hello, world!" ij
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'XK 'T\m
g&s.
0+
Eiffel N1$u@P{
class HELLO_WORLD ,^:{!?v
n93q8U6m/U
creation d=D-s
make k,:W]KD
feature =Kd'(ct
make is +<a\0FsD
local jE*{^+n
io:BASIC_IO 7*l$i/!
do z`zz8hK.
!!io geme_
io.put_string("%N Hello, world!") eFG/!b<17
end -- make 3`bQ0-D;
end -- class HELLO_WORLD ;P91'B~t
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6KMO*v
Erlang ,<v0(
-module(hello). wZ(1\
M(
-export([hello_world/0]). fz(YP=@ZnP
#EH=tJgO|J
hello_world() -> io:fwrite("Hello, World!\n"). BU:;;iV8
=W~7fs
ON,[!pc
Forth i#'K7XM2
." Hello, world!" CR MgeC-XQM
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