“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。 lEYAq'=
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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》。 xXRlQ|84
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以下是用不同语言写成的Hello World程序的几个例子: u)4eu,MBT
Ada mm:g9j
with Ada.Text_Io; use Ada.Text_Io; ;ztt*py
procedure Hello is (M-Wea!q
begin ln2lFfz
Put_Line ("Hello, world!"); %K[u
end Hello; W7` fI*lc
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s# 9*`K
汇编语言 aGml!N5'
Pm/Rc
x86 CPU,DOS,TASM ,+>JQ82
MODEL SMALL PC<[$~
IDEAL s L=}d[
STACK 100H 6Bf aB:
mUdj2vB$+'
DATASEG *DcB?8%
HW DB 'Hello, world!$' 'JRYf;9c
Fd;%wWY.zm
CODESEG ]ft}fU5C1
MOV AX, @data _*.ImD
MOV DS, AX h0aK}`/a
MOV DX, OFFSET HW 0}3Xry,{
MOV AH, 09H VK>Cf>
INT 21H eUVhNg
MOV AX, 4C00H 63fgl+
INT 21H $.F.xYS9IJ
END -(lCM/h
g2%fla7r
KL\hV .6
x86 CPU,GNU/Linux,NASM d` X1cG
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). $4:Se#nl
;Enter this into "hello.asm" then type: He)!Ez\X
;"nasm -f elf hello.asm" _Q9I
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;"ld hello.o -o hello" z=6zc-$y 9
;"./hello" .z, ot|
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section .data ;data section declaration H(gETRh
msg db 'Hello World!',0AH 045_0+r"@
len equ $-msg ;string length `LOW)|6r`
sXwa`_{
section .text ;code section declaration F#)@ c
global _start ;entry point (start of execution) '\% Kd+k
_start: mov edx,len ;string length E}g)q;0v|2
mov ecx,msg ;string start Q;?rqi
,
mov ebx,1 ;file handle: stdout y#{v\h
Cz
mov eax,4 ;sys_write _KJ!C!
int 80h ;kernel system call `kYcTFk
s3[\&zt
mov ebx,0 ;return value se@?:n1)
mov eax,1 ;sys_exit &7r73~TXm
int 80h ;kernel system call U[{vA6
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hEq-)-^G
x86 CPU,Windows,MASM32 yHf:/8Z
.386 ~0Z.,p_
.model flat,stdcall KA? J:
option casemap:none FEA t6
;Include 文件定义 %j/}e>$"Nk
include windows.inc lSG]{
include user32.inc \IP
9EF A
includelib user32.lib PY
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include kernel32.inc ;~GBD]
includelib kernel32.lib 1<;VD0XX
;数据段 slQEAqG)B
.data !LJ4
S
szCaption db 'A MessageBox!',0 -sxu7I
szText db 'Hello,world!',0 ^Rb*mI
;代码段 8l*h\p:Q
.code FGzn|I
start: X@ S~D7|ja
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK q.bxnta"
invoke ExitProcess,NULL $kBcnk
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> <~zPt&C]V
end start :n,x?bM
.dsB\C
v Q51-.g
AWK BB imP
BEGIN { print "Hello, world!" } /s@j{*Om
s+E:
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BASIC ?&-$Zog
传统版BASIC(例如GWBASIC): LSrKi$
{ u3giB
10 PRINT "Hello, world!" eig{~3
20 END G_`Ae%'h
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或在提示符输入: _+OCI%=:
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?"Hello, world!":END E:y^= Y
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现代版BASIC(例如Quick BASIC): LKBh{X0%(
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Print "Hello, world!" XXA.wPD-
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以下的语句在Quick BASIC中同样有效: I)MRAo
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? "Hello,world!" %c@PTpAM
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BCPL M'VJE|+t
GET "LIBHDR" _UV_n!R
O1!YHo
LET START () BE mD%IHzbn
H
$( [Z^26/5a
WRITES ("Hello, world!*N") 7Vuf4Z5
$) nrR2U`
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Befunge yL %88,/
"!dlrow olleH">v 49ehj1Se
, WmkCV+thA
^_@ }tL]EW^
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Brainfuck U6.hH%\}@
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< v'm-A d+4t
+++++++++++++++.>.+++.------.--------.>+.>. yxi&80$
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xXfv({
C k2(k0HFR
#include <stdio.h> h.wffk,
'e_e*.z3
int main(void) g_JQW(_
{ gvr&7=p
printf("Hello, world!\n"); !>f:wk2
return 0; ~14|y|\/
} <"8F=3:uk
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C++ cl`7|;v|?
#include <iostream> i-?mghe8
{<1uV']x
int main() 4 !m'9
{ ?*.:*A
std::cout << "Hello, world!" << std::endl; $y{.fj y3
return 0; Q5A,9ovNZ
} JXHf$k
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BF 0#G2`h>
C++/CLI `KZu/r-M9
int main() K'B*D*w
{ _GM?`
System::Console::WriteLine("Hello, world!"); >
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} ttls.~DG
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C# (C Sharp) L9oLdWa(C
class HelloWorldApp %`~+^{Wp
{ x4h.WDT$
public static void Main() Gqj(2.AY
{ 4 Dy1M}7
System.Console.WriteLine("Hello, world!"); @R<z=n"
} W.%p{wB|
} 8llXpe
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XpYd|BvW
COBOL X(BX+)YR
IDENTIFICATION DIVISION. M!i*DU+SE
PROGRAM-ID. HELLO-WORLD. *sau['Ha
RF;[:[*W
ENVIRONMENT DIVISION. WX]O1Y
~0[(-4MA
DATA DIVISION. 0$0
215
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PROCEDURE DIVISION. p]<)6sZ
DISPLAY "Hello, world!". T]/5aA4
STOP RUN. VLVDi>0i
JLz32 %-M
a:OM I
Common Lisp n^b CrvD
(format t "Hello world!~%") \RtFF
V(:wYk?ZR
22;B:
DOS批处理 +o'xyR'(
@echo off fwmXIpteK
echo "Hello, world!" :pNS$g[
.R#-u/6g(
U#bmMH
Eiffel Ya>AI.!K
class HELLO_WORLD [qxU
\OSC
Vf.*!`UH
creation \B:k|Pw6~
make We\i0zUU
feature s: iBl/N}
make is c`&g.s@N\
local R4T@ ]l&W
io:BASIC_IO bg/=P>2
do Z9MR"!0
!!io O} (sn
io.put_string("%N Hello, world!") {p$@)b
end -- make `'*4B_.
end -- class HELLO_WORLD
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J}+N\V~
Erlang ;(jL`L F
-module(hello). }K`KoM
-export([hello_world/0]). j8
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UbGnU_}
hello_world() -> io:fwrite("Hello, World!\n"). }_F:]lI*R
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