“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。 8;d:-Cp
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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》。 NTdixfR
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以下是用不同语言写成的Hello World程序的几个例子: #^`4DhQ/
1
Ada )<oJnxe]
with Ada.Text_Io; use Ada.Text_Io; (X $=Q6
procedure Hello is <L mIK
begin G<At_YS
Put_Line ("Hello, world!"); *S]Ci\{_
end Hello; VvvRRP^q
Hc!
mB
na#CpS;pc
汇编语言 ]p _L)
2"0es40;0
x86 CPU,DOS,TASM LM$W*
MODEL SMALL aO]ZZleNS
IDEAL x^HGVWw_
STACK 100H O,J>/
w&$`cD
DATASEG )LdP5z-
HW DB 'Hello, world!$' xe#FUS
3
iWRH{mK
CODESEG *?Lv3}E
MOV AX, @data ~?D4[D|sB
MOV DS, AX W}--p fG
MOV DX, OFFSET HW |2?'9<
MOV AH, 09H ^M3~^lV
INT 21H ZO!I.
MOV AX, 4C00H o]+z)5zC
INT 21H |
h`0u'#
END 8I-u2Y$Sr
u}>#Eb
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x86 CPU,GNU/Linux,NASM Fgk ajig
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). m`IC6*
;Enter this into "hello.asm" then type:
*-+&[P]m
;"nasm -f elf hello.asm" ~res V
;"ld hello.o -o hello" @x9a?L.48
;"./hello" c;%_EN%
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section .data ;data section declaration {s)+R[?m<o
msg db 'Hello World!',0AH sSOOXdnGG
len equ $-msg ;string length stG~AC
Jpj}@,
section .text ;code section declaration @En^wN
global _start ;entry point (start of execution) $.C=H[QC
_start: mov edx,len ;string length M^MdRu
mov ecx,msg ;string start vbkI^+=,YY
mov ebx,1 ;file handle: stdout w<C#Bka
mov eax,4 ;sys_write QZ4v/Ou
int 80h ;kernel system call _6_IP0;
wQv'8A_}
mov ebx,0 ;return value DamCF
mov eax,1 ;sys_exit So{x]x:f
int 80h ;kernel system call 6S\C}U/
+)k b(
rJPb 3F
x86 CPU,Windows,MASM32 P6E3-?4j
.386 ,O.3&Nz,c
.model flat,stdcall m/v9!'cMI
option casemap:none UV5Ie!\nm
;Include 文件定义 hD\rtW
include windows.inc `o<'
x.I
include user32.inc 0="%Y^N
includelib user32.lib Ol1e/Wv
include kernel32.inc kV?y0J.
includelib kernel32.lib c05TsMF&O
;数据段 Z= jr-)kK
.data >^%7@i:@U
szCaption db 'A MessageBox!',0 ^9^WuSq
szText db 'Hello,world!',0 n_$
:7J
;代码段 -9"['-WH,
.code AP[|Ta
start: F_Z- 8>P
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK OTC!wI
g
invoke ExitProcess,NULL 6WV\}d:
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Uh7v@YMC
end start RMX:9aQ3F
}MRd@ 0-?!
$P>`m$(8
AWK /<E5"Mm%
BEGIN { print "Hello, world!" } Xg<*@4RD8
j]*j}%hz
%{YN70/
BASIC KiI!frm1
传统版BASIC(例如GWBASIC): m0LTx\w!
Z^V6K3GSz-
10 PRINT "Hello, world!" SfgU`eF%B
20 END ^[]}R:
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或在提示符输入: VS9`{
g) p,5BADm
?"Hello, world!":END qP{/[uj[K
Y3r%B9~
现代版BASIC(例如Quick BASIC): %FXfqF9
ZX5 xF<os8
Print "Hello, world!" 8CnRi
8#(Q_
以下的语句在Quick BASIC中同样有效: qY~`8
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? "Hello,world!" BDVHol*g
oo.! .Kv
:>D[n1v
BCPL Vnx,5E&
GET "LIBHDR" t<~ $
=i_-F$pV
LET START () BE GytXFL3`:
$( N` aF{3[
WRITES ("Hello, world!*N") ox:[f9.5
$) M@4UGM`J
T%6&PrQ7
Lg~B'd8m
Befunge Sp7ld7c
"!dlrow olleH">v `!Ds6
, !PrwH;
^_@ $ "E).j
w;k):;$
xEf'Bmebk
Brainfuck dFH$l
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< `)GrwfC
+++++++++++++++.>.+++.------.--------.>+.>. Cl^\OZN\=
vhsk0$f
H2
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C 3l3+A+n
#include <stdio.h> `}BF${vF
7<%<Ff@^)O
int main(void) -8r
{ =+-Yxh|*
printf("Hello, world!\n"); krsYog(^z
return 0; Hir Fl
} AtF3%Zv2
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Mk=mT3=#
C++ OiE;B
#include <iostream> yY[<0|o u
'XzXZJ[uq
int main() H^.IY_I`U*
{ 4hAl-8~Q6
std::cout << "Hello, world!" << std::endl; %F:)5gT?
return 0; &^}6
9
} .&9 i
U$
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:WSDf VX
C++/CLI L0&RvI#
int main() Y`o+XimX
{ /9zE^YcT
System::Console::WriteLine("Hello, world!"); ep=qf/vd<
} C4hx@abA
J|X
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c>/.
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C# (C Sharp) X=Ys<TM,
class HelloWorldApp vfl5Mx4
{ H"C[&r
public static void Main() $KLD2BAL
{ yv\#8I:qh
System.Console.WriteLine("Hello, world!"); ~BDu$
} HAv{R!*
} $Bj;D=d@V
@BrMl%gV
*;m5'}jsy
COBOL .Wq@gV
IDENTIFICATION DIVISION. 4'6`Ll|iq
PROGRAM-ID. HELLO-WORLD. ,_X/Gb6)
5*E#*H
ENVIRONMENT DIVISION. \EKU*5\Hp>
hSK;V<$[Z
DATA DIVISION. @FC"nM
m!W3Cwz\&
PROCEDURE DIVISION. YKbaf(K)9
DISPLAY "Hello, world!". <)\y#N
STOP RUN. cZ(elZ0~
?[&2o|
V\})3i8
Common Lisp _=q!
BW
(format t "Hello world!~%") iSFuT7;%
K]U;?h&CZc
xS7$%w['
DOS批处理 N<QjdD&
@echo off pSm $FBW h
echo "Hello, world!" 01T`Flz
)@~J
U,+[5sbo
Eiffel TLd `1Ac
class HELLO_WORLD RN)dS>$
=1P6Vk
creation (ewe"N+
make T]j.=|,d
feature dJv!Dts')C
make is 3H'*?|Y(#
local gb_X?j%p7
io:BASIC_IO 1ZNNsB
do X%`KYo%
!!io 3ZN>9`
io.put_string("%N Hello, world!") sRi %1r7
end -- make {G.jB/
end -- class HELLO_WORLD QK7e|M
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