“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。 K;f'&9-+i,
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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》。 G5Ci"0
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以下是用不同语言写成的Hello World程序的几个例子: wYf=(w\c
Ada oPNYCE
with Ada.Text_Io; use Ada.Text_Io; y0qE::/H$
procedure Hello is vtFA#})~
begin oT5xe[{yj
Put_Line ("Hello, world!"); Ss u{Lj
end Hello; TKc&yAK
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汇编语言 !dLz ?0
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x86 CPU,DOS,TASM J1<fE(X
MODEL SMALL JXeqVKF
IDEAL YF{K9M!
STACK 100H e76@-fg
![5<\
DATASEG UBRMV
s
HW DB 'Hello, world!$' (Df<QC`0v
bq4H4?j
CODESEG 'w%N(N tq
MOV AX, @data JMOP/]%D
MOV DS, AX 7/vr!tbL`p
MOV DX, OFFSET HW P:k(=CzZ@J
MOV AH, 09H +&\TdvNI4
INT 21H ;_i0@@J
MOV AX, 4C00H Jb-wvNJu
INT 21H x=B+FIJ
END =] 5;=>(
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x86 CPU,GNU/Linux,NASM LbR/it'}
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). RQ,(?I*8\
;Enter this into "hello.asm" then type: >`NY[Mn
;"nasm -f elf hello.asm" b=T+#Jb
;"ld hello.o -o hello" VP 4t~$"
;"./hello" |->y'V
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section .data ;data section declaration &SN$D5U'
msg db 'Hello World!',0AH (P#2Am$
len equ $-msg ;string length o33{tUp'
+lha^){
section .text ;code section declaration GIVs)~/Eq
global _start ;entry point (start of execution) 8
(^2
_start: mov edx,len ;string length >KY\Bx
mov ecx,msg ;string start >q &ouVE
mov ebx,1 ;file handle: stdout *A\NjXJl~
mov eax,4 ;sys_write SA>;]6)`(
int 80h ;kernel system call .%wEuqW=0
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mov ebx,0 ;return value p>eD{#2
mov eax,1 ;sys_exit xYu~}kMu
int 80h ;kernel system call 6 qKIz{;
!v;r3*#Nky
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x86 CPU,Windows,MASM32 )N=b<%WD
.386 /1li^</|p`
.model flat,stdcall G0s:Dum
option casemap:none A}y1v;FB
;Include 文件定义 c0G/irK
include windows.inc deTbvl
include user32.inc RO.(k!J .
includelib user32.lib vWkKNB
include kernel32.inc "(efd~.]
includelib kernel32.lib x#8=drh.:C
;数据段 ,t+ATaOF
.data Ok`U*j
szCaption db 'A MessageBox!',0 )vU{JY;
szText db 'Hello,world!',0 Ic=V:
;代码段 H+5]3>O-$
.code aY:(0en]&
start: f,L
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK pn $50c
invoke ExitProcess,NULL J#x91Jh
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 'c$9[|x
end start ,;d9uG2
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BEGIN { print "Hello, world!" } fd,~Yj$R?
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BASIC ;W+-x]O
传统版BASIC(例如GWBASIC): Z],"<[E
_5m }g!
10 PRINT "Hello, world!" 8&UuwZ6i-
20 END <aHt6s'
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或在提示符输入: %|,<\~P
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?"Hello, world!":END Nz}Q"6L
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现代版BASIC(例如Quick BASIC): 4a @iR2e
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Print "Hello, world!" ppnj.tLz;r
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以下的语句在Quick BASIC中同样有效: 8_,ZJ9l;
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? "Hello,world!" }[DAk~
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A zle ;\l`
BCPL }1W$9\%
GET "LIBHDR" y*(YZ zF
]s -6GT
LET START () BE K`X2N
$( #`fT%'T!
WRITES ("Hello, world!*N") |@g1|OWd|
$) 5->PDp
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8g@^
Befunge d$TW](Bby
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Brainfuck S }n;..{
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< J9 =gv0
+++++++++++++++.>.+++.------.--------.>+.>. bvx:R ~E$
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C +n, BD C;
#include <stdio.h> w?tKL0c
o/zCXZnw#
int main(void) X2uX+}h*tA
{ 0l=}v%D
printf("Hello, world!\n"); EC~t'v
return 0; ;9PM?Iy[
} vRq xZN
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C++ 1;P\mff3Y
#include <iostream> eI}VH BAz
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int main() ]2(c$R
{ eFio,
std::cout << "Hello, world!" << std::endl; 4PWr;&
return 0; -"zu"H~t4
} 8[C6LG
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C++/CLI ~{+{p cO}
int main() upDQNG>d
{ u,m-6@il
System::Console::WriteLine("Hello, world!"); 1955(:I
} JLu0;XVK
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c Vn+~m_%
C# (C Sharp) >D/~|`=p
class HelloWorldApp 0'hx w3#
{ a+/|O*>#
public static void Main() >y9o&D