“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。 5<'n
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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》。 KIXwx98
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以下是用不同语言写成的Hello World程序的几个例子: }rFsU\]:q
Ada i{%z
with Ada.Text_Io; use Ada.Text_Io; HV#?6,U}
procedure Hello is O>)n*OsS
begin G2U5[\
Put_Line ("Hello, world!"); }I`
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end Hello; 5n&)q=jk=
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汇编语言 B}l}Aq8
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x86 CPU,DOS,TASM ]6?c8/M
MODEL SMALL [R@q]S/
IDEAL =woqHTR
STACK 100H (ffOu#RQ3
9RCB$Ka6X
DATASEG ~Q.8 U3"
HW DB 'Hello, world!$' /j=DC9_
a#OhWqu$
CODESEG 1I:"0("}
MOV AX, @data ZmYa.4'L
MOV DS, AX 4iL.4Uj{N
MOV DX, OFFSET HW KxgR5#:i"
MOV AH, 09H ~/]\iOL
INT 21H 6T}
CPDRq
MOV AX, 4C00H 9.MGH2^L?
INT 21H Up1$xLSl
END ,=q7}5o Y
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x86 CPU,GNU/Linux,NASM =/ !{<^0
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 5VoOJ_hq
;Enter this into "hello.asm" then type: SevfxR
;"nasm -f elf hello.asm" FrAqTz
;"ld hello.o -o hello" 9;xL!cy
;"./hello" .:|#9%5
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section .data ;data section declaration D>"{H7mY
msg db 'Hello World!',0AH Qw{\sCH>
len equ $-msg ;string length ~#N.!e4
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section .text ;code section declaration W?4&lC^G
global _start ;entry point (start of execution) V5(tf'
_start: mov edx,len ;string length 5~kW-x
mov ecx,msg ;string start 7E\K!v_
mov ebx,1 ;file handle: stdout jl 30\M7
mov eax,4 ;sys_write 5{!a+
int 80h ;kernel system call /pSUn"3
f)ucC$1=
mov ebx,0 ;return value ~(l2%(3G
mov eax,1 ;sys_exit Y9I #Q
int 80h ;kernel system call |({UV-`
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x86 CPU,Windows,MASM32 dl3LDB
.386 ^8f|clw"
.model flat,stdcall edImrm1f
option casemap:none ; ei<Q =[
;Include 文件定义 !lt\2Ae
include windows.inc NdXy%Q
include user32.inc j4
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includelib user32.lib c}I8!*\
include kernel32.inc @88z{
includelib kernel32.lib }77=<N br
;数据段 `pv89aO
.data kVG6\<c]
szCaption db 'A MessageBox!',0 9 FFfRIVY
szText db 'Hello,world!',0 8n. "5,P
;代码段 Ep,0Z*j
.code _sf0{/< )
start: 6{Cu~G{]N
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ,P; a/{U
invoke ExitProcess,NULL [/fwt!
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> HLyFyv\
end start u;'<- _
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AWK _QOOx+%*5
BEGIN { print "Hello, world!" } I vl^,{4
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BASIC ]cGz~TN~
传统版BASIC(例如GWBASIC): 2'UFHiK
n\8[G[M
10 PRINT "Hello, world!" n[cyK$"
20 END ^hYR5SX
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或在提示符输入: luxKgcU
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?"Hello, world!":END )(|0KarF
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现代版BASIC(例如Quick BASIC): @)juP- o%
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Print "Hello, world!" p TV@nP
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以下的语句在Quick BASIC中同样有效: glKs8^W
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? "Hello,world!" {'K;aJ'\
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BCPL Mpl,}Q!c
GET "LIBHDR" ]JCB^)tM
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LET START () BE E.Q}
\E
$( Z :i"|;
WRITES ("Hello, world!*N") (+Nmio
$) %_J/&{6G
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t=pkYq5t8
Befunge '/qe#S
"!dlrow olleH">v ]!Aze^7;
, 6x3Ew2
^_@ -Fw4;&>
fz?Wr: I
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Brainfuck ;KZ2L~
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< <~8f0+"
+++++++++++++++.>.+++.------.--------.>+.>. $O</akn;
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#include <stdio.h> s8I77._s
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int main(void) UmI@":|-
{ 96V, [-arf
printf("Hello, world!\n"); +7vh_ _
return 0; }lvP|6Y: y
} = {DB
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C++ u'n%BVt
#include <iostream> xXh]z|
Bma|!p{
int main() 4hr+GO@o(
{ B>nd9Z '
std::cout << "Hello, world!" << std::endl; l aL4ez
return 0; :Y?08/V
} 1bAp{u&
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C++/CLI 3eDx@8N
}
int main() ?*5l}y=
{ ~hw4gdtS
System::Console::WriteLine("Hello, world!"); 4a-F4j'
} e5\1k#@
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C# (C Sharp) rW>'2m6HU
class HelloWorldApp 2{tJ'3
{ ~#x!N=q
public static void Main() dz.MH
{ >t<R6f_Q0
System.Console.WriteLine("Hello, world!"); qpH-P8V
} aj-uk(r
} H.S|njn:r
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COBOL 30v1VLR_)
IDENTIFICATION DIVISION. 3~09)0"!d
PROGRAM-ID. HELLO-WORLD. lxJ.h&