“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。 ES:!Vx9t0|
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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》。 ? S=W&
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以下是用不同语言写成的Hello World程序的几个例子: i&+w _hD
Ada >N`6;gn*l
with Ada.Text_Io; use Ada.Text_Io; _94s(~g:
procedure Hello is IvBGpT"(I
begin *8g<R
Put_Line ("Hello, world!"); h!]"R<QQdu
end Hello; X.|Ygx
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0^ !Gib
汇编语言 hY\{|
p_terD:
x86 CPU,DOS,TASM dXu {p
MODEL SMALL CVKnTEs
IDEAL l`n5~Fs
STACK 100H a,Kky^B
j=sBq.S
DATASEG )GB`*M[
HW DB 'Hello, world!$' 1IA5.@G:
&,W$-[
CODESEG (7q^FtjA#
MOV AX, @data ,I*X)(
MOV DS, AX m^Lj+=Z"
MOV DX, OFFSET HW 6517Km 4-
MOV AH, 09H M[Y4_$k<-
INT 21H <4?*$
MOV AX, 4C00H } ~enEZ
INT 21H %JoxYy-
END Xza4iV
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x86 CPU,GNU/Linux,NASM A]y*so!)>
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 2)LX^?7R
;Enter this into "hello.asm" then type: /(6zsq'v|
;"nasm -f elf hello.asm" }ymvC
;"ld hello.o -o hello" #Q6w+"
;"./hello" =Lw3
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section .data ;data section declaration E3\ZJjG
msg db 'Hello World!',0AH z%2w(&1
len equ $-msg ;string length _-a|VTM
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section .text ;code section declaration 1$["79k
global _start ;entry point (start of execution) _`aR_%Gx
_start: mov edx,len ;string length L{PH0Jf
mov ecx,msg ;string start hLA;Bl
mov ebx,1 ;file handle: stdout GgdlVi 2
mov eax,4 ;sys_write 1Ii| {vR
int 80h ;kernel system call ph^4GBR
IRB& j%LA
mov ebx,0 ;return value %-^}45](q
mov eax,1 ;sys_exit 9/;{>RL=
int 80h ;kernel system call cF.mb*$K
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x86 CPU,Windows,MASM32 fA
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.386 [@.B4p
.model flat,stdcall k:0P+d
option casemap:none %]jQ48^R
;Include 文件定义 -Cj_B\
include windows.inc z> :U{!5k
include user32.inc 'O "kt T
includelib user32.lib v>I<|
include kernel32.inc FGVb@=TO>
includelib kernel32.lib u5 E/m
;数据段 XtW_
.data 4I ,o&TK
szCaption db 'A MessageBox!',0 pN k8! k
szText db 'Hello,world!',0 7\/u&
;代码段 I@PJl
.code ,8`O7V{W
start: #:W%,$9\P
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK |Y{PO&-?r
invoke ExitProcess,NULL B! `\L!
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 3/tJDb5
end start q!2<=:f
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AWK M71R -B`-
BEGIN { print "Hello, world!" } (HSw%e
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BASIC 00qZw?%K
传统版BASIC(例如GWBASIC): QZ0R :TY
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10 PRINT "Hello, world!" yM17H\ =
20 END i@{*O@m
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或在提示符输入: x vJ^@w'
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?"Hello, world!":END >W~=]&7{s4
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现代版BASIC(例如Quick BASIC): {e6KJ@H6
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Print "Hello, world!" #fzw WP
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以下的语句在Quick BASIC中同样有效: [iXi\Ex
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? "Hello,world!" MBv/
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BCPL .' IeHh
GET "LIBHDR" Q
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LET START () BE cl2ze
$( .r*#OUC
WRITES ("Hello, world!*N") >gGil|I
$) j #es2;
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Befunge +yIL[D
"!dlrow olleH">v P09,P
, .hgH9$\
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mCG;[4gM
Brainfuck tKX}Ok:V%
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< )?9\$^I
+++++++++++++++.>.+++.------.--------.>+.>. U>1b9G"_
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C >OTl2F}4 !
#include <stdio.h> -Fa98nV.WB
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int main(void) "YD.=s
{ 6,3}/hgWJ$
printf("Hello, world!\n"); ktWZBQY
return 0; iU,/!IQ
} ~Q_F~ 0y
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C++ uh1S
7!^
#include <iostream> a6P!Wzb
KDX$.$#
int main() }*Dd/'2+1
{ cL
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std::cout << "Hello, world!" << std::endl; M!-q}5' ;
return 0; .2/,XwIr
} !b'IfDp[-!
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C++/CLI =}"R5
int main() "W3W:vl!
{ &6Ns7w6*z
System::Console::WriteLine("Hello, world!"); q< b"M$
} HmFNE$k
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