“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。 >uy%-aXiVa
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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》。 IgM
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以下是用不同语言写成的Hello World程序的几个例子: -$YJfQE6G
Ada XmWlv{T+
with Ada.Text_Io; use Ada.Text_Io; S|K}k:v8
procedure Hello is A#DR9Eq
begin %0XvJF)s
Put_Line ("Hello, world!"); S LGW:
end Hello; ?`AGF%zp
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汇编语言 6>DLp}d
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x86 CPU,DOS,TASM rLF*DB3l
MODEL SMALL #?&0D>E?k
IDEAL r{[OJc!
STACK 100H 6sB$<#
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ZW
DATASEG Y=2Un).&
HW DB 'Hello, world!$' JsQ6l%9
kX2d7yQZz
CODESEG l,d, T
MOV AX, @data 6RK\}@^=K
MOV DS, AX "!Lkp2\
MOV DX, OFFSET HW :a3xvN-l
MOV AH, 09H [B9 ;?G
INT 21H 'MQ%)hipA
MOV AX, 4C00H -9o{vmB{
INT 21H G!Zyl^
END v0@)t&O
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x86 CPU,GNU/Linux,NASM `ZGcgO<c\
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). 4tJa-7
;Enter this into "hello.asm" then type: n%$ &=-Fk
;"nasm -f elf hello.asm" 8&E}n(XE
;"ld hello.o -o hello" C6QbBo
;"./hello" js <Ww$zFW
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section .data ;data section declaration N:W9},
msg db 'Hello World!',0AH >eS$
len equ $-msg ;string length }htPTOy5
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section .text ;code section declaration pbn\9C/
global _start ;entry point (start of execution) y=H@6$2EQ
_start: mov edx,len ;string length >n$!<
mov ecx,msg ;string start l[%lE
mov ebx,1 ;file handle: stdout (E!!pz
mov eax,4 ;sys_write Z'M`}3O
int 80h ;kernel system call 5 DFZ^~
&Lt@} 7$8
mov ebx,0 ;return value C2/}d? bki
mov eax,1 ;sys_exit h6M;0_'
int 80h ;kernel system call \Tm}mAvK/o
SY
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x86 CPU,Windows,MASM32 K2ewucn
.386 WzlC*iv
.model flat,stdcall I>"Ci(N
option casemap:none A6p`ma $L
;Include 文件定义 {a"RXa
include windows.inc &]iKriG
include user32.inc $f-hUOuyo
includelib user32.lib li/aN
include kernel32.inc ^^}Hs-{T
includelib kernel32.lib VKrShI
;数据段 -[]';f4]M
.data N"c(e6
szCaption db 'A MessageBox!',0 qnIew?-*
szText db 'Hello,world!',0 w~+ aW(2
;代码段 `}8&E(<
.code geGeZ5+B
start: r<yhI>>;<
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK PRr*]$\&Mj
invoke ExitProcess,NULL fL6e?\Pw
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ?[TW<Yx
end start GdA.g
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AWK AH d-
BEGIN { print "Hello, world!" } _gV8aH ZyM
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BASIC X")|Uw8Kl/
传统版BASIC(例如GWBASIC): Y25uU%6t_
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10 PRINT "Hello, world!" D>kD1B1
20 END (tCib 4
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或在提示符输入: "J19*<~
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?"Hello, world!":END {fz$Z!8-
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现代版BASIC(例如Quick BASIC): h;M3yTM-
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Print "Hello, world!" EHI 'xt
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以下的语句在Quick BASIC中同样有效: ctn,
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? "Hello,world!" h9CIZU[Nh
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BCPL VmvQvQ/9R
GET "LIBHDR" 3V;gW%>
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LET START () BE I/uy>*
$( 4Z5#F]OA7
WRITES ("Hello, world!*N") HEY4$Lf(I
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Befunge -9+se
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, {IM! Wb
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Brainfuck f)NHM'
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< K+d2m9C=
+++++++++++++++.>.+++.------.--------.>+.>. jRj=Awy
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C I.V:q!4*
#include <stdio.h> :b/J\
gv.6h{Ut
int main(void) ;O=h$8]
{ ,sQ93(Vo
printf("Hello, world!\n"); Lp&k3?W
return 0; D"l+iVbBP
} j^SZnMQf
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C++
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#include <iostream> Mr3-q
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int main() _8fA?q=
{ JK)qZ=
std::cout << "Hello, world!" << std::endl; b{cU<;G)y.
return 0; 0b-?q&*_
} p]&j;H.
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GjT#%GBF
C++/CLI d8x%SQ!V
int main() `8g7q 5
{ -_0?_Cb
System::Console::WriteLine("Hello, world!"); 'Pd(\$ZY
} p 2O~>97t1
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S2^>6/[xM
C# (C Sharp) {qpi?oY
class HelloWorldApp ZxHJ<2oD
{ #1/}3+=5B
public static void Main() gNj7@bX~
{ Y`ihi,s`H
System.Console.WriteLine("Hello, world!"); "v]%3i.*
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} D$r
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} f`$Gz
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P,z:Z|}8
COBOL VLvS$0(}Z
IDENTIFICATION DIVISION. eph)=F$
PROGRAM-ID. HELLO-WORLD. Zq"7,z7
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ENVIRONMENT DIVISION. "8<K'zeS8
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DATA DIVISION. {|<"C?
T3,1m=S
PROCEDURE DIVISION. QwWW!8
DISPLAY "Hello, world!". e@]-D
FG
STOP RUN. ~)X[(T{
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Common Lisp dQ:cYNm
(format t "Hello world!~%") h #.N3o
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