“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。 ]O:M$ $
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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》。 ,xJrXPW
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以下是用不同语言写成的Hello World程序的几个例子: b syq*
Ada G,&%VQ3P>
with Ada.Text_Io; use Ada.Text_Io; EruP
procedure Hello is ,KW;2t*IQ@
begin Hv#q:R8
Put_Line ("Hello, world!"); l QPqcZd
end Hello; ]kktoP|D
B%<e FFV\
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汇编语言 eR']#Q46{T
B\j~)vg
x86 CPU,DOS,TASM '(@YK4_M
MODEL SMALL 5/ecaAB2
IDEAL ;mm!0]V
STACK 100H &!7+Yb(1
<*'cf2Q$Av
DATASEG @%tXFizh
HW DB 'Hello, world!$' q5&Ci`
OKuD"
CODESEG HgJb4Fi
MOV AX, @data 'TN)Lb*
MOV DS, AX }|8*sk#[
MOV DX, OFFSET HW g=]&A
MOV AH, 09H g;F"7
^sg
INT 21H }4jC_ZAupt
MOV AX, 4C00H ty1fcdFZM
INT 21H
#S
QXTR
END 5#:pT
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x86 CPU,GNU/Linux,NASM 7r{qJ7$%
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). kL{;.WsB
;Enter this into "hello.asm" then type: 4dhqLVgL{
;"nasm -f elf hello.asm" GA^mgm"O
;"ld hello.o -o hello" 34C``i
;"./hello" jy$@a%FD
ayp b
section .data ;data section declaration 5P^ U_
msg db 'Hello World!',0AH _&{%Wc5W~F
len equ $-msg ;string length &TN2 HZ-bJ
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section .text ;code section declaration N}/>r D
global _start ;entry point (start of execution) 0TE@xqW
_start: mov edx,len ;string length "|LQK0q3
mov ecx,msg ;string start Q49BU@xX
mov ebx,1 ;file handle: stdout }*;EFR 6'
mov eax,4 ;sys_write (*^DN{5
int 80h ;kernel system call +!>LY
u?Hb(xZtg=
mov ebx,0 ;return value nW;kcS*A
mov eax,1 ;sys_exit 3_ 2hC!u!K
int 80h ;kernel system call VAj<E0>
&/F_*=VE
P@ypk^v
x86 CPU,Windows,MASM32 tbj=~xYf
.386 Z}Cqd?_')
.model flat,stdcall T nxKR$Hoh
option casemap:none #a}N"*P
;Include 文件定义 /5a;_
include windows.inc ,7/
_T\d<
include user32.inc =:K@zlO:
includelib user32.lib Lo3-X
include kernel32.inc mx tgb$*
includelib kernel32.lib Z.jCera.
;数据段 B3b,F #
.data JLUms
szCaption db 'A MessageBox!',0 <c%n?QK{
szText db 'Hello,world!',0 qpgU8f
;代码段 N du7nKG
.code !A-;NGxE
start: EVz9WY
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK BR3mAF
invoke ExitProcess,NULL q6)N*?
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Ru7L>(Njs
end start 22bT3
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gHH&IzHF
AWK -- S"w@
BEGIN { print "Hello, world!" } !$E~\uT
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03"#J2b
BASIC Oy'0I,
传统版BASIC(例如GWBASIC): jEE_D +K
7,su f }=
10 PRINT "Hello, world!" *^6k[3VY
20 END XPVV+.
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或在提示符输入: =#'+"+lQ }
|0DP}
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?"Hello, world!":END qa;EI ;8
scmto cm
现代版BASIC(例如Quick BASIC): |$ w0+bV*
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Print "Hello, world!" {6Y xN&
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以下的语句在Quick BASIC中同样有效: s#`cX0L)
:%>oe> _"
? "Hello,world!" e
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F]Pul|.l
(Z'WR
BCPL 2}|vWKej{
GET "LIBHDR" \|Y{jG<cu
+}\29@{W
LET START () BE 6|i`@|#
$( ;\q<zO@x
WRITES ("Hello, world!*N") n<+~ zQ
$) Hq79/wKj
h#;?9DP
"1\(ZKG8^Q
Befunge 0rGj|@+;
"!dlrow olleH">v mnQal>0~
, 8[f8k3g
^_@ 7kOE/>P?
\(wn@/yP'
C!`>cUhE{
Brainfuck EOofa6f&l
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< r$Yh)rpt:
+++++++++++++++.>.+++.------.--------.>+.>. % d4+Ctrp-
;cnnqT6
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C '"'D.,[W2
#include <stdio.h> eR(\s_`
z^YeMe
int main(void) <e$5~Spc
{ !4i,%Z&6
printf("Hello, world!\n"); t*5z1T?
return 0; z0=Rp0_W
} d%S=$}o
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wE-Ji<1HJ
C++ >SY2LmV'a
#include <iostream> _K*\}un2
5@GD} oAn6
int main() 8Pl+yiB/o`
{ 'Wo?%n
std::cout << "Hello, world!" << std::endl; Mb2:'u[
return 0; l{M;PaJ`}
} z"
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