“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。 S:DcfR=a
-U&098}<K
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》。 y;*My#
I-j(e)P(o_
以下是用不同语言写成的Hello World程序的几个例子: 6NP`P j R
Ada Gf!t< =T
with Ada.Text_Io; use Ada.Text_Io; LH1BZ(5g
procedure Hello is +X{cN5Y K
begin UX+?0 K
Put_Line ("Hello, world!"); ,(zcl$A[
end Hello; 6i55J a
4h[2C6
\+`
K>`m_M"LA
汇编语言 !;6W!%t.|
$=X!nQ& Z|
x86 CPU,DOS,TASM S;G"L$&\
MODEL SMALL 75' Ua$
IDEAL *(>F'>F1"
STACK 100H 8yNRxiW:
B>c[Zg1
DATASEG ](idf(j
HW DB 'Hello, world!$' 99=[>Ck)G
\Or]5ogT'
CODESEG z0FR33-
MOV AX, @data X:iG[iU*
MOV DS, AX %l0_PhAB
MOV DX, OFFSET HW Z%(Df3~gmm
MOV AH, 09H jTGS6{E
INT 21H !:R^}pMhIk
MOV AX, 4C00H U]1>?,Nk'3
INT 21H N GX-'w
END b*9m2=6
:C}KI)
$L $j
KNwf
x86 CPU,GNU/Linux,NASM S+4I[|T]Y
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Ta!m%=8
;Enter this into "hello.asm" then type:
}j]<&I}
;"nasm -f elf hello.asm" +^o3}`
;"ld hello.o -o hello" :K
a^
;"./hello" UeIqAG 8
S S7D1
section .data ;data section declaration j X^&4f
msg db 'Hello World!',0AH !c3Qcva
len equ $-msg ;string length vgd}09y
fbW,0
section .text ;code section declaration 23.y3t_?
global _start ;entry point (start of execution) MV:<w3!
_start: mov edx,len ;string length Z)b)v
mov ecx,msg ;string start ?et0W|^k
mov ebx,1 ;file handle: stdout OdtbVF~
mov eax,4 ;sys_write ?ZD{e|:u
int 80h ;kernel system call rVc
zO+E
:d:|7hlNQ
mov ebx,0 ;return value Y:#kel<
mov eax,1 ;sys_exit ~`W6O>
int 80h ;kernel system call 2xz%'X%
'2i)#~YO<
!rN#PF>
x86 CPU,Windows,MASM32 `t/@ L:
.386 pEqr0Qwh
.model flat,stdcall PAO[Og,-
option casemap:none H@OrX
;Include 文件定义 hA&j?{
include windows.inc UGezo3}
include user32.inc H_xQ>~b
includelib user32.lib ~Iu21Q(*
include kernel32.inc /I`!iK
includelib kernel32.lib -hJ>wGI
;数据段 HquB*=^xh
.data nATfmUN
L
szCaption db 'A MessageBox!',0 \I`=JKYT
szText db 'Hello,world!',0 6>P
;代码段 xhp-4
.code 6O[wVaC1u
start: A(_^_p.|
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK a v|6r#
invoke ExitProcess,NULL 1' @lg*^9
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> eO[Cb]Dy:
end start bo?3E +B
]CtoK%k
d"e%tsj
AWK Q'%5"&XFD
BEGIN { print "Hello, world!" } R)DNFc:
d
>wmg*J
%RK\Hz2q3
BASIC t,r&SrC
传统版BASIC(例如GWBASIC): 8=zM~v)
p7ns(g@9
10 PRINT "Hello, world!" W@uH!n>k
20 END 9^[5!SMzCj
&>wce5uV
或在提示符输入: dp%pbn6w
G\aLg
?"Hello, world!":END y:|Xg0Kp
J,77pf!B
现代版BASIC(例如Quick BASIC): ]oWZ{#r2
:6Pc m3
Print "Hello, world!" #|*,zIYo
Q i'WV9ke
以下的语句在Quick BASIC中同样有效: ,VcDvZ7
BD-c 0-+m
? "Hello,world!" ,oi`BOh
wDC/w[4:
O%Gsk'mo
BCPL lXL7q?,9
GET "LIBHDR" "8iyMP%8
|?t8M9[Z
LET START () BE {dr&46$p
$( (8eNZ*+mO
WRITES ("Hello, world!*N") =='{[[J
$) lN`_0
Dy!bj
5}l#zj
Befunge 7)6Yfa]I%
"!dlrow olleH">v [E
:`jY
, d ;7pri)B
^_@ 0)] C&;}_M
SYW=L
1j)!d$8
Brainfuck :"+UG-S$6
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< meVVRFQ2+
+++++++++++++++.>.+++.------.--------.>+.>. QmkC~kK1.
8UY=}R2C
pQ-^T.'
C LK-6z w5=(
#include <stdio.h> oTV8rG
SAxa7B/U2
int main(void) #* /W!UOu
{ V]PhXVJ
printf("Hello, world!\n"); LkZo/K~
return 0; He_(JXTP
} ';CuJXAj
[+cnx21{
'LLQ[JJ=O
C++ a]=vq(N'r
#include <iostream> ?`*-QG}
s2v#evI`+
int main() sq(063l
{ en#g<on
std::cout << "Hello, world!" << std::endl; )PoI~km
return 0; U.j\u>a
} $^D(%
(>5VS
yLIj4bf
C++/CLI :AcNb
int main() VOK$;s'9}
{ f;XsShxr
System::Console::WriteLine("Hello, world!"); \t(r@qq
} a=T7w;\h
0}7Rm>
jl0Eg
C# (C Sharp) r-Xe<|w
class HelloWorldApp xS-nO_t 'E
{ Nb9V/2c;V
public static void Main() OVo
{ ~aR='\<