“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。 a$p?r3y
t<M^ /xe2
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 5:%xuJD
D.zEE-cGyb
以下是用不同语言写成的Hello World程序的几个例子: P08=?
Ada "d60IM#N?
with Ada.Text_Io; use Ada.Text_Io; Ah,X?0+
procedure Hello is (+d7cln
begin 6]yYiz2Xn
Put_Line ("Hello, world!"); rmS.$h@7 m
end Hello; kw&,<V77 ~
*HFRG)[V
?El8:zt? |
汇编语言 ;*^2,_
YIv!\`^ \
x86 CPU,DOS,TASM SFVOof#s
MODEL SMALL 68
%=
V>V
IDEAL j^#4!Ue
STACK 100H +;uP)
"Q/L
n4;
DATASEG Gf'qPLK0
HW DB 'Hello, world!$' 4RCD<7
f8yE>qJP
CODESEG
C7#ji"t
MOV AX, @data We&~]-b AW
MOV DS, AX 6%bZZTP`
MOV DX, OFFSET HW U.]5UP:a
MOV AH, 09H ru#,pJ=O(
INT 21H a *?bnw?
MOV AX, 4C00H )Il)
H
INT 21H GCaiogiBg
END L?_'OwaY
iI T7pq1
|>_e&}Y%L
x86 CPU,GNU/Linux,NASM nn[OC=cDN
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). P2la/jN
;Enter this into "hello.asm" then type: cAFYEx/(
;"nasm -f elf hello.asm" g{|F<2rd[m
;"ld hello.o -o hello" HK_Vk\e
;"./hello" !1G6ZC:z
}7?n\I+n"
section .data ;data section declaration UnTnc6Bo7W
msg db 'Hello World!',0AH P/%5J3_,
len equ $-msg ;string length JZ=ahSi
d$DNiJ ,
section .text ;code section declaration D,R"P }G
global _start ;entry point (start of execution) <}Hfu-PLo
_start: mov edx,len ;string length v_U+wga
mov ecx,msg ;string start O_vCZW
a3
mov ebx,1 ;file handle: stdout ) W,tL*9[
mov eax,4 ;sys_write >|j8j:S[
int 80h ;kernel system call M N-j$-y}
!*I0}I
~
mov ebx,0 ;return value hIBW$
mov eax,1 ;sys_exit {Xr|L
int 80h ;kernel system call 9NXL8QmC8
E4}MU}C#[
{H F,F=W
x86 CPU,Windows,MASM32 \S5YS2,P
.386 +K2p2Dw(k
.model flat,stdcall X(r$OZ
option casemap:none tJ3Hg8;
;Include 文件定义 yj<j>JtN
include windows.inc [hhPkJf|f
include user32.inc %"yy8~|
includelib user32.lib c]Z@L~WW
include kernel32.inc 0:C ^-zrx
includelib kernel32.lib GkU]>8E'"
;数据段 :,8eM{.Q
.data %DQ!#Nl*
szCaption db 'A MessageBox!',0 1r:i'cWh
szText db 'Hello,world!',0 Xi
8rD"v
;代码段 ]=ubl!0=:
.code pw,
<0UhV
start: .&Ik(792Z&
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK =NNA7E7c
invoke ExitProcess,NULL =w,cdU*
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> x<=<Lx0B;
end start [TaYNc!\
bnZ`Wc*5b
w~a_FGYX
AWK &sA@!
BEGIN { print "Hello, world!" } [&MhAzF
e0e3b]
Yn>y1~
BASIC 9{-
Sa
传统版BASIC(例如GWBASIC): b^dBX
p E56CM
10 PRINT "Hello, world!" BpR#3CfW
20 END 6
_n~E e
IEj=pI
或在提示符输入: S(NUuu}S
<&m
`)FJ
?"Hello, world!":END |+h8g@;Z
fa#5pys
现代版BASIC(例如Quick BASIC): =N?K)QD`
egHvI&w"o
Print "Hello, world!" r>kDRIHB
\f-HfYG
以下的语句在Quick BASIC中同样有效: m2r%m
y
JANP_b:t
? "Hello,world!" ,0fYB*jk
Hphfqdh0`
<&87aDYz
BCPL xA#'%|"
GET "LIBHDR" tLc~]G*\`s
<pp<%~_Z
LET START () BE \EC7*a0
$( $?Yw{%W
WRITES ("Hello, world!*N") g|
M@/Dl
$) ?]Z EK8c
0o*
8pE0ANbq
Befunge nv-_\M
"!dlrow olleH">v \*x=q20
, L\/YS;Y
^_@ <CM}g4Y
M
hJ;)(
KGq4tlM6
Brainfuck *=~X1s
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ]>'yt #]
+++++++++++++++.>.+++.------.--------.>+.>. L|pJ\~
1u\kxlZ
"YQ%j+
C -7\6j#;l
#include <stdio.h> K" U!SWv
uom~,k$|
int main(void) R`F8J}X_
{ l0g`;BI_
printf("Hello, world!\n"); sXmo.{Ayb
return 0; 8QaF(?
} MI<XLn!*
Xy'qgK?
.}||!
C++ ;rJ
#include <iostream> #&jr9RB
7IV:X
_y
int main() 2xJT!lN
{ 0-{l4;o
std::cout << "Hello, world!" << std::endl; {Vj25Gt
return 0; D8I)3cXa'
} {cF>,T
avI
fqgm`4>
C++/CLI K`d3p{M
int main() 7Yjxx+X9
{ 68v59)0U
System::Console::WriteLine("Hello, world!"); [
queXDn"m
} 7L=V{,,v
}:5>1FfX=
/\B[lRn
C# (C Sharp) uVBMI.&w
class HelloWorldApp VSI.c`=,
{ @`X-=GCl
public static void Main() LpJ_HU7@lk
{ |UO&18Y7-
System.Console.WriteLine("Hello, world!"); [!v|
M
} ecI[lB
} -}?ud3f<
;%R+]&J
fWBI}~e
COBOL UkY
`&&ic