“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。 #k>A,
;+o6"ky5
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[W*,7s
b"trg {e
以下是用不同语言写成的Hello World程序的几个例子: 7D 3-/_ v
Ada EDnZ/)6Gg
with Ada.Text_Io; use Ada.Text_Io; .EjR<UU
procedure Hello is @y * TVy
begin Pn@DHYP
Put_Line ("Hello, world!"); J
48$l(l3
end Hello; kou7_4oS
=h
~n5wQG
~mK+Q%G5
汇编语言 ?0JNaf
q*a~9.i@
x86 CPU,DOS,TASM g$hEVT
MODEL SMALL Y2dml!QM
IDEAL B~&}Mv
STACK 100H Wy-y-wi:p
,PJC FQMR
DATASEG R@_3?Z!W=
HW DB 'Hello, world!$' P-8QXDdr
Vwjic2lGI
CODESEG gnxD'1_
MOV AX, @data ?(Plb&kR
MOV DS, AX WT1y7+_g(d
MOV DX, OFFSET HW C"s-ttP
MOV AH, 09H 4UzXTsjM7
INT 21H >@4AxV\
MOV AX, 4C00H B/n~ $
INT 21H =43NSY
END V3a6QcG
yA_ly <
=
8y,7u)
x86 CPU,GNU/Linux,NASM ov Xk~%_
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). bF+j%=
;Enter this into "hello.asm" then type: f4+wP/n&
;"nasm -f elf hello.asm" `Gl[e4U
;"ld hello.o -o hello" )<_qTd0`
;"./hello" J}#2Wy^{
b+hN\/*]
section .data ;data section declaration :7dc;WdM
msg db 'Hello World!',0AH =9^}>u
len equ $-msg ;string length '#,C5*`
<$25kb R5K
section .text ;code section declaration zM<L_l&
global _start ;entry point (start of execution) >dD$GD{
_start: mov edx,len ;string length =#<bB)59
mov ecx,msg ;string start 5a)$:oO!
mov ebx,1 ;file handle: stdout /_Ku:?{
mov eax,4 ;sys_write hk
S:_e=
int 80h ;kernel system call j?k|-0
du#f_|xG
mov ebx,0 ;return value "*W# z
mov eax,1 ;sys_exit T3 4Z#PFwe
int 80h ;kernel system call . n)R@&9
CQrP%}`r
h.l.da1#
x86 CPU,Windows,MASM32 R(cg`8
.386 +*Uv+oC|
.model flat,stdcall 0)
F\aJ4Y
option casemap:none EYCZuJxv
;Include 文件定义 Km,o+9?1gF
include windows.inc WXDo`_{R
include user32.inc r
)_*MPY
includelib user32.lib #5'@at'1
include kernel32.inc u=vBjaN2_w
includelib kernel32.lib n4}e!
;数据段 s@y;b0$gk
.data SBDGms
szCaption db 'A MessageBox!',0 |>m'szca4
szText db 'Hello,world!',0 <o*b6m%
;代码段 uGqeT#dP
.code o8hE.pf&
start: F[!%,-*
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK 9PV+Kr!c5I
invoke ExitProcess,NULL iSW<7pNq0
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> U,61 3G
end start -o{ x
;:4
.cw)Y#;IG
e#mqerpJ
AWK UL>2gl4s/
BEGIN { print "Hello, world!" } op9vz[o#4
,9_O4O%
%N`_g' r!
BASIC Md~._@`|K
传统版BASIC(例如GWBASIC): B$x@I\(M
-qHG*v,
10 PRINT "Hello, world!" d,Oagx
20 END ~K<h~TNP
HuU$x;~
或在提示符输入: l}/&6hI+d
udBIEW,`
?"Hello, world!":END xa<KF
.s!0S-RkC
现代版BASIC(例如Quick BASIC): Ak kF6d+
YZSQOLN{
Print "Hello, world!" /4c`[
bM:4i1Z
以下的语句在Quick BASIC中同样有效: 6DK).|@$r
7Hgn/b[?b
? "Hello,world!" Pc< "qy
H.'9]*
XM
w6b*O
BCPL U1E@pDH
GET "LIBHDR" ?*+U[*M
~ho,bwJM[T
LET START () BE ~OPBZ#
$( Q#Zazvk
WRITES ("Hello, world!*N") a=A12<
$) <#nU 06 fN
}zsIp,
ort*Ux)
Befunge ipp`9 9
"!dlrow olleH">v 8Q<Nl=g>'
, .ve_If-Hg
^_@ &y=OZ
!M
F+Qnf'at1
)j~{P
Brainfuck :.]EM*p?GV
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< f:&JKB)N
+++++++++++++++.>.+++.------.--------.>+.>. O TlqJ
FZ+2{wIV^
L
FJ@4]%V
C R3lZ|rxv:
#include <stdio.h> )D6i {I0
U,v`md@PX
int main(void) YtSYe%
{ h'=)dFw7
printf("Hello, world!\n"); uj.$GAtO)
return 0; 8w:mL^6x
} ,e;,+w=~E
CkNR{?S
;7?oJH;
C++ ArAe=m!u
#include <iostream> 9=]HOUn
:'C?uk ?
int main() qg`ae
{
f&^}yqmuE
std::cout << "Hello, world!" << std::endl; ciml:"nQ
return 0; m)pHCS
} ?;`GCE
1)
2-UT
EHn!ZrQgh
C++/CLI 5Wa)_@qI)`
int main() ri59LY y=
{ u;rmqo1
System::Console::WriteLine("Hello, world!"); Nh^I{%.x
} ';Nc;9
xPUukmG:B
O4oN)
C# (C Sharp) ]f&]E
~i
class HelloWorldApp uIO,9> ee
{ e#h&Xa
public static void Main() YQ?hAAJ
{ O]hUOc`k
System.Console.WriteLine("Hello, world!"); i>h3UIx\
} |&MoQxw@
} AU`z.Isf
R+uZi~
<>n|_6'$90
COBOL c)^A|{,G
IDENTIFICATION DIVISION. oowofi(E
PROGRAM-ID. HELLO-WORLD. p7`9
d1n
t6KKfb
ENVIRONMENT DIVISION. DKMkCPX%
URm<