“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。 IXz)xdP
l
;fO]{
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》。 Z1&<-T_
u/,ng&!
以下是用不同语言写成的Hello World程序的几个例子: gf]k@-)
Ada 2B!Bogs
with Ada.Text_Io; use Ada.Text_Io;
4u.v7r
procedure Hello is ;d#`wSF`G
begin 79Y;Zgv
Put_Line ("Hello, world!"); sX,."@[
end Hello; vIK+18v7
/Y7YyjMi
&%infPI'
汇编语言 f:!b0j
bS2)L4MQY
x86 CPU,DOS,TASM $z":E(oy
MODEL SMALL #]MV
IDEAL Y!0ZwwW
STACK 100H :5 zXW;s
{0?]weN*
DATASEG ;vkk$
-
HW DB 'Hello, world!$' ]?/7iM
:jP4GCxU|
CODESEG %s(Ri6R&
MOV AX, @data tl@n}
MOV DS, AX =eB^(!M
MOV DX, OFFSET HW `yXJaTbo
MOV AH, 09H J;mvD^`g
INT 21H )r +o51gp
MOV AX, 4C00H q'zV9
INT 21H /bBFPrW
END G*].g['
,|Xibfw
^5- 8'9 w
x86 CPU,GNU/Linux,NASM cCWk^lF],
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ~A-1x!YiU
;Enter this into "hello.asm" then type: 7hLdCS X
;"nasm -f elf hello.asm" &.4m(ZX
;"ld hello.o -o hello" U 5f<4I
;"./hello" \5ZDP3I
HZ8k%X}1
section .data ;data section declaration X1J'
msg db 'Hello World!',0AH |."thTO
len equ $-msg ;string length u,f$cR
'4x uH3
section .text ;code section declaration -$0w-M8'
global _start ;entry point (start of execution)
Z'ZN^j{
_start: mov edx,len ;string length !}$,) ~<+H
mov ecx,msg ;string start oDvE0"Sz
mov ebx,1 ;file handle: stdout /OaW4 b$Tz
mov eax,4 ;sys_write So^;5tG
int 80h ;kernel system call +. ` I
)8244;
mov ebx,0 ;return value *^WY+DV
mov eax,1 ;sys_exit 017(I:V?(:
int 80h ;kernel system call =w#sCy
_1sjsGp>
/#]4lFk:h
x86 CPU,Windows,MASM32 x*}*0).
.386 omEnIfQSO
.model flat,stdcall F~O}@e{
option casemap:none due'c!wW
;Include 文件定义 Q&d"uLsx
include windows.inc aIsT"6A~{
include user32.inc D)my@W0,
includelib user32.lib QaAWO
include kernel32.inc 'nR'o /!
includelib kernel32.lib "7RnT3
;数据段 .V.x0
.data nxZ[E.-\
szCaption db 'A MessageBox!',0 nTd[-3o
szText db 'Hello,world!',0 wFHbz9|@I
;代码段 rcx'`CIJ
.code F\"`^`(O
start: yo=0Ov
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK x+V@f~2F
invoke ExitProcess,NULL PE7D)!d
T
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> fZ6"DJZ
end start 1p%75VW
Vr1yj
zG0191f
AWK q8_8rp-@
BEGIN { print "Hello, world!" } <JyF5
#;WKuRv
Xu+^41
BASIC o7A+O%dX
传统版BASIC(例如GWBASIC): F4xXJ"vc
aVXk8zuL
10 PRINT "Hello, world!" | @Mx?(
20 END =,4iMENm!
X":T>)J-
或在提示符输入: FO/[7ZH
q(C <w
?"Hello, world!":END {*jo,<4ee
o8A1cb4<T
现代版BASIC(例如Quick BASIC): c@xQ2&i
g
AZe&"K
Print "Hello, world!" j4fv-{=$
c'gV
以下的语句在Quick BASIC中同样有效: Z<2j#rd
3{j&J-
? "Hello,world!" ;
wpX
]?$eBbt
~t ` uq
BCPL -T0@b8
GET "LIBHDR" &LD=Zp%
HLYTt)f}
LET START () BE }bZcVc2
$( \ O#6H5F
WRITES ("Hello, world!*N") #F~^m
$) ~g_]Sskf7
4*vV9*'!
x%WL!Lo
Befunge +"HLx%k
"!dlrow olleH">v F}C.F
, TcP
(?v
^_@ A3Lfh6O
jZ5 mpYUO
K\2UwX
Brainfuck AzmISm
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 9:\YEs"
+++++++++++++++.>.+++.------.--------.>+.>. NGYUZ\m
`]q>A']Dl
hj_%'kk-A
C {ejJI/o0
#include <stdio.h> />EH]-|
6*({ZE
int main(void) CI~P3"`]
{ b# RTHe&X
printf("Hello, world!\n"); }0 BKKU +
return 0; :{YOJDtR
} <Z -d5D>
1l(_SD;90t
u*aFWl]=
C++ >>nt3q
#include <iostream> l\NVnXv:>
P0 va=H
int main() _?+gfi+
{ 4 )U,A~!
std::cout << "Hello, world!" << std::endl; ycr\vn
t
return 0; T/$6ov+K
} Z^ e?V7q
k^vsQ'TD
@o g&l;
C++/CLI JQp::,g
int main() ^-24S#KE
{ <1L?Xhoc6
System::Console::WriteLine("Hello, world!"); O6[, K1,
} xMb)4 cw}
64hl0'67y
9~En;e
C# (C Sharp) !}TZmwf'
class HelloWorldApp Y~j)B\^{
{ '^!1A GF
public static void Main() zh<[/'l
{ eVVm"96Q.;
System.Console.WriteLine("Hello, world!"); xXJl Qbs
} 9MmAoLm
} *&m{)cTs
w[A$bqz
`h:$3a:5
COBOL J'%
IDENTIFICATION DIVISION. b&i0)/;
PROGRAM-ID. HELLO-WORLD. BM@:=>ypQ
NFEF{|}BM
ENVIRONMENT DIVISION. /tu+L6
$GR 3tLzK:
DATA DIVISION. ^F*G
h5x_Vjj
PROCEDURE DIVISION. +].Zs<