“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。 4{ exv
o%73M!-
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》。 AKKVd%
P(
c}#(,<8X
以下是用不同语言写成的Hello World程序的几个例子: V4x6,*)e
Ada )yv~wi
with Ada.Text_Io; use Ada.Text_Io; PAy7b7m~B
procedure Hello is l)91v"vJ
begin aW$))J)0
Put_Line ("Hello, world!"); uBBW2
end Hello; I$Fr8R$
;F>I+l_X
uWerC?da
汇编语言 <e' l"3+9(
[wjH;f>SQ
x86 CPU,DOS,TASM >U')ICD~
MODEL SMALL A/*h[N+2!
IDEAL B7BikxUa
STACK 100H ?nx
1{2[
zH?&FtO
DATASEG 97SG;,6
HW DB 'Hello, world!$' 5%(xZ
6
oJ)v6"j
CODESEG 7)v`l1
MOV AX, @data bR?
$a+a)
MOV DS, AX Nx4X1j?-n
MOV DX, OFFSET HW jj"?#`cW
MOV AH, 09H
.)XJ-
INT 21H Y@M
l}43
MOV AX, 4C00H ;Ajy54}7
INT 21H 4xNzhnp|
END e.^Y4(
9]TvLh3
b'~IFNt*^
x86 CPU,GNU/Linux,NASM (Qys`D
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ) "Toh=x]
;Enter this into "hello.asm" then type: $5m_)]w4a
;"nasm -f elf hello.asm" Ty>g:#bogI
;"ld hello.o -o hello" -}2e+DyAy
;"./hello" rSfvHO:R
Lg4I6 G
section .data ;data section declaration iVGc\6+'
msg db 'Hello World!',0AH dd%-bI^
len equ $-msg ;string length Z<0+<tt
tqo!WuZAj
section .text ;code section declaration n/]$k4h
global _start ;entry point (start of execution) pu*vFwZ
_start: mov edx,len ;string length 2i~qihx5^
mov ecx,msg ;string start f@a@R$y
mov ebx,1 ;file handle: stdout Q-GnNT7MB3
mov eax,4 ;sys_write #GHLF
int 80h ;kernel system call U)N_/
A{Q :,S)
mov ebx,0 ;return value D;0xROW8{
mov eax,1 ;sys_exit ~|~j01#
int 80h ;kernel system call kDG'5X;+
cAE.I$T(
a/wkc*}}/
x86 CPU,Windows,MASM32 ,\K1cW~U5
.386 #}A
>B
.model flat,stdcall Bu$GC SrX
option casemap:none ~xg1mS9d
;Include 文件定义 +$+'|w
include windows.inc X;ZR"YgT
include user32.inc d6.9]V?
includelib user32.lib [T.BK:
include kernel32.inc ,SAS\!hsE
includelib kernel32.lib q#RVi8('
;数据段 t'EH_U
.data EO;f`s)t
szCaption db 'A MessageBox!',0 D n?P~%
szText db 'Hello,world!',0 [N/[7Q/y
;代码段 uj-q@IKe
.code 6#k
Ap+g7
start: X~Li`
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK zSYWNmj&
invoke ExitProcess,NULL PaEsz$mgy
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> {=,?]Z+
end start .O'gD.|^N
|400N
+MK
yV xR||e
AWK T!hU37g h?
BEGIN { print "Hello, world!" } )^^r\
*Df|D/,WE
'sm+3d
BASIC t?v0ylN
传统版BASIC(例如GWBASIC): jK&kQ
flLC\
10 PRINT "Hello, world!" zk4yh%Cd_
20 END O;:8mm%(
'MM#nQ\(
或在提示符输入: SF;;4og
d*1@lmV*
?"Hello, world!":END b=QO ^
];1z%.
现代版BASIC(例如Quick BASIC): B{|P}fN5}
@)m+O#a
Print "Hello, world!" UsYH#?|O
"wxs
以下的语句在Quick BASIC中同样有效: $<]y.nr|CX
b9OT~i=S|
? "Hello,world!" v^[Ny0cM
yaA9*k
C
did*hxJ
BCPL C>@~W(IE
GET "LIBHDR" -2tX 15,
T{|'<KT
LET START () BE 1(!QutEb
$( 'mug,jM
WRITES ("Hello, world!*N") "^<:7 _Y
$) k KL^U
TRAs5I%
{TdKS
Befunge #joU}Rj|
"!dlrow olleH">v +&a2aEXF
, 8{JTR|yB
^_@ 4\2p8__
I9SO}a2p
.HZYSY:X
Brainfuck Xb$)}n\9
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< {l *ps-fi
+++++++++++++++.>.+++.------.--------.>+.>. .t"s>jq 1
/,E%)K;
IO^O9IEx,
C 7:M%w'oR
#include <stdio.h> Lgvmk
N;<<-`i
int main(void) &xrm;pO
{ i&{8a3B
printf("Hello, world!\n"); \W}?4kz
return 0; ryN/sjQC
} OHM.xw*?.
1th|n
m0XK?;\V
C++ ^.nvX{H8~=
#include <iostream> 1AjsAi,7;2
UH%oGp$ykX
int main() F,11 \j
{ dV<M$+;s]
std::cout << "Hello, world!" << std::endl; cx_[Y
return 0; 6IctW5b
} e,Gv~ae9
zb?wlfT
PxfeU2^{0
C++/CLI $P866F
int main() )gmDxD
^C
{ zt[TShD^
System::Console::WriteLine("Hello, world!"); e%R+IH5i
} v@XQ)95]F
_ZzN}!Mye
5caYA&R
C# (C Sharp) bv\V>s
class HelloWorldApp 95T%n{rz
{ 8!VjXj"
public static void Main() Jj fNH
~
{ 8MX/GF;F
System.Console.WriteLine("Hello, world!"); $\81WsL'
} YUT"A{L
} Uf4QQ`c#
{;n?c$r
fX[,yc;
COBOL \$?[>=<wB
IDENTIFICATION DIVISION. D8m?`^Zz
PROGRAM-ID. HELLO-WORLD. ;FMK>%Zq
|GdA0y\v*}
ENVIRONMENT DIVISION. Q,#M
0
Pu/0<