“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。 @wPmx*SF
+1%6-g4"
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》。 7$;$4.'
G!IQ<FuY
以下是用不同语言写成的Hello World程序的几个例子: U8mu<)
Ada pf_ /jR
with Ada.Text_Io; use Ada.Text_Io; 2^aTW`>L
procedure Hello is A0ToX) |C
begin !Z ZA I_N
Put_Line ("Hello, world!"); ;a`X|N9
end Hello; ~83P09\T%
1DP)6{x
@6SSk=9_S
汇编语言 ik*_,51Zj
@n(In$
x86 CPU,DOS,TASM YB|9k)Z2[
MODEL SMALL kes'q8k
IDEAL ihVQ,Cth
STACK 100H =!X4j3Cv
ZIp=JR8o$
DATASEG EUkNh>U?
HW DB 'Hello, world!$' =)8Ct
68*{Lo?U
CODESEG _;{-w%Vf
MOV AX, @data qg/5m;U
MOV DS, AX I .ty-X]
MOV DX, OFFSET HW z"#.o^5
MOV AH, 09H Q/9b'^UJ
INT 21H [}p.*U_nw
MOV AX, 4C00H 'Ot[q^,KRG
INT 21H l?o-
p
END 0Pk-FSY|f
[)A#9L~s=
fLAF/#\2
x86 CPU,GNU/Linux,NASM 2LU'C,o?
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). P>-,6a>
;Enter this into "hello.asm" then type: $EIkk= z
;"nasm -f elf hello.asm" D,/9rH
;"ld hello.o -o hello" Ah6x2(:
;"./hello" A2d2V**Z
]Yex#K
section .data ;data section declaration ihrrmlN?
msg db 'Hello World!',0AH D.b<I79bX
len equ $-msg ;string length 0 y%R
}[`?#`sW
section .text ;code section declaration t,,^^ll
global _start ;entry point (start of execution) eZi<C}z
_start: mov edx,len ;string length (&,R1dLo
mov ecx,msg ;string start d
]
;pG(
mov ebx,1 ;file handle: stdout )[*O^bPowI
mov eax,4 ;sys_write \irjIXtV
int 80h ;kernel system call |5Pbc&mH8A
kVv
<tw
mov ebx,0 ;return value }q W aE
mov eax,1 ;sys_exit k;5}@3iQ
int 80h ;kernel system call r.;iO0[/
Gu).*cU
rR~X>+K
x86 CPU,Windows,MASM32 w ZAXfNA
.386 ~0|hobk
.model flat,stdcall 2\de |'
option casemap:none Fr3t[:D
;Include 文件定义 x["
include windows.inc nif'l/@"
include user32.inc ]s@8I2_
includelib user32.lib #7h fEAk
include kernel32.inc Y +54z/{
includelib kernel32.lib Ui!|!V-
;数据段 rbbuSI
.data u0b-JJ7)BQ
szCaption db 'A MessageBox!',0 sEyl\GL
szText db 'Hello,world!',0 S45>f(!
;代码段 TP::y
.code j:3Hm0W3
start: h+D=/:B
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK u$8MVP
invoke ExitProcess,NULL Cl!jK^AbG
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> {1|7N
GQ
end start ZF(=^.gc
V JL;+
W2h[NimU
AWK (t$/G3E
BEGIN { print "Hello, world!" } cV,Dl`1r
1C=P #MU`
FSs$ ]
d;
BASIC P'9io!Z-s
传统版BASIC(例如GWBASIC): WI_mJ/2
]_8I_VcQ
10 PRINT "Hello, world!" `0|&T;7
20 END L$Ar]O)
J6D$ i+
或在提示符输入: -U[`pUY?f
Fjt,
?"Hello, world!":END \'Kj.EO{?$
$#3<rcOq
现代版BASIC(例如Quick BASIC): z|)1l`
}#5roNH~Z
Print "Hello, world!" C/XyDbH
a' o8n6i
以下的语句在Quick BASIC中同样有效: }p?V5Qp
Vj`s_IPY
? "Hello,world!" Q$/F gS
"0zXpQi,B
M|e
n>P
BCPL (Gc`3jJ
GET "LIBHDR" =3dbw8I
<|Eby!KXR
LET START () BE |S`yXsg
$( 9R"N#w.U]
WRITES ("Hello, world!*N") <L/vNP
$) n4T2'e
p+UHJ&
4Xk;Qd
Befunge F6]!?@
"!dlrow olleH">v oHd0
<TO
, +gCy@_2;
^_@ P Xn>x8z
0lr4d Y
i}F;fWZ`
Brainfuck )"jn{%/t
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< ]{+M>i[
+++++++++++++++.>.+++.------.--------.>+.>. [k7N+W8
JD`;,Md
udI:]:,P
C ,h.Jfo54,
#include <stdio.h> yi-"hT`
5>[sCl-
int main(void) @^6OV)
{ U{uWk3I_b
printf("Hello, world!\n"); 4$DliP
return 0; =k<4mlok^
} <;0N@
';|>`<
JX$NEq(
C++ \ +-hn
#include <iostream> =)1YYJTe9
5@t uo`k
int main() jsi#l
{ c$<O0dI
std::cout << "Hello, world!" << std::endl; Iki+5
return 0; ) a\DS yr
} >c\v&k>6.
)F#<)Evw
CSqb)\8Oi*
C++/CLI q
'{<c3&
int main() akc"}+-oX
{ r,@X>_}
System::Console::WriteLine("Hello, world!"); qb&NS4#
} eTRx 6Fri(
-WBz]GW4r
o7a6 )2JK
C# (C Sharp) mc=!X
class HelloWorldApp .Jat^iFj0
{ mx(%tz^t
public static void Main() QDgEJ%U-
{ Nw>T$RzS
System.Console.WriteLine("Hello, world!"); Nk7e iQ
} MD
?F1l"}%
} | ]!Ky[P
$x_52 j\j
,{ L;B
COBOL $aPHl
IDENTIFICATION DIVISION. [gh[F
PROGRAM-ID. HELLO-WORLD. LXu"rfp
%v+fN?%x,d
ENVIRONMENT DIVISION. ]1|Ql*6y,
nL(%&z \4
DATA DIVISION. 1QF*e'
.m]=JC5'
PROCEDURE DIVISION. E%\7Uo-
DISPLAY "Hello, world!". w]Ko/;;^2
STOP RUN. 90h1e7ZcC
kGuk
-P
$sL|'ZMbS
Common Lisp Wt)SdF=U/
(format t "Hello world!~%") ZH$sMh<xg
8} ?Y;>s\
)lDIzLp
DOS批处理 p-'6_\F.Ke
@echo off NzeI/f3K5
echo "Hello, world!" tC@zM.v%
mQ^@ \s
Oz#EGjz
Eiffel 78a-3){
class HELLO_WORLD VmOFX:j!,
+/!=Ub[:U
creation A{8K#@!
make VkTlPmr
feature DYT -#Ht
make is m]=oaj@9
local iy.%kHC
io:BASIC_IO oF@x]bmU
do ULNAH`{D
!!io v<7Gln
io.put_string("%N Hello, world!") D _bkUR1
end -- make {r].SrW9s9
end -- class HELLO_WORLD `J=1&ae