“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。 _5y3<H<?
{|bf`
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》。 i_Ab0vye
w>J|416
以下是用不同语言写成的Hello World程序的几个例子: GeD^-.^
Ada |-%[Z
with Ada.Text_Io; use Ada.Text_Io; ;i@,TU
procedure Hello is +\2{{~_z
begin N\BB8<F
Put_Line ("Hello, world!"); ?V3e;n
end Hello; QJjqtOf>
3a_~18W
ZG"_M@S.
汇编语言 5L'X3g
s,)Z8H
x86 CPU,DOS,TASM 9s7sn*aB#5
MODEL SMALL M<4~ewWJ
IDEAL 7X*$Fu<
STACK 100H tU.Y$%4
sFuB[
JJ}
DATASEG V'K1kYb
HW DB 'Hello, world!$' :=C-P7
,C1}gPQ6<
CODESEG |>Qj]
MOV AX, @data 1/:WA:]1,
MOV DS, AX ozy~`$;c
MOV DX, OFFSET HW &A)AV<=>T
MOV AH, 09H Y/?V%X
INT 21H Bq3" l%hI
MOV AX, 4C00H jhOQ)QE|
INT 21H 5ro^<P0f**
END uS`XWn<CSD
#(=8
RA:@
g4EC[>5!r
x86 CPU,GNU/Linux,NASM $F"'=+0
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ZxFRE#y~2
;Enter this into "hello.asm" then type: a<*q+a(*W
;"nasm -f elf hello.asm" '@i0~
;"ld hello.o -o hello" 50q(8F-N
;"./hello" rozp
m-Z<zEQ
section .data ;data section declaration 4i|yEf
msg db 'Hello World!',0AH LVP2jTz
len equ $-msg ;string length 38#BINhBt
wc`UcGO
section .text ;code section declaration nLicog)!I
global _start ;entry point (start of execution) F!(Vg
_start: mov edx,len ;string length ROsR;C0!
mov ecx,msg ;string start H]As2$[
mov ebx,1 ;file handle: stdout 8w/$!9[
mov eax,4 ;sys_write 3 }~.#`QeY
int 80h ;kernel system call wrI66R}@
uj;tmK>;
mov ebx,0 ;return value cBZ$$$v\#
mov eax,1 ;sys_exit G'<:O(Imu
int 80h ;kernel system call Mtq\xF,/+
1k"<T7K
|qTvy,U[
x86 CPU,Windows,MASM32 cuzU*QW"g
.386 rO4R6A
.model flat,stdcall [ @ >}
option casemap:none `Y]t*`
e|
;Include 文件定义 xU<WUfS1
include windows.inc W>W b|W
include user32.inc HueGARS
includelib user32.lib ;+C2P@M
include kernel32.inc PgHe;^?j
includelib kernel32.lib 5argw+2s4$
;数据段 tZ\e:AAi
.data 2[}
O:
szCaption db 'A MessageBox!',0 |z1er"zR)
szText db 'Hello,world!',0 89n\$7Ff9
;代码段 &Z'3n9zl
.code ETZE.a
start: w]1hoYuV
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK &`x1_*l
invoke ExitProcess,NULL !r^fX=X>'
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> [~_)]"pU
end start .Nk'yow
7]sRHX0o%
`4IZ4sPi
AWK / vgEDw
BEGIN { print "Hello, world!" } }Um,wY[tK
gI~B _0x
9!} ?}`'_
BASIC YOOcHo.F
传统版BASIC(例如GWBASIC): (:er~Y}
y[`>,?ns5
10 PRINT "Hello, world!" N$ oQK(
20 END !%X~`&9
nIZ;N!r=i
或在提示符输入: -A]-o
'`+8'3K~E
?"Hello, world!":END JsP<etX
~aBf.
现代版BASIC(例如Quick BASIC): (>49SOu;$\
2`d KnaF|
Print "Hello, world!" C*X=nezq
ibP IT!5c
以下的语句在Quick BASIC中同样有效: 3ch<a0
>:J7u*>$ '
? "Hello,world!" ,{6Vf|?
)x5t']w`K
4yK{(!&i+
BCPL +L0Jje>Az
GET "LIBHDR" {<cL@W
B)/L[ )S
LET START () BE @bRKJPU9)
$( e@h(Zwp
WRITES ("Hello, world!*N") 1VKu3
$) "%(SLQOyy
9QP- ~V{$
:_8Nf1B+T
Befunge v`r![QpYf
"!dlrow olleH">v -#Bk
, u_HCXpP!Q
^_@ {k}$L|w
k'8tqIUN]
F5y0(=$T
Brainfuck @#r6->%W
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< J5!-<oJ/
+++++++++++++++.>.+++.------.--------.>+.>. y
g:&cIr,
O2qy[]km
6n A/LW\x
C WhT5NE9t
#include <stdio.h> EvYe1Y-
k*4!rWr0r&
int main(void) %ZsdCQc{`
{ HT:V;?"
printf("Hello, world!\n"); ^>/~MCyM.
return 0; XjXz#0nR
} b|-}?@&7&q
i&TWIl8
W"Tj.oCUG
C++ #=V\WQb
#include <iostream> :u]QEZ@@
gb{8SG5ac
int main() :\Q#W4~p
{ e_YTh^wU
std::cout << "Hello, world!" << std::endl; 6bDizS}
return 0; dOT7;@
} 7#&e0fw/I
8S`
j6
f"z;'
C++/CLI T' =6_?7K4
int main() {TXfi'\
{ _v[gJ(F
System::Console::WriteLine("Hello, world!"); <2af&-EGs
}
7NvnCs
XL7||9,(h
'=0l{hv@
C# (C Sharp) R=2"5Hy=
class HelloWorldApp '':MhRb
{
x7xMSy
public static void Main() .uinv
{ !]3kFWs
System.Console.WriteLine("Hello, world!"); MTip4L W9
} cT5BBR
} bkuJN%
^[&,MQU{7
Wl7S<>hg4
COBOL bcgXpP
IDENTIFICATION DIVISION. -TMg9M4
PROGRAM-ID. HELLO-WORLD. 9m.MGJbQ_f
Dz&,g+>$J
ENVIRONMENT DIVISION. %'uei4
Jot7
L%,TB
DATA DIVISION. Bg[_MDWc-P
J4x|Af p
PROCEDURE DIVISION. hSz_e
DISPLAY "Hello, world!". uPy5<