“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。 3\&I7o3V
7?"-NrW~
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》。 #]FJx
OK=ANQjs(
以下是用不同语言写成的Hello World程序的几个例子: .vhEm6wJUM
Ada
tz`T#9
with Ada.Text_Io; use Ada.Text_Io; bKP@-<:]
procedure Hello is $o>6Io|D
begin +pJ~<ug]
Put_Line ("Hello, world!"); {
^
@c96&
end Hello; R#Hz%/:|A
R)BH:wg"
9:]|TIPi
汇编语言 spv'r!*\ed
yh"48@L'D
x86 CPU,DOS,TASM Ts
1
MODEL SMALL ,S\AUUt%
IDEAL <%EjrjdvL+
STACK 100H \4roM1&[
LQ.0"6oj
DATASEG /faP@Q3kR
HW DB 'Hello, world!$' P'D'+qS
<<[\
Rv
CODESEG -JfO} DRI
MOV AX, @data A6%~+9
MOV DS, AX 73>Hzpv0
MOV DX, OFFSET HW 1n )&%r
MOV AH, 09H !DNk!]|
INT 21H LXx`Vk>ky
MOV AX, 4C00H -x2&IJ!
INT 21H %] [6TZ}
END vC ISd
*d$r`.9j
xmbFJUMH
x86 CPU,GNU/Linux,NASM Xe>
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). EK<ly"S.
;Enter this into "hello.asm" then type:
_V_GdQ
;"nasm -f elf hello.asm" 2kVQ#JyuRI
;"ld hello.o -o hello" hxx`f-#=
;"./hello" 1i:Q
%E
F
n`2LGc[rP
section .data ;data section declaration TC^fyxq
msg db 'Hello World!',0AH 7Hzv-s
len equ $-msg ;string length 7=[/J*-m
R?H[{AX
section .text ;code section declaration &(YNz9L
global _start ;entry point (start of execution) 5Int,SX
_start: mov edx,len ;string length t6a$ZN;
mov ecx,msg ;string start &&
E)
mov ebx,1 ;file handle: stdout +tvWp>T+
mov eax,4 ;sys_write =X}s^KbI{
int 80h ;kernel system call TOXZl3s5#
fT
mov ebx,0 ;return value vDp|9VY?
mov eax,1 ;sys_exit /dq(Z"O_
int 80h ;kernel system call b 3i34,
#>\%7b59>
&1$|KbmV4
x86 CPU,Windows,MASM32 ZIikDih1
.386 `CF.-Vl3J#
.model flat,stdcall ;;lOu~-*$p
option casemap:none %hH@< <b(s
;Include 文件定义 $V2.@X
include windows.inc h;S?
include user32.inc Kuy0Ci
includelib user32.lib P*.0kR1n
include kernel32.inc 56T{ JTo
includelib kernel32.lib 2L|)uCb
;数据段 LGPPyKNx
.data LQ3J$N
szCaption db 'A MessageBox!',0 ^muPjM+D
szText db 'Hello,world!',0 |tqYRWn0
;代码段 NG?- dkD
.code bbxo!K
m"
start: J\c\Ar:
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK gzeTBlXg
invoke ExitProcess,NULL Lm"zW>v
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (YKkJ
end start '
z]bcg$m
=Xh*w
AWK $61j_;WF`
BEGIN { print "Hello, world!" } A~%h*nZc%I
+w'He9n
%Tm8sQ)1
BASIC B7ty*)i?
传统版BASIC(例如GWBASIC): q_[V9
Z"Byv.yq b
10 PRINT "Hello, world!" +[Zcz4\9
20 END ^b@&O-&s
o0\d`0-el
或在提示符输入: v"J7VF2
"Iwd-#;$;
?"Hello, world!":END i*2l4
(4oO8aBB
现代版BASIC(例如Quick BASIC): #xBh62yIuP
~;P>}|6Y
Print "Hello, world!" bFtzwa5Gc
] R-<v&O
以下的语句在Quick BASIC中同样有效: mqk tM6
Gn}^BJN
? "Hello,world!" GG$&=.$
V/W{d[86G
~ w,hJ `
BCPL a0=>@?
GET "LIBHDR" &