“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。 o$VH,2 QF
3 ?F@jEQk
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 03WRj+w
X.l"f'`l
以下是用不同语言写成的Hello World程序的几个例子: ~q(C j"7
Ada 2gAdZE&Y
with Ada.Text_Io; use Ada.Text_Io; ,jsx]U/^
procedure Hello is ~#_$?_/(
begin lMez!qx,=
Put_Line ("Hello, world!"); N>%KV8>{L
end Hello; y=xe<#L
g/Jj]X#r
cGta4;
汇编语言 IQ=|Kj9h
K)UOx#xe1
x86 CPU,DOS,TASM "!6~*!]c
MODEL SMALL 8M+F!1-#
IDEAL xKST-:c +
STACK 100H ?{,)XFck
14 'x-w^~k
DATASEG #4 &N0IG
HW DB 'Hello, world!$' 1r&
?J.z25
|/=p
CODESEG n UCk0:{
MOV AX, @data EJaaW&>[
MOV DS, AX L_ qv<iM$
MOV DX, OFFSET HW AJlIA[Kt:
MOV AH, 09H k`mrRs
INT 21H 8sF0]J[g{
MOV AX, 4C00H ;To+,`?E;q
INT 21H .N5R?fmD
END rbun5&RCyW
PB<Sc>{U
#'Y6UGJ\n
x86 CPU,GNU/Linux,NASM zGd*Q5l
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). ,
gr&s+
;Enter this into "hello.asm" then type: GVc[p\h(
;"nasm -f elf hello.asm" mRnzP[7-\)
;"ld hello.o -o hello" ae#HA[\0G
;"./hello" Qn)[1v
IA 9v1:>
section .data ;data section declaration QqK{~I|l
msg db 'Hello World!',0AH G%8)6m'3
len equ $-msg ;string length r]EZ)qp^@
X:-bAu}D
section .text ;code section declaration PSqtZN
global _start ;entry point (start of execution) $_7d! S"
_start: mov edx,len ;string length r]//Q6|S
mov ecx,msg ;string start nB Iv{
mov ebx,1 ;file handle: stdout '`~(Fkj
mov eax,4 ;sys_write `{Di*
int 80h ;kernel system call LOUKURe E
$17
v,
mov ebx,0 ;return value -5,y
1_M
mov eax,1 ;sys_exit ="w8U'
int 80h ;kernel system call }V#9tWW
h:Mn$VR,
2N8sq(LK{
x86 CPU,Windows,MASM32 ^@LhUs>3
.386 V?V)&y] 4
.model flat,stdcall ~v(M6dz~vk
option casemap:none 3g#=sd!0O@
;Include 文件定义 IfmIX+t?
include windows.inc 9Bvn>+_K
include user32.inc ?]:EmP
includelib user32.lib g yH7((#i
include kernel32.inc 9k+&fyy
includelib kernel32.lib k#:@fH4{PA
;数据段 vl{_M*w
;
.data m57tOX
szCaption db 'A MessageBox!',0 OG?j6qhpl
szText db 'Hello,world!',0 tqwk?[y}+l
;代码段 ];{l$-$$
.code a(43]d&
start: i_'R"ob{S
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK "tz0ko,(
invoke ExitProcess,NULL k1Mxsd
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Gg pQ]rw
end start #b"5L2D`y'
sHPwW5j/o'
0jJ28.kOp
AWK (zw=qbS&
BEGIN { print "Hello, world!" } "G-0i KW;
-2jBs-z
OxHw1k
BASIC )3`
传统版BASIC(例如GWBASIC): #9hXZr/8
#nf%ojh
10 PRINT "Hello, world!" QOh w
20 END mLk6!&zN
XAULD]Q
或在提示符输入: lF}$`6
i h$@:^\
?"Hello, world!":END 77&^$JpM
400Tw`AiJ
现代版BASIC(例如Quick BASIC): G0;EbJ/&
WP@JrnxO\`
Print "Hello, world!" <;,S"e
Th;gps%b
以下的语句在Quick BASIC中同样有效: J.e8UQ@=5
D@rn@N
? "Hello,world!" ! N"L`RWD
g"dZB2`C
({H+ y
9n
BCPL ^~r&}l4c,
GET "LIBHDR" hNq8
uyKx
5Ckk5b
LET START () BE C>`.J_N
$( 9*TS90>a
WRITES ("Hello, world!*N") ox\B3U%`p}
$)
IB.'4B7
ofPF}
Nvx)H(8F
Befunge 10l1a4
"!dlrow olleH">v QC\g%MVG
, !AD0-fZ
^_@ TA@tRGP>
/VmCN]2AZ
d[>N6?JA/
Brainfuck +zVcOS*-
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 2NArE@
+++++++++++++++.>.+++.------.--------.>+.>. sQ>B_Y!
b!^M}s6
=@1R ozt
C ;*)fO?TG)
#include <stdio.h> JJ
N(M*;
e1 {t0f
int main(void) we H@S
{ A}#]g>L
printf("Hello, world!\n"); mSw?2ba
return 0; An8%7xa7
} kh>SrW]B%
'!yS72{$2
g@k#J"Q'[
C++ q(jkit~`A
#include <iostream> vU8FHVytV
[N+ m5{tT
int main() 6L:trLuQ
{ <