“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。 ~JohcU}d
qnf\K}
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》。 RBOhV/f
=B
ts
以下是用不同语言写成的Hello World程序的几个例子: HG[gJ7
Ada &Y$)s<u8.
with Ada.Text_Io; use Ada.Text_Io; #L xfE<^
procedure Hello is anFl:=
begin i|G /x
Put_Line ("Hello, world!"); Ct}rj-L<i
end Hello; U<U?&hB\@
a,\GOy(q{
mcSZ1d~,(
汇编语言 >2;KPV0H
J*]JH{
x86 CPU,DOS,TASM |~YhN'OJ
MODEL SMALL 0coRar?+b
IDEAL juBzpQYj
STACK 100H q@iZo,Yk
mW @Z1Plxs
DATASEG \h7XdmA]~
HW DB 'Hello, world!$' 9XW[NY#)#
Aq{7WA
CODESEG 4mF=A$Q_/
MOV AX, @data `/eh
MOV DS, AX T( sEk
MOV DX, OFFSET HW Kw,ln<)2
MOV AH, 09H $
iU~p
INT 21H LX iis)1
MOV AX, 4C00H vX"jL
INT 21H v*EErQML8b
END D[CEg2$y
u^&,~n@n7
Xc7Qu?}
x86 CPU,GNU/Linux,NASM _c6 zzGtH
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). u"M^qRhD
;Enter this into "hello.asm" then type: /R)(u@jk
;"nasm -f elf hello.asm" wvg>SfV,e
;"ld hello.o -o hello" =/F\_/Xw
;"./hello" D_Cd^;b
^W<uc :L7
section .data ;data section declaration @)m+b;
msg db 'Hello World!',0AH K9f7,/
len equ $-msg ;string length D`r_ Dz
[:C!g#o
section .text ;code section declaration `PvGfmYOl
global _start ;entry point (start of execution) ]e]l08
_start: mov edx,len ;string length 6d|%8.q1
mov ecx,msg ;string start n{r_Xa
mov ebx,1 ;file handle: stdout ppo\cy;
mov eax,4 ;sys_write 0qMf6
int 80h ;kernel system call *`.4M)Ym~
.6#Y-iJqc
mov ebx,0 ;return value -YP>mwSN?
mov eax,1 ;sys_exit e8<[2J)P&
int 80h ;kernel system call KmlpB
$2\k| @)s
_Vxk4KjP5
x86 CPU,Windows,MASM32 ~",,&>#[K
.386 haMt2S2_B:
.model flat,stdcall Qr
l> A*
option casemap:none :i ft{XR'
;Include 文件定义 :N([s(}!$2
include windows.inc (~FLG I
include user32.inc h*-j
includelib user32.lib ;qT7BUh(%
include kernel32.inc zSFqy'b.M-
includelib kernel32.lib #.n%$r
;数据段 b bO1`b-
.data y~\K~qjd
szCaption db 'A MessageBox!',0 sw715"L
szText db 'Hello,world!',0 _GK3]F0
;代码段 wFJ?u?b0Q
.code saaN$tU7
start: 4aQb+t,
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK c0%%X!!$
invoke ExitProcess,NULL i@M^9|Gh
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> &% \`Lwh
end start yy6?16@
icPg<>TQ
e.|_=Gd2/
AWK r%/*,lLO
BEGIN { print "Hello, world!" } ,,>b=r_r&
a jCx"J
g.d%z
BASIC
B)M& FO
传统版BASIC(例如GWBASIC): +L86w7
^3L6mOoA
10 PRINT "Hello, world!" ~D)!zQkD
20 END 'B>%5'SdD
bNG;`VZ%
或在提示符输入: >"Z^8J
yw%5W=<
?"Hello, world!":END [1Yx#t
0/."R;
现代版BASIC(例如Quick BASIC): ='0f#>0Q
}'KVi=qnHb
Print "Hello, world!" siHS@S
YEWHr>&Z
以下的语句在Quick BASIC中同样有效: d4#Q<!r
GP5Y5)
? "Hello,world!" KGclo-,
bV#U&)|
<ealt
BCPL D %`64R
GET "LIBHDR" [9WtoA,kx
Ab<4F7
LET START () BE [y73
xF
$( {P_~_5o_
WRITES ("Hello, world!*N") DG x9 \8^
$) Q)c$^YsI
q9RCXo>Y+1
D@yg)$;z
Befunge IPU'M*|Q
"!dlrow olleH">v -}m#uUqI
, Ds$8$1=L=k
^_@ |#x;}_>7
" -4V48ci
E/<[G?
Brainfuck /vl]Oa&U
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< k[l+~5ix
+++++++++++++++.>.+++.------.--------.>+.>. b'^OW
J<Wz3}w6
,P ?TYk
C fv!l {
#include <stdio.h> \`#;J?Y|`F
xa`&/W >
int main(void) 22\Buk}?
{ _F^k>Lq&