“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。 u}nS dZC
a}%f+`z
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》。 wo0j/4o
O^MI073Q>t
以下是用不同语言写成的Hello World程序的几个例子: \t!~s^ Oox
Ada ,JZ>)(@)
with Ada.Text_Io; use Ada.Text_Io; 7% D 4
procedure Hello is "UTW(~D'
begin Jo {:]:
Put_Line ("Hello, world!"); r'*$'QY-N
end Hello; 'OA*aQ=K
Lu}jk
W*
%nZ:)J>kz
汇编语言 9`*ST(0/
`D77CC]vU
x86 CPU,DOS,TASM 5pJe`}O4
MODEL SMALL "TA0--6
IDEAL LaQ7A,]
STACK 100H h+W$\T)
'f6H#V*C
DATASEG @[g7\d
HW DB 'Hello, world!$' 3jAr"xc
O t)}:oG
CODESEG &4:R(]|
MOV AX, @data =cEsv&i
MOV DS, AX 3mHzOs\jU
MOV DX, OFFSET HW lOt7ij(,L
MOV AH, 09H e-rlk5k%f
INT 21H $2a"Ec!7
MOV AX, 4C00H =de'Yy:\-
INT 21H ]6e(-v!U
END Jc#D4e1#
i.t%a{gL
G!6b
)4L-
x86 CPU,GNU/Linux,NASM 5sT3|yq
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). to?! qxn
;Enter this into "hello.asm" then type: 1sHjM%
;"nasm -f elf hello.asm" mXz*Gi
;"ld hello.o -o hello" `6~0W5
;"./hello" :K6JrS
W0f^!}f(
section .data ;data section declaration PLkS-B
msg db 'Hello World!',0AH :i<*~0r<
len equ $-msg ;string length JdS,s5Z>
R;!,(l
section .text ;code section declaration !mxH/{+|n
global _start ;entry point (start of execution) BEOPZ[Q|c
_start: mov edx,len ;string length hWy@?r.
mov ecx,msg ;string start +cH>'OXoB
mov ebx,1 ;file handle: stdout iAz0 A
mov eax,4 ;sys_write <L]Gk]k_R
int 80h ;kernel system call jfMkN
qx ki
mov ebx,0 ;return value VW\S>=O99
mov eax,1 ;sys_exit b$b;^nly
int 80h ;kernel system call bA)nWWSg=
J1G}l5N
AIg4u(j
x86 CPU,Windows,MASM32 2fTuIS<yr
.386 dL$ iTSfz"
.model flat,stdcall ;z4J)qw
option casemap:none i%FC
lMF
;Include 文件定义 MDF_Xr-hZ
include windows.inc O(/~cQ
include user32.inc }&vD(hX
includelib user32.lib yP{ 52%|+
include kernel32.inc !Aj}sh{
includelib kernel32.lib vxZ'-&;t
;数据段 *:n7B\.
.data f]r*;YEc4
szCaption db 'A MessageBox!',0 c]{}|2u
szText db 'Hello,world!',0 jC'h54,Mr
;代码段 ]AYP\\Xi
.code wY<s
start: 8JY0]G6
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK )NZH{G
invoke ExitProcess,NULL v Z9OJrF
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WK6,K92
end start -zFJ)!/?
6Hnez @d
Dz0D ^(;V
AWK _8.TPB]no
BEGIN { print "Hello, world!" } \8xSfe
-yf8
"B{3q`(
BASIC Q'n+K5&p
传统版BASIC(例如GWBASIC): 23tX"e
_z#"BN
10 PRINT "Hello, world!" ~3.*b%,
20 END qKD
0''p29
或在提示符输入:
P\MDD@
Q` u#
?"Hello, world!":END "kP,v&n
a>OYJe
现代版BASIC(例如Quick BASIC): HS<Jp44
/Z6lnm7wJ
Print "Hello, world!" N)"8CvQL
[_JdV(]$
以下的语句在Quick BASIC中同样有效: AJ}FHym_ZQ
Ca'BE#q
? "Hello,world!" 44u)F@)
Yk|6?e{+)
+g
g_C'"
BCPL !CU-5bpu
GET "LIBHDR" DU\ytD`u
c0zcR)=mL
LET START () BE (c[u_~ ;
$( TX=894{nGh
WRITES ("Hello, world!*N") _p6r5Y
$) K? o p3}f?
|aP`hVm
;d}>8w&tfy
Befunge Z4i))%or
"!dlrow olleH">v x:Q\pZ
, !\7M7
^_@ ~6;I"0b5
F- -g?Q^
D>y5&`
Brainfuck @/^<9
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 8r(awp
+++++++++++++++.>.+++.------.--------.>+.>. \oWpyT _
`D(V_WZ
u:APGR^
C Zp7Pw
#include <stdio.h> ?XY'<