“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。 C>T6{$xkC
h@{@OAu?
将Hello World程序作为第一个学写的程序,现在已经成为一种传统。该程序最早出现在由Brian Kernighan和Dennis Ritchie写的计算机程序设计教程《C语言程序设计》。 a.%]5%O;t
}Q\yem
以下是用不同语言写成的Hello World程序的几个例子: WCR+ZXI?1
Ada ;Jx ^
with Ada.Text_Io; use Ada.Text_Io; OR?8F5o?p
procedure Hello is c}QQ8'_
begin *\S>dhJ4
Put_Line ("Hello, world!"); {/QpEd>3+
end Hello; t&eD;lg :
Q96g7[
zN2sipJS8
汇编语言 )B}]0`z:P
B@iIj<p~
x86 CPU,DOS,TASM #y>oCB`EM
MODEL SMALL cgz'6q'T
IDEAL A]H+rxg
STACK 100H ^<y$+HcH
'O{hr0q}
DATASEG Jc:G7}j6
HW DB 'Hello, world!$' PU-~7h+$
/)oxuk&}c
CODESEG DU 8)c$
MOV AX, @data (/@o7&>*50
MOV DS, AX +S/8{2%?DG
MOV DX, OFFSET HW ?7G[`@^Y
MOV AH, 09H p%3';7W\
INT 21H #(
kT
MOV AX, 4C00H _I$]L8hC
INT 21H <7PtC,74
END *Gu=O|Mm
l@j!j]nE
:-6_X<
x86 CPU,GNU/Linux,NASM @F3 d9t-
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). .S?,%4v%%
;Enter this into "hello.asm" then type: |?g2k:fzB7
;"nasm -f elf hello.asm" mY`b|cS3p$
;"ld hello.o -o hello" W]M[5p]*
;"./hello" N#[/h96F
$7BD~U
section .data ;data section declaration k?S-peyRO
msg db 'Hello World!',0AH )3G?5
OTS
len equ $-msg ;string length u[dI81`
VKR6 i
section .text ;code section declaration u"|.]r
global _start ;entry point (start of execution) koqH~>ZtD
_start: mov edx,len ;string length 2l\Oufer"
mov ecx,msg ;string start S:1! )7
mov ebx,1 ;file handle: stdout ,9A[o`b
mov eax,4 ;sys_write .S5&MNE
int 80h ;kernel system call ko,
u
v
WhtClJ3
mov ebx,0 ;return value D~mGv1t"
mov eax,1 ;sys_exit w^ DAu1
int 80h ;kernel system call :$}67b)MO
x1Si&0T0P<
]h|GaHiE
x86 CPU,Windows,MASM32 =3(
ZUV X
.386 [n:R]|^a
.model flat,stdcall E3gQ`+wNg?
option casemap:none wwpvmb
;Include 文件定义 Q0 ^?jh
include windows.inc pkxW19h*0
include user32.inc #D>8\#53V/
includelib user32.lib 90ORx\Oeo
include kernel32.inc 4Yn*q~f
includelib kernel32.lib h[lh01z
;数据段 N86Hn]#
.data 5 TnECk
szCaption db 'A MessageBox!',0 #v~5f;[AAs
szText db 'Hello,world!',0 ^T<<F}@q
;代码段 #K4wO!d
.code 6'Lij&,f?{
start: 3gGF?0o
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK Fe/*U4xU
invoke ExitProcess,NULL FJ2^0s/"
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Ybok[5
end start 6~2!ZU
ml3]CcKn
H7\EvIM=
AWK 9wI1/>
BEGIN { print "Hello, world!" } RWoa'lnu
=nY*,Xu<
@0)bY*njj
BASIC 2smLv1w@
传统版BASIC(例如GWBASIC): 7,(:vjIXd
].Et&v
10 PRINT "Hello, world!" \?GMtM,
20 END zb9$
7%?A0%>6G
或在提示符输入: R"82=">v
RQh4RUm
?"Hello, world!":END icnp^2P
A46y?"]/30
现代版BASIC(例如Quick BASIC): k|g~xmI;
Tlf G"HzZ%
Print "Hello, world!" R_Z
H+@O
N}^\$sVu_
以下的语句在Quick BASIC中同样有效: G,$jU9 f
C"YM"9JSJ
? "Hello,world!" .IG(Y!cB
"4ovMan
?5+=
BCPL J[<:-$E
GET "LIBHDR" \Mi y+<8$
gN(8T_r
LET START () BE K\;b3
$( eR;cl$
WRITES ("Hello, world!*N") RE*SdazY?
$) /gPn2e;
3
D+dM0wM
jLZ~9FXF2
Befunge \a}%/_M\
"!dlrow olleH">v ^(a %B
, 0P!6
.-XU
^_@ QRa>W/N
!qy/'v4
q5QYp
Brainfuck N.3M~0M*
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< }9@,EEhg
+++++++++++++++.>.+++.------.--------.>+.>. }t]CDa_n
s K s
D
)TV'eq
C QDyL0l{C
#include <stdio.h> nC2A&n