“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。 %d m-?`
QC0!p"
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》。 [pg}S#A
*U=]@I}J
以下是用不同语言写成的Hello World程序的几个例子: C#i UP|7hh
Ada H^~.mBP
n
with Ada.Text_Io; use Ada.Text_Io; -fgC"2H
procedure Hello is '
)-M\'S$E
begin pi5GxDA]
Put_Line ("Hello, world!"); ~AG$5!
end Hello; ]h!`IX
NQ|xM"MqD
z[#Fog
汇编语言 +'#oz+
S2C]?6cTq
x86 CPU,DOS,TASM p T[gdhc
MODEL SMALL K"<*a"1I
IDEAL JR9$.fGJ
STACK 100H )9=(|Lp
`@`1pOb
DATASEG RGD]8mw
HW DB 'Hello, world!$' 64j|}wJ$
hzY[
G:
CODESEG sk2%
MOV AX, @data Y'`"9Db
MOV DS, AX `nJu?5
MOV DX, OFFSET HW Y\+KoR';
MOV AH, 09H [m'CR 4(|
INT 21H oc{EuW{Ag
MOV AX, 4C00H [U\(G
INT 21H p"`%
END m@rSz
M R'o{?{e`
n&-496H
x86 CPU,GNU/Linux,NASM *~z#.63oZ
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). DB`QsiC)
;Enter this into "hello.asm" then type: zzZg$9PT[
;"nasm -f elf hello.asm" ]M,06P>?
;"ld hello.o -o hello" wk\L* \@Y}
;"./hello" XTqm]
kGN||h
section .data ;data section declaration pKJK9@Ad
msg db 'Hello World!',0AH LD (C\
len equ $-msg ;string length ,smF^l
Psa@@'w
section .text ;code section declaration )%Y
IGV;&
global _start ;entry point (start of execution) Di=9mHC
_start: mov edx,len ;string length beZ(o?uK
mov ecx,msg ;string start UQd6/mD`e
mov ebx,1 ;file handle: stdout O.k\]'
mov eax,4 ;sys_write q]<xMg#nu
int 80h ;kernel system call ,
fb(
WY
N
dR ]
mov ebx,0 ;return value %85Icg
mov eax,1 ;sys_exit W7UtA.2LT
int 80h ;kernel system call
FA>1x*;c
rOl6lQW
u/AT-er;
x86 CPU,Windows,MASM32 |V`S>m%N
.386 SFjU0*B$
.model flat,stdcall =^h~!ovj:
option casemap:none <%bw/
;Include 文件定义 _zC (J
include windows.inc 3@5p"X
include user32.inc j%& IL0
includelib user32.lib xRDiRj
include kernel32.inc &K:' #[3V
includelib kernel32.lib d*;$AYI#R
;数据段 fk5XvL
.data .
%(^mK)zQ
szCaption db 'A MessageBox!',0 <9@7,2
szText db 'Hello,world!',0
S2=%x.
;代码段 MV+i{]
.code 3;$bS<>
start: PDw{R]V+
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK BSXdvI1y
invoke ExitProcess,NULL ]1fZupM^6
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> "D> ]ES%5
end start ValS8V*N1
^Gz{6@TY5
&v#`t~
AWK )&Z>@S^
BEGIN { print "Hello, world!" } K&pM o.
rm+v(&
+cfziQ$'
BASIC ++92:decM
传统版BASIC(例如GWBASIC): Uh6mGLz*&
{y );vHf$
10 PRINT "Hello, world!" rveVCTbC
20 END L:U4N*
F+j O*F2h
或在提示符输入: fuSq ={]
0 K3Hf^>m
?"Hello, world!":END INLf# N
=g0*MZ;"
现代版BASIC(例如Quick BASIC): tSw>@FM
G.VYp6)5
Print "Hello, world!" rycJyiw<-
&X w`T9<
以下的语句在Quick BASIC中同样有效: %F$N#YG
J%r7<y\
? "Hello,world!" Pc4R!Tc
/"0as_L<
2oNV=b[
BCPL ec?1c&E
GET "LIBHDR" \|{*arS
7t4v~'h;5e
LET START () BE Z% Z"VoxH
$( ggCr-
WRITES ("Hello, world!*N") *98Ti|
$) di_gWE
j6X LyeG7
4]"w b5%
Befunge fu>Qi)@6a1
"!dlrow olleH">v <lx^aakk!
, X\G)81Q.S
^_@ wF;B@
U(A4v0T
XIN5a~[z*
Brainfuck LD@7(?mlU
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< 7ti<
+++++++++++++++.>.+++.------.--------.>+.>. CveWl$T12
/Hk07:"c
;E2kT
GT
C QJ M(UfHUD
#include <stdio.h> -y <