“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。 wqDf\k}'v
L;:PeYPL
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》。 @xdtl{5G
+!u9_?Tp
以下是用不同语言写成的Hello World程序的几个例子: JvXuN~fI{[
Ada poafGoH-Y
with Ada.Text_Io; use Ada.Text_Io; E'{:HX
procedure Hello is @lDnD%vZ`
begin n>u_>2Ikkj
Put_Line ("Hello, world!"); <!m.+
end Hello; ]vf_4QW=
p+iNi4y@
9`92
>
汇编语言 EgG3XhfS
00;SK!+$
x86 CPU,DOS,TASM _"p(/H
MODEL SMALL q(~jP0pj%
IDEAL } OIe!
STACK 100H ?cWwt~N9
:7X4VHw/
DATASEG ;L fn&2G
HW DB 'Hello, world!$' l7T?Yx j
SVVE b6&
CODESEG $A~aNI
MOV AX, @data ILDO/>n
MOV DS, AX xT&/xZLT
MOV DX, OFFSET HW A\S=>[ar-
MOV AH, 09H rOLZiE T
INT 21H vW.f`J,\D'
MOV AX, 4C00H 40=u/\/K
INT 21H 4PD5i
END 3.dSS
w|G7h=
fPTLPcPP
x86 CPU,GNU/Linux,NASM ih)\P0wed
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). >{Ayzz>v
;Enter this into "hello.asm" then type: 3 8&K"
;"nasm -f elf hello.asm" #7 H0I8
;"ld hello.o -o hello" }0<2n~3P
;"./hello" pWE(?d_M{G
{w3<dfJ
section .data ;data section declaration pFd{Tdh
msg db 'Hello World!',0AH kJB:=iq/x$
len equ $-msg ;string length .7
j#F
el$@^Wy&$
section .text ;code section declaration ZL0Vx6Ph
global _start ;entry point (start of execution) 38-kl,Vw
_start: mov edx,len ;string length O D5qPovsd
mov ecx,msg ;string start zK~_e\m
mov ebx,1 ;file handle: stdout umuj>
mov eax,4 ;sys_write 9+*{3 t
int 80h ;kernel system call Heqr1btK
gcwJ{&
mov ebx,0 ;return value Y/UvNb<lK
mov eax,1 ;sys_exit ._p2"<
int 80h ;kernel system call < (9
BO &
%ho?KU2j
LR.]&(kyd
x86 CPU,Windows,MASM32 ghW`xm87
.386 _)pOkS
.model flat,stdcall *eXs7 "H
option casemap:none |#t^D.j
;Include 文件定义 !ck luj
include windows.inc IX
6 jb"
include user32.inc U43U2/^
includelib user32.lib t^Bs3;E^
include kernel32.inc {TJ"O
includelib kernel32.lib TPx0LDk%(
;数据段 !b0A%1W;
.data yo_zc<
szCaption db 'A MessageBox!',0 J s33S)
szText db 'Hello,world!',0 i0\]^F
;代码段 rvhMu}.
.code GZ5 DI+3
start: 4VF]tX?o
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK ci?\W6
invoke ExitProcess,NULL mK7SEH;
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> qldm"Ul
end start PU\xF t
3r^||(_u
'"%hX&]5
AWK =saRh)EM
BEGIN { print "Hello, world!" } fZap\
=j w?*
zvnd@y{[
BASIC +`S_Gy
传统版BASIC(例如GWBASIC): evE:FiDm(j
DV?c%z`YO
10 PRINT "Hello, world!" LD WYFOGQ
20 END w"kBAi&
Sh5m+>7K
或在提示符输入: VtN@B*
eGKvzu
?"Hello, world!":END H_8PK$c;
WuWOC6^
现代版BASIC(例如Quick BASIC): xG4 C 6s
2GigeN|1N
Print "Hello, world!" x^`P[>
C.u)2[(
以下的语句在Quick BASIC中同样有效: Tsu\4
cL]
p+nB@fN/
? "Hello,world!" ae0Mf0<#)
R-iWbLD
SdI>
BCPL jv29,46K
GET "LIBHDR" B&!>& Rbx
~t*_
LET START () BE _Nz?fJ:$@
$( Z~w?Qm:/
WRITES ("Hello, world!*N") `]6W*^'PD
$) #Ph8?
?`
ebi|6
"_rpErm
}
Befunge ^Kl<<pUaV
"!dlrow olleH">v yJ; ;&
, 9QF,ynE
^_@ s}gdi
HN;f~EQT
+4IaX1.
Brainfuck gi_f8RP=2a
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< H%>cpwa[7
+++++++++++++++.>.+++.------.--------.>+.>. nH?#_ 5F1
9,>c;7s X
{9F}2
SJ
C .`D$.|!8g
#include <stdio.h> 7O=7lQ
6h[fk.W_
int main(void) :Ef$[_S>
{ DoeE=X*`k
printf("Hello, world!\n"); <c(%xh46
return 0; 1X&scVw
} maQDD*
rc{F17~vX
oB!-JX9
C++ bM
W}.v!
#include <iostream> ,0,&
L
?[5_/0L,=
int main() 4kNSF
{ ^!(tc=sr
std::cout << "Hello, world!" << std::endl; Q;z'"P
return 0; !r*JGv=
} L_zB/(h
.,p@ee$q
'A/{7*,
C++/CLI *ES"^N/88
int main() >o"0QD
{ Jj1lAg0
System::Console::WriteLine("Hello, world!"); S:
g 2V
} &:C(,`~
h&Q-QU
srU*1jD)
C# (C Sharp) ,UT :wpc^i
class HelloWorldApp ~05(92bK
{ &xFs0Ri(
public static void Main()
OBM&N
{ 8;,(D#p
System.Console.WriteLine("Hello, world!"); `C*psS
} b~rlh=(o#_
} Eo<N
p!LaR.8]
u&Xn#fh
COBOL v`"BXSmp{
IDENTIFICATION DIVISION. u9}LvQh_6,
PROGRAM-ID. HELLO-WORLD. <qx qlEQT
s(Fxi|v;
ENVIRONMENT DIVISION. S#ud<=@!9
2cJ3b
0Xx
DATA DIVISION. N!af1zj
iS8yJRy
PROCEDURE DIVISION. ?trqe/
DISPLAY "Hello, world!". 2C&l\16
STOP RUN. o2riy'~
3q (]Dg;v
z
2Ao6*%
Common Lisp /5R?(-
(format t "Hello world!~%") c~Z\|Y`#B
IqjH
G]>P!]
DOS批处理 Jy#21
@echo off NK(; -~{P
echo "Hello, world!" X&