“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。 18F7;d N8
|Kb-oM&^#
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》。 I"r*p?
uA,K}sNRZ
以下是用不同语言写成的Hello World程序的几个例子: dqcfs/XhP
Ada s@0#w*N
with Ada.Text_Io; use Ada.Text_Io; r6"t`M
procedure Hello is [gU z9iU
begin EyozhIV
Put_Line ("Hello, world!"); i: 1V\q%
end Hello; Tf` ~=fg%
o[_{\
?!b}Ir<1j
汇编语言 UL(#B TK
$6R<)]6
x86 CPU,DOS,TASM |NL$? %I
MODEL SMALL ^ygN/a>rr
IDEAL eQA89 :j,
STACK 100H xCGvLvFn
k}~|jLu@g
DATASEG f ~9ADb
HW DB 'Hello, world!$' 7R ;!
Wo\NX05-?
CODESEG (C1]R41'
MOV AX, @data D[ny%9 :
MOV DS, AX 5ZUqCl(PX)
MOV DX, OFFSET HW 8
"|')f#
MOV AH, 09H dnH?@K
INT 21H .Q4EmpByCg
MOV AX, 4C00H jf@#&%AC9
INT 21H FK0nQ{uB"
END RaKL KZn
ob-y {x,R
Q@nxGm
x86 CPU,GNU/Linux,NASM 1jO/"d.8n
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). Za5*HCo
;Enter this into "hello.asm" then type: 7\<#z|
;"nasm -f elf hello.asm" c)+IX;q-C
;"ld hello.o -o hello" 0Kq\ oMn
;"./hello" T-uI CMEf
5_#wOz0u$
section .data ;data section declaration Y ~xcJH
msg db 'Hello World!',0AH c=h{^![$
len equ $-msg ;string length %\2
ll=p1
)FYz*:f>&
section .text ;code section declaration NbSkauF~b
global _start ;entry point (start of execution) X^7bOFWE
_start: mov edx,len ;string length zq8LQ4@ay
mov ecx,msg ;string start [*Wq6n
mov ebx,1 ;file handle: stdout C([TolZ
mov eax,4 ;sys_write >^{}Hjt
int 80h ;kernel system call $s5LzJn
V_$ BZm%8J
mov ebx,0 ;return value L6O*aZ|
mov eax,1 ;sys_exit 5fjmr
int 80h ;kernel system call Yc&yv
9ssTG4Sa
">j}!n
8J
x86 CPU,Windows,MASM32 <%Bsb}h,
.386 9Y3_.qa(.
.model flat,stdcall c\065#f!
option casemap:none >iDV8y
;Include 文件定义 UzWf_r
include windows.inc Tm
6<^5t
include user32.inc S)T~vK(n
includelib user32.lib iG!tRNQ{y
include kernel32.inc Dqs{n?@n
includelib kernel32.lib $_onSYWr
;数据段 ~K 5eO-
.data X3P~z8_
szCaption db 'A MessageBox!',0 1.6yi];6
szText db 'Hello,world!',0 WnyEdYA
;代码段 RQ;pAO
.code KC[ql}JP
start: D37N*9}
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK f![?og)I%
invoke ExitProcess,NULL sB"Oi|#lk
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 7jQOwzj
end start *VG#SK
40w,:$
N7v7b<6
AWK Tu"bbc
BEGIN { print "Hello, world!" } bH% k)
b3N1SC:Wn
SxI='z_S.f
BASIC _Ryt|# y
传统版BASIC(例如GWBASIC): c|.~f+
-~n^?0
10 PRINT "Hello, world!" *<c, x8\s9
20 END 0Ihp`QGU:
D2z" Z@
或在提示符输入: 2~h! ouleY
ry)g<OA
?"Hello, world!":END >4
4A
N_Q)AXr)
现代版BASIC(例如Quick BASIC): P:,'
>\6Tm
Print "Hello, world!" P/6$T2k_
j")#"& m
以下的语句在Quick BASIC中同样有效: I]+xerVd
Wn6~x2 LaV
? "Hello,world!" aDceOhfx
6O"?wN%$
|Ii[WfFA|J
BCPL Aru=f~!
GET "LIBHDR" FOV%\=Hl
v'na{"
LET START () BE $a.fQ<,\X
$( k<(G)7'gm
WRITES ("Hello, world!*N") HI&N&a9C
$) xMsSZ{j%5
.$&mWytw=
=;Ap+}
Befunge gT8Q:8f:
"!dlrow olleH">v z=%&?V
, :59fb"^$
^_@ ;\-f7!s
OCHjQc
Lu?MRF
f
Brainfuck G%5bQ|O
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< Qf|x]x*5
+++++++++++++++.>.+++.------.--------.>+.>. !8YZ;l
k@:M#?(F
Bu_/yKW
C y.vYT{^
#include <stdio.h> M~/7thP{
R<(kiD\?]
int main(void) {;mT.[
{ t7#lRp&
printf("Hello, world!\n"); r'*x><m'
return 0; 3kqO5+,C
} KTLq~Ru
fz>3
VS`
tj
C++ E&>3 {uZI
#include <iostream> ]6s7?07m4
8.JFQ/)i
int main() $[(amj-;l
{ 'C[{cr.`
std::cout << "Hello, world!" << std::endl; eV(nexE
return 0; J34/rL/s
} 3QSA|
,jH<i.2R
3T1t !q4/5
C++/CLI m{#?fR=9
int main() 0SS,fs<w3
{ J n>3c
System::Console::WriteLine("Hello, world!"); P'}WmE'B}F
} 2:[
-
J:D{5sE<|
[7Fx#o=da
C# (C Sharp) r{LrQ
class HelloWorldApp }`fFzb
{ ?`T0zpC
public static void Main() |)5xm N]
{ Z01BzIsR
System.Console.WriteLine("Hello, world!"); S2+X/YeB
} ke\gzP/
} n1XJuc~
mH`K~8pRg
l 7T@<V
COBOL j(xVbUa
IDENTIFICATION DIVISION. Budo9z_w
PROGRAM-ID. HELLO-WORLD. I}^Q u0ub
r ,cz
yE/
ENVIRONMENT DIVISION. `|uwR5
;D8175px;
DATA DIVISION. &[yW}uV<7
vM3 b\yp
PROCEDURE DIVISION. zjE|UK{
DISPLAY "Hello, world!". v79k{<Ln
STOP RUN. S[zETRSG
<ztcCRov
\|@u)n_
Common Lisp _s{;9&qX]
(format t "Hello world!~%") WMi$ATq
>PbB /->
'v^Zterr
DOS批处理 dgEH]9j&
@echo off iVaCX Xf '
echo "Hello, world!" [[XbKg`"?
6 Mc&gnN
57|RE5]|!
Eiffel OK] _.v}
class HELLO_WORLD kO3N.t@n
6lAHB*`
creation !+EE*-c1c
make l/i7<