“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。 #6za
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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》。 -MItZ
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以下是用不同语言写成的Hello World程序的几个例子: "%)^:('Ki
Ada vDVE#Nm_
with Ada.Text_Io; use Ada.Text_Io; Ks.kn7<l
procedure Hello is LYp=o8JW|
begin "hXB_73)V
Put_Line ("Hello, world!"); ]`}R,'P
end Hello; 3QD##Wr^
j~`rc2n%
=@go;,"
汇编语言 ;T?4=15c
I~NQt^sg
x86 CPU,DOS,TASM 3&7$N#v
MODEL SMALL nnBl:p>< k
IDEAL 7V KTI:5y
STACK 100H Oz7WtN
H8?Kgaj~vf
DATASEG ccJ!N
HW DB 'Hello, world!$' y3pr(w9A
.RxAYf|
CODESEG Zn"1qLPF
MOV AX, @data \!,qXfTMB
MOV DS, AX 3NC-)S
MOV DX, OFFSET HW (f?&zQ!+
MOV AH, 09H L\y>WR%s
INT 21H 2?nhkast#=
MOV AX, 4C00H ;c;PNihg
INT 21H A+bU{oLr
END < e7
[";<YR7iRN
J;cTEB
x86 CPU,GNU/Linux,NASM V-%Am
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). gTwxmp.,
;Enter this into "hello.asm" then type: {h *Pkn1
;"nasm -f elf hello.asm" m\?H
<o0
;"ld hello.o -o hello" VJ$UpqVm
;"./hello" 7cMSJM(]G
PK|"+I0
section .data ;data section declaration Ae 3:"
msg db 'Hello World!',0AH 7!-y72qx
len equ $-msg ;string length J\x.:=V
WZJ}HHePr
section .text ;code section declaration I:G4i}mA
global _start ;entry point (start of execution) L/n?1'he
_start: mov edx,len ;string length 2q,> *B?
mov ecx,msg ;string start #iAEcC0k5
mov ebx,1 ;file handle: stdout Wf>scl`s
mov eax,4 ;sys_write JJ$q *
int 80h ;kernel system call 9Lv"|S`5W_
$C8nPl' 7
mov ebx,0 ;return value Wa+q[E
mov eax,1 ;sys_exit V_Oj?MMpn
int 80h ;kernel system call >g FEA0-
=g+Rk+ jn
"iY=1F"\R
x86 CPU,Windows,MASM32 .#ASo!O5q
.386 hIv8A_>@`
.model flat,stdcall I,d5Y3mC
option casemap:none V,qc[*_3
;Include 文件定义 mh=YrDU+L
include windows.inc 2RC|u?+@
include user32.inc 8RJ^e[?o(
includelib user32.lib NLA/XZ
include kernel32.inc W6 U**ir.
includelib kernel32.lib [:(^n0%
;数据段 _M;M-hk/
.data Uc?#E $X
szCaption db 'A MessageBox!',0 oWo/QNw9
szText db 'Hello,world!',0 &KS*rHgt?
;代码段 !+# pGSk
.code J"Z=`I)KON
start: b
qNM
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK rW(<[2 vg
invoke ExitProcess,NULL V O=
o)H\
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> rr=e
end start pZg}7F{$
-@EAL:kY
$'obj
AWK 1||\3L/
BEGIN { print "Hello, world!" } lmRdl>
wjeuZNYf
3EN(Pz L
BASIC chF@',9t
传统版BASIC(例如GWBASIC): IDIok~B=e
M'D l_dx-
10 PRINT "Hello, world!" "bC1dl<
20 END k6?;D_dm
[R~`6
或在提示符输入: M#7w54~b?M
m<X[s
?"Hello, world!":END ]F4.m
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p1B
现代版BASIC(例如Quick BASIC): /:OSql5K*<
Z.DO 2=+=
Print "Hello, world!" U$,W/G}m
Lm{qFu
以下的语句在Quick BASIC中同样有效: $)O=3dNbo
p2/Pj)2
? "Hello,world!" TC+L\7
ZcLW8L
-)p
S\$GC
BCPL rV0X*[]J>
GET "LIBHDR" L
H8iHB
;0c
-+,
LET START () BE 0<";9qN)6
$( (q]_&%yW
WRITES ("Hello, world!*N") |r%NMw #y
$) (Iz$_(
=h
Lw1~
/eO:1c
Befunge r$
8^K\oF
"!dlrow olleH">v !RD<"
, ^I CSs]}1
^_@ &x YO6_.
cfP9b8JG
QU;bDNq,c
Brainfuck qG<3H!Z!ky
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<< c&GVIrJ
+++++++++++++++.>.+++.------.--------.>+.>. [ <,i}z
+M=`3jioL
]9P2v X
C #@3&1}J/
#include <stdio.h> +\_c*'K>
6B=: P3Y
int main(void) h7"c_=w+
{ j*'+f~A
printf("Hello, world!\n"); p"UdD
return 0; H6t'V%Ys
} _* m<Z;Et
l3O!{&~K
{)?:d6"
C++ 9k.5'#
#include <iostream> };Oyv7D+b
z*FCd6X
int main() aJ/}ID
{ E;tEmGf6F
std::cout << "Hello, world!" << std::endl; y2{uEbA
return 0; y<5RV>"Vg
} $~+(si2
a-bj! Rs
Pb`Uxv
C++/CLI NZoNsNu*C.
int main() 6D&{+;
{ /f}!G
System::Console::WriteLine("Hello, world!"); je`Ysbe n
} JJZu%9~[
rLpfybu
NxW
Dw
C# (C Sharp) ki6Lt
class HelloWorldApp YEPQ/Pc
{ zo|
'
public static void Main() h4#y'E!,Z
{ kfV}ta'^S
System.Console.WriteLine("Hello, world!"); .<Rw16O
} qeUT]*
w
} QJ,[K_
5(=5GkE)>
9,wD
COBOL 4^Y{ BS fF
IDENTIFICATION DIVISION. 7M/v[dwL
PROGRAM-ID. HELLO-WORLD. m!K`?P]:N
M
'#a.z%
ENVIRONMENT DIVISION. T T@U_^o
_1,hO?TK
DATA DIVISION. +6`+Q2qi
fg)VO6Wo&
PROCEDURE DIVISION. ?:42jp3
DISPLAY "Hello, world!". T!7B0_
STOP RUN. `+m:@0&L
y '[VZ$^i
xwF mY'o
Common Lisp ve]hE}o/}
(format t "Hello world!~%") dfP4SJqq
@9tzk [
lQM&q
DOS批处理 :N^+!,i
@echo off zub"Ap3
echo "Hello, world!" @PT([1C
ZuFcJ?8i
:pfLa2f+
Eiffel ?Kt F!:_C
class HELLO_WORLD $ niG)@*
Kr5(fU
creation AP:Q]A6}
make (^NYC$ZxM=
feature SK*z4p
make is Fq$r>tmV
local GEK7q<
io:BASIC_IO rJ)j./c
do W#P`Y < u$
!!io @-ml=S7;Sz
io.put_string("%N Hello, world!") vSu
dT
end -- make KdBpfPny@
end -- class HELLO_WORLD >qz#&