“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。 {E; bT|3z
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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》。 KomMzG:
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以下是用不同语言写成的Hello World程序的几个例子: fat;5XL@
Ada 3eg6 CdT
with Ada.Text_Io; use Ada.Text_Io; ^T:L6:
procedure Hello is E!'6vDVC:
begin AsD$M*It
Put_Line ("Hello, world!"); Ur]/kij
end Hello; o%bf7)~s
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汇编语言 $xT9e
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x86 CPU,DOS,TASM SJ91(K
MODEL SMALL Q^;:Kl.b
IDEAL ua"2nVxK_K
STACK 100H /GVjesN
?&'Kw>s@
DATASEG O\CnKNk,
HW DB 'Hello, world!$' Y[l<fbh(}
p}3` "L=
CODESEG ue^HhZ9
MOV AX, @data GE`1j'^-
MOV DS, AX N]eBmv$|
MOV DX, OFFSET HW 3&>0'h
MOV AH, 09H Y)@Y$_
INT 21H EK=
y!>
MOV AX, 4C00H [UXN=
76N
INT 21H NRny]!
END xP_/5N=f
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x86 CPU,GNU/Linux,NASM ,]:Gn5~
;"Hello World" for Linux on Intel 80x86 using nasm (Intel syntax). :hT.L3n,
;Enter this into "hello.asm" then type: e!PB3I
;"nasm -f elf hello.asm" %ufh
;"ld hello.o -o hello" !zvjgDlZv
;"./hello" PtYG%/s
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section .data ;data section declaration 6I: 6+n
msg db 'Hello World!',0AH ,jEc4ih4
len equ $-msg ;string length O/|))H?C
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section .text ;code section declaration 7O'.KoMw
global _start ;entry point (start of execution) Q-<Qm ?
_start: mov edx,len ;string length Ml$<x"Q
mov ecx,msg ;string start 7nNNc[d*=
mov ebx,1 ;file handle: stdout CIz0Gjtx6m
mov eax,4 ;sys_write e
pp04~
int 80h ;kernel system call 7*j!ZUzp
F)KR8(
mov ebx,0 ;return value 9Vqy<7i1
mov eax,1 ;sys_exit qEuO@oE
int 80h ;kernel system call &e6UEG
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od{\z
x86 CPU,Windows,MASM32 4d%0a%Z
.386 q8&l%-d`
.model flat,stdcall %59uR}\
option casemap:none 'B{FRK
;Include 文件定义 3:MJKS02OD
include windows.inc A+!,{G
include user32.inc WPkKbF
includelib user32.lib `<yQ`Y_X
include kernel32.inc I ^m
includelib kernel32.lib L-}J=n\
;数据段 5wmd[YL
.data ~5`oNa
szCaption db 'A MessageBox!',0 Yb-{+H8{J
szText db 'Hello,world!',0 zPND$3&'
;代码段 SOq:!Qt
.code b~}$Ch3ymW
start: |4g0@}nr+W
invoke MessageBox,NULL,offset szText,offset szCaption,MB_OK $:%E<j4Dn
invoke ExitProcess,NULL }04mJY[
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> JLnv O
end start w8>h6x"
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:^WF%X
AWK G~o!u8^;
BEGIN { print "Hello, world!" } 5LB{b]w7m
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BASIC C<AW)|r_
传统版BASIC(例如GWBASIC): &n
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?*yyne
10 PRINT "Hello, world!" n
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20 END #kASy 2t
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或在提示符输入: @U18Dj[
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?"Hello, world!":END BH1h2OEe#
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现代版BASIC(例如Quick BASIC): !}z'"l4i
Ac|\~w[\
Print "Hello, world!" iW^J>aKy
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以下的语句在Quick BASIC中同样有效: R__:~uv,
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? "Hello,world!" UPU$SZAIx
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BCPL IO)#O<
GET "LIBHDR" m9oOH5@K~
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LET START () BE @2/|rq
$( OIL8'xY.w
WRITES ("Hello, world!*N") 3}<U'%sd
$) zk
FX[-'O
N=BG0t$
bO2?DszT5
Befunge *$ g!/,
"!dlrow olleH">v Z;Hkx1
, M/quswn1
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Brainfuck )Q'E^[Ua
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+++++++++++++++.>.+++.------.--------.>+.>. zo(#tQ-'m
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