מונחה עצמים- תרגול 3 | c.ctors, const objects, composition vs. aggregation

7/30/2019 C.Ctors, Const Objects, Composition vs. Aggregation | - 3

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Ehmcit Ex`cgtcd Rxeoxnll`goT`xosj 9

Ijnyycy ielrey`tèg

Ierp Iegytxsitexy

Iegyt ehmcity

Ielrey`tèg qy' Nooxcontèg


2/38

=,X8'

'

=

8)8'&

)&:v*p7'

:v>*p>7

:v8*p87


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(%% j`gc>'f

) agdca UJ@GCU>UF

)dca`gc UJ@GCU>UF

)`gijsdc :èytxcnl7

sy`go gnlcyrnic ytd;

ijnyy J`gc> {

rx`qntc=

`gt lUv>*lUp>*lUv8*lUp8;

`gt lUiejex;

rshjì=

J`gc>&`gt i* `gt v>* `gt p>* `gt v8* `gt p8;

qe`d rx`gt&;

|;

)cgdà %% UJ@GCU>UF

%% j`gc>'irr

)`gijsdc (j`gc>'f(

J`gc>==J`gc>&`gt i* `gt v>* `gt p>* `gt v8* `gt p8 {

lUiejex;lUp>

;

lUv8 :: (7

:: ( :( :: lUv8 :: (*( :: lUp8 :: (7

:: cgdj;

|


4/38

==

'>)v>

&):v*p7&'8)/rx`gt&

'9)*

&'''4)`gt&'

,deshjc)

j`gc&


5/38

=Re`gt%% re`gt8'f

) agdca URE@GT8UF

)dca`gc URE@GT8UF

)`gijsdc :èytxcnl7


ijnyy Re`gt8 {

rx`qntc=

`gt lUv* lUp;

rshjì=Re`gt8&`gt v* `gt p;

qe`d rx`gt&;

|;

)cgdà %% URE@GT8UF

%% re`gt8'irr

)`gijsdc (re`gt8'f(

Re`gt8==Re`gt8&`gt v* `gt p {

lUv


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j`gc8%% j`gc8'f

)àgdca UJ@GCU8UF

)dca`gc UJ@GCU8UF

)`gijsdc (re`gt8'f(

)`gijsdc :èytxcnl7


ijnyy J`gc8 {

rx`qntc=

`gt lUiejex;

Re`gt8 lUr>* lUr8;

rshjì=

J`gc8&`gt i* `gt v>* `gt p>* `gt v8* `gt p8;

qe`d rx`gt&;

|;

)cgdà %% UJ@GCU8UF

%% j`gc8'irr

)`gijsdc (j`gc8'f(

J`gc8==J`gc8&`gt i* `gt v>* `gt p>* `gt v8* `gt p8 =

lUr>&v>*p>) * lUr8&v8*p8) {

lUiejex


7/38

,iegytxsitex==

J`gc8==J`gc8&`gt i* gt v>* `gt p>* `gt v8* `gt p8 = lUr>&v>*p> * lUr8&v8*p8

{

lUiejex,lUr8j`gc'& 'lUr>(lUr8)

dntn lclhcxyJ`gc8&

lUiejex)*',dcytxsitex=J`gc8*

lUr8,lUr>'


8/38

==

'>):v*p7&

'8)/rx`gt&

'9)*&''

'4)`gt,:deshjc&)&j`gc

=

'>Re`gt

J`gc*'


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=Re`gt8

%% j`gc9'irr)`gijsdc (j`gc9'f

qe`d J`gc9==Re`gt9==rx`gt& {iest :: ( :( :: lUv :: (*( :: lUp :: (7 Zg;

|

qe`d J`gc9==rx`gt& {

iest :: ( iejex'rx`gt&;

iest :: ( r8* lUr8;

rshj`i=

J`gc9&`gt i* `gt v>* `gt p>* `gt v8* `gt p8

= lUr>&v>*p> * lUr8&v8*p8 {

lUiejex < i;

|qe`d rx`gt&;

|;

)cgd`a %% UJ@GCU9UF


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==

Re`gt9J`gc9)

Re`gt9

J`gc9&


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)`gijsdc (j`gc9'f(`gt ln`g& {

J`gc9 j9&2*>*8*9*4;

j9'rx`gt&;

j9'r>'rx`gt&; %% CXXEX

Re`gt9 r9&>*8; %% CXXEX

r9'rx`gt&; %% CXXEX

xctsxg 2;|

Re`gt Iegytxsitex :>*87

Re`gt Iegytxsitex :9*47

J`gc Iegytxsitex*

iejex< :>*87*

r8< :9*47

iejex< :>*87 r8< :9*47

J`gc Dcytxsitex*

iejex< :>*87*

r8< :9*47

Re`gt Dcytxsitex :9*47

Re`gt Dcytxsitex :>*87


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Ierp Iegytxsitex


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%% Clrjepcc'irr

)`gijsdc (Clrjepcc'f

Clrjepcc==Clrjepcc& gt @D* iegyt ifnx -gnlc{%% Itex

iest :: (Iegytxsitex injjcd( :: cgdj;

lU@D < `@D;

lUgnlc < gcw ifnx [ytxjcg&gnlc +>\;

ytxirp&lUgnlc* gnlc;

Rx`gt&;

|

qe`d Clrjepcc==Rx`gt& { %% Rx`gt

iest :: (@D= ( :: lU@D :: (*Gnlc= :: lUgnlc

:: ( *Nddxcyy&re`gtcx=2v( :: fcv :: &`gt lUgnlc:: cgdj;

|Clrjepcc==Clrjepcc& {%% Dtex

iest :: (Dcytxsitex injjcd(::cgdj;

Rx`gt&;

dcjctc [\ lUgnlc;

lUgnlc


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Estrst=

Iegytxsitex injjcd

@D= 9*Gnlc=Leyf`ke *Nddxcyy&re`gtcx=2v619>42

Iegytxsitex injjcd

@D= 3*Gnlc=Pey`asg *Nddxcyy&re`gtcx=2v619864



Dcytxsitex injjcd


Dcytxsitex injjcd


`gt ln`g&

{Clrjepcc clr>&9* (Leyf`ke(;

Clrjepcc clr8&3* (Pey`asg(;

clr>'Rx`gt&;

clr8'Rx`gt&;

xctsxg 2;

|


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Estrst=

Iegytxsitex injjcd

@D= >*Gnlc=Cj` Xnifnl`l *Nddxcyy&re`gtcx)=2v619>04

`g LpAsgi

Dcytxsitex injjcd

@D= >*Gnlc=Cj` Xnifnl`l *Nddxcyy&re`gtcx)=2v619>04

@g tfc cgd ea ln`g

Dcytxsitex injjcd@D= >*Gnlc= *Nddxcyy&re`gtcx)=2v619>04

qe`d LpAsgi&Clrjepcc clr {

iest :: (`g LpAsgi Zg (;

|

`gt ln`g&

{Clrjepcc Egc&>*(Cj` Xnifnl`l(;

%% injj`go ierp iegytxsitex

LpAsgi&Egc;

iest:: (@g tfc cgd ea ln`g Zg;

%% Fcxc tfc rxeoxnl ixnyfcy.

xctsxg 2;

|


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%% Clrjepcc'irr

%% Ierp iegytxsitex

Clrjepcc==Clrjepcc&iegyt Clrjepcc ! Clr {

iest :: (Ierp Iegytxsitex injjcd( :: cgdj;

lU@D < Clr'lU@D;

lUgnlc


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Estrst=

Iegytxsitex injjcd

@D= >*Gnlc=Cj` Xnifnl`l *Nddxcyy&re`gtcx=2v619>42

Ierp Iegytxsitex injjcd

@D= >*Gnlc=Cj` Xnifnl`l *Nddxcyy&re`gtcx=2v619866

`g LpAsgi

Dcytxsitex injjcd

@D= >*Gnlc=Cj` Xnifnl`l *Nddxcyy&re`gtcx=2v619866

@g tfc cgd ea ln`g

Dcytxsitex injjcd

@D= >*Gnlc=Cj` Xnifnl`l *Nddxcyy&re`gtcx=2v619>42

qe`d LpAsgi&Clrjepcc clr {

iest :: (`g LpAsgi Zg (;

|

`gt ln`g&

{

Clrjepcc Egc&>*(Cj` Xnifnl`l(;

LpAsgi&Egc;

iest:: (@g tfc cgd ea ln`g Zg;

xctsxg 2;

|


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Ierp Iegytxsitex&I'Itex)

=

'>hp xcacxcgic)I'Itex)Dtex&&

'8,I'Itex,rx`qntc*'

*hp qnjsc'

*.

),I'Itex,rx`qntchpQnj

ijegc&


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%%Re`gt'f

)àgdca URE@GTU

)dca`gc URE@GTU

)`gijsdc :èytxcnl7


ijnyy Re`gt

{

rx`qntc=

`gt lU`V* lU`P;

rshjì=

Re`gt &`gt qnjV* `gt qnjP;

Re`gt &; %%dcytxsitex

qe`d Yfew &;

`gt OctV& { xctsxg lU`V; |

`gt OctP& { xctsxg lU`P; |

%%D`ytngic hctwccg 8 re`gty'

deshjc D`ytngic&Re`gt r>;

|;

)cgdà

%%Re`gt'irr

)`gijsdc (re`gt'f(

)`gijsdc :lntf'f7

%% Injisjntcy tfc d`ytngic hctwccg tfc

%% twe re`gty'

deshjc Re`gt==D`ytngic&Re`gt r> {

xctsxg &y~xt& rew&lU`V,r>'lU`V*8

+ rew&lU`P,r>'lU`P*8;

|

qe`d Re`gt==Yfew &{

iest::(v


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rshjì=

I`xijc&; %% Dcansjt iegytxsitex%% @g`t`j`}ntèg j`yt iegytxsitex

I`xijc&Re`gt IcgtcxRe`gt*`gt `Xnd`sy;

I`xijc& { %% Dcytxsitex

iest :: (i`xijc dcytxsitex(::cgdj;

Rx`gt&;|

Re`gt LeqcIcgtcx &iegyt Re`gt! GcwIcgtcx;

heej @y@gy`dc &iegyt Re`gt! Jeintèg ;

heej @yEqcxjnr &iegyt I`xijc! GcwI`xijc;

qe`d Rx`gt&;|;

)cgdà

%%I`xijc'f

)àgdca UI@XIJCU

)dca`gc UI@XIJCU

)`gijsdc (re`gt'f(

ijnyy I`xijc {

rx`qntc=

Re`gt lUIcgtcx;

`gt lU`Xnd`sy;


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%%I`xijc'irr

)`gijsdc (i`xijc'f(

)`gijsdc :lntf'f7

I`xijc==I`xijc& %% Dcansjt iegytxsitex

= lUIcgtcx&2*2* lU`Xnd`sy&> {

iest ::(I`xijc dcansjt iegytxsitexZg(;

Rx`gt&;

|

I`xijc==I`xijc&Re`gt icgtcxRe`gt* gt `Xnd`sy= lUIcgtcx&icgtcxRe`gt*

lU`Xnd`sy&`Xnd`sy {

iest :: (I`xijc `g`t j`yt iegytxsitexZg(;

Rx`gt&;

|Re`gt I`xijc==LeqcIcgtcx&iegyt Re`gt!

gcwIgtx {

Re`gt jnytIcgtcx


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Estrst=

&>) I`xijc dcansjt iegytxsitex

&8) icgtcx=v) 2

&>8) OeedHpc=v8 p8

&>9) OeedHpc=v8 p8

&>4) OeedHpc=v

&>1) OeedHpc=v6) icgtcx=v'@yEqcxjnr&i8::cgdj;

i8'LeqcIcgtcx&r8;

iest ::i>'@yEqcxjnr&i8::cgdj;

|


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iegyt


25/38

iegyt=iegyt'

=rx`qntc=

iegyt `gt lUv* lUp;

rshj`i=

Re`gt&`gt v* `gt p {

lUv


26/38

iegyt=,iegytxsitexiegyt

,iegytxsitex=

ijnyy Re`gt {

rx`qntc=

iegyt `gt lUv* lUp;rshj`i=

Re`gt&`gt v* `gt p = lUv&v* lUp&p { |

|;


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Iegyt Lclhcx Qnx`nhjcy ! Asgit`egy

,iegyt

*=

/)rx`gt&iegyt

iegyt*,iegyt `gytngic*

'


28/38

%% A`jc= Ytx`go'f

ijnyy Ytx`go

{

rx`qntc=

ifnx- lUrYtx;

`gt lU`Jcgotf;

rshjì=

Ytx`go&iegyt ifnx-;

ifnx- OctYtx&;

qe`d Xcqcxyc&;

%% xctsxgy tfc rey`tèg ea tfc ifnx

%% ex ,> à get aesgd`gt A`gd&ifnx iegyt;

|;

%% A`jc= Ytx`go'irr

Ytx`go==Ytx`go&iegyt ifnx- ytx {lU`Jcgotf < ytxjcg&ytx;

lUrYtx < gcw ifnx[lU`Jcgotf+>\;

ytxirp&lUrYtx*ytx;

|

`gt Ytx`go==A`gd&ifnx teUa`gd iegyt{ |

ifnx- Ytx`go==OctYtx& { xctsxg lUrYtx; |

qe`d Ytx`go==Xcqcxyc&) { |

qe`d Rx`gtQnxGnlc&Ytx`go ! qnxUytx

{ |

%% A`jc= ln`g'irr

qe`d ln`g& {

Ytx`go qnxUgnlc&(lUyGnlc(;

Rx`gtQnxGnlc&qnxUgnlc;

|


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/Rx`gtQnxGnlc'=

qe`d Rx`gtQnxGnlc&iegyt Ytx`go ! qnxUytx) {|'=

qe`d Rx`gtQnxGnlc&iegyt Ytx`go ! qnxUytx {

qnxUytx'OctYtx&;

|

=,iegyt


30/38

%% A`jc= Ytx`go'f

ijnyy Ytx`go

{

rx`qntc=

ifnx -lUrYtx;

`gt lU`Jcgotf;

rshjì=

Ytx`go&iegyt ifnx-;

iegyt ifnx- OctYtx& iegyt;

ifnx ercxntex[\ &`gt iegyt;

ifnx! ercxntex[\ &`gt;qe`d Xcqcxyc&;

%% xctsxgy tfc rey`tèg ea tfc ifnx

%% ex ,> à get aesgd

`gt A`gd&ifnx iegyt;

|;

%% A`jc= Ytx go'irr

iegyt ifnx- Ytx`go==OctYtx& iegyt{ xctsxg lUrYtx; |

ifnx Ytx`go==ercxntex[\ &`gt rey iegyt{ |

ifnx! Ytx`go==ercxntex[\ &`gt rey) { |

qe`d Rx`gtQnxGnlc&iegyt Ytx`go! q iegyt

{

q'OctYtx&; %% gew `t `y EK

|

%% A`jc= ln`g'irrqe`d ln`g& {

Ytx`go qnxUgnlc&(lUyGnlc(;

Rx`gtQnxGnlc&qnxUgnlc;

|


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Tclrexnxp Ehmcity

qe`d Rx`gtQnxGnlc&iegyt Ytx`go ! q {

'''

|

qe`d Rx`gtQnxGnlc&Ytx`go q {

'''

|

qe`d Rx`gtQnxGnlc&Ytx`go ! q {

'''

|'iegyt Ytx`go'

=iegyt Ytx`go

,Ytx`go!

=Rx`gtQnxGnlc&(lUyGnlc(

=iegyt Ytx`go'

/Rx`gtQnxGnlc

'hp qnjsc'

I'Itex


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Iegyt Ehmcit Re`gtcx%% Clrjepcc'f

ijnyy Clrjepcc

{

rx`qntc=

Ytx`go lUyGnlc;iegyt Ytx`go -lUrHeyyGnlc;

rshj`i=

Clrjepcc&iegyt Ytx`go !gnlc*

iegyt Ytx`go -rHeyygnlc;qe`d Asgi&;

|;

%% Clrjepcc'irr

Clrjepcc==Clrjepcc&iegyt Ytx`go!

gnlc* iegyt Ytx`go- rHeyyGnlc

= lUyGnlc&gnlc {

lUrHeyyGnlc < rHeyyGnlc;|

qe`d Clrjepcc==Asgi&

{

%% '''lUrHeyyGnlc,7xcqcxyc&;

|=

iegyt&

xcqcxyc*iegyt

),iegyt


33/38



34/38


Ielrey`t`eg=wfcg egc ea tfc

ijnyy/y qnx`nhjc `y ng

ehmcit

ijnyy H {''''|;

ijnyy N {rx`qntc=

H h;

%%'''''

|;

Nooxcont`eg=wfcg egc ea tfc ijnyy/y

qnx`nhjc `y n re`gtcx te

ng ehmcit'

ijnyy H {''''|;

ijnyy N8 {rx`qntc=

H- h;

%%'''''

|;


35/38

Ielrey`t`eg=

'>HN'

'8)=&

H)&'9

)dcjctc&''

'4=,ielrey`t`egH

)*

&

ijnyy H {''''|;ijnyy N {

rx`qntc=

H h;%%'''''

|;


36/38

Ielrey`tèg3')=&lclexp

dcaxnolcgtntègdpgnlìnjjeintèg,fcnr'

*

((,fcnr),d`yk dcaxnolcgtntèg'&

1')=&ielrey`tèg

)&*8,re`gtcx',

rnoc ansjt'


rx`qntc=

H h;%%'''''

|;


37/38

Nooxcont`eg =

'>HN )'&=H

)**/&*

,)*

/*N&

'8)=&cvicrt`egH)

iegytxsitex

N&


rx`qntc=

H- h;%%'''''

|;


38/38

Nooxcont`eg 9')=&H)`gtcxanic&*

'(

`gtcxanic'


rx`qntc=

H- h;%%'''''

|;

מונחה עצמים- תרגול 3 | c.ctors, const objects, composition vs. aggregation

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