Thread: My coding idea about inheritance for phones

well here i am just starting to do some coding about handphone to smartphone object..it's an inheritance project but not mine..
so i would like to share here about the errors and others.
any help is appreciated...
now my uml diagram i want to transfer to handwritten coding.so..

Handphone
-phoneNumber:string
-message: string
-credit:double
-sms_rate:double
-inbox:string[N*]
-object_counter:int
+<<constructor>> Handphone(no:string, cr:double, rate:double)
+smsEdit():void
+smsRead():void
+operator>>(recipient:Handphone&):void
+getCredit():double
+getObjCounter():int
+operator+(topUp:double): Handphone



Smartphone
-mms_message:image
-mms_inbox:image[N]
+operator>>(:Smartphone):void
+mmsRead():void
+mmsEdit():void
Fig. 2 Detail UML diagrams

here's my work...any comments ideas or something..i think it's ok..

Code:

class Handphone
{
private:

string phoneNumber;
string message;

double credit;

string inbox[N*];

int object_counter;



public:

Handphone ( string no, double cr,double rate)

void smsEdit();

void smsRead();


}


Class Smartphone : public Handphone
{
private:

image mms_message;
image mms_inbox[N];
public:

void operator>>(Smartphone &s);

void mmsRead();

void mmsEdit();





}

can anyone explain what is string[N*] inbox; and image[N] mms_inbox;
what is the data type like?? why does it have a bracket?like[*] and [] the initial i suppose it's a pointer thing.