help in inheritance classes

Hi i am creating a project that will be inherited a class point, squere and cube all together i did all this and it's in the zip file but i wonted to know what i am putting wrong in main and why when i run the project it gives me address of the memory

I really need help in the main

File is corrupted.

gg

here is again the file

Ok, so what do you need help on? It compiles and runs for me. What is working correctly?

gg

I know that after you run this program it compiles and it works but my question is why i am getting this in the ouptut

Squere s(via * pointPtr):0x0012FF64// Her i don't know why iam getting the address of memory

and aslo its sayis in the output
perimeter :6.98771e039 // what's wrong with this

//and i wonted to make sure if this is corret that what's also my question

thanks

A pointer is being printed because that is exactly what you are doing, for example:

Code:

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int n = 5;
int *p = &n;
...
cout << p << endl;  //prints the address of n
cout << *p << endl;  //prints "5"

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Your other problem is that you are trying to cast up inheritance that wasn't previously cast down, for example:

Code:

---

class base {};
class child : public base {};
...
child c;
base *pb = static_cast<base*>(&c);    //cast down, ok
child *pc = static_cast<child*>(pb);  //cast back up, ok since pb points to type child
...
base b;
pb = &b; //pb now points to type base
pc = static_cast<child*>(pb); //cast up, but pb currently points to type base - this is garbage, results undefined

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Once you undestand that, what is wrong with this?

Code:

---

pointPtr = &p;
squarePtr = static_cast<Square *>(pointPtr); //cast up!!!!

---

gg

Thanks a lot Codeplug
for explaining to me what was going on that code i am not using pointer at all now and it's working perfect

Quote:

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You are the Best Codeplug

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Quote:

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Originally posted by Codeplug

Code:

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child *pc = static_cast<child*>(pb);  //cast back up, ok since pb points to type child

---

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when casting up you should use dynamic_cast not static_cast