Array in mystack

i have write phase code to Mystack, but its error in declare dynamic array, can you help me, fix it? thanks

Code:

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#include "iostream"
using namespace std;
class MyStack{

        public:
                MyStack();
                ~MyStack();
                int Pop();
                void Push(int item);
                void IsFull();
                void IsEmpty();
        private:
                //int this->size=5;
                int *Arr=new Arr[5];
                int index=-1;

};
MyStack::MyStack();
MyStack::~MyStack(){
        delete(Arr);
}
int MyStack::Pop(){
        index=index -1;
        return Arr[index--];
}
void MyStack::Push(int item){
        Arr[index]=item;
        index++;
}
void MyStack::IsFull(){
        if((size-1)==index)
                cout<<" Stack is full";
}
void MyStack::IsEmpty(){
        if(index==-1)
                cout<<"Stack is Empty";
}

void main(){
        MyStack s;
       
        s.Push(6);
        s.Push(3);
        s.Push(2);
        s.Push(5);
        cout<<s.Pop();


       
}

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Is this:

Code:

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int *Arr=new Arr[5]

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supposed to be

Code:

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int *Arr=new int[5]

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?

thanks but have error
'MyStack::Arr' : only static const integral data members can be initialized

Well yes that's true too; I missed that. All these things are supposed to be done in the constructor, not the definition of the class.

thanks. i understood.

Code:

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MyStack::MyStack(){
  size =100;
  Arr= new int[size];
  index=0;
}

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