Hello:
I am trying to create a class and then to add the objects in a
TSortedList. My class is:
*************************************
class MyClass : public TObject {
private:
Int_t i;
public:
MyClass(int x = 0) : i(x) {}
~MyClass(){}
void Set(int x) { i=x; }
Int_t Get() const { return i;}
Bool_t IsEqual (TObject *obj) const
{
return i == ((MyClass*)obj)->i;
}
Int_t Compare(TObject *obj) const
{
if ( i < ((MyClass*)obj)->i ) return -1;
if ( i == ((MyClass*)obj)->i ) return 0;
if ( i > ((MyClass*)obj)->i ) return 1;
}
Bool_t IsSortable() const { return kTRUE; }
ULong_t Hash() const { return i; }
ClassDef(MyClass,1);
};
*************************************
My code is:
TSortedList *list = new TSortedList;
MyClass *obj1 = new MyClass(4);
MyClass *obj2 = new MyClass(2);
MyClass *obj3 = new MyClass(6);
list->Add(obj1);
list->Add(obj2);
list->Add(obj3);
for ( Int_t i=0; i<3; i++) {
cout << ( (MyClass *)list->At(i) )->Get() << endl;
}
*************************************
When I compile the program, ROOT returns:
/root/include/TObject.h:110: warning: `virtual Int_t
TObject::Compare(const TObject*) const' was hidden
MyClass.p.h:14: warning: by `
Int_t MyClass::Compare(TObject*) const'
/root/include/TObject.h:136: warning: `virtual Bool_t
TObject::IsEqual(const TObject*) const' was hidden
MyClass.h:10: warning: by `
Bool_t MyClass::IsEqual(TObject*) const'
And when I execute the code, I obtain:
Warning in <MyClass::Compare>: this method must be overridden!
Warning in <MyClass::Compare>: this method must be overridden!
Warning in <MyClass::Compare>: this method must be overridden!
4
2
6
But I expected
2
4
6
What am I doing incorrectly?
What must I do to obtain 2 4 6?
Thank you very much in advance for your help.
Best regards. Jose.
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