Thread: Arraylist methods

I have class arraylist with all basic procedures (checkIndex, get, insert, erase nad output).
In private or protected part i have:

Code:

T* element  //1D field that contains elements of list
int arrayLength  //size of field
int listSize  //number of elements in list

I have to add two methods in class:

• arrayList<T>::removeRange ( remove elements on given interval. Interval has to be passed with inital and final index)
  Example: x=[1,2,3,4,5] //list
  x.removeRange(1,3) //call method
  x=[1,5] //result
  
• arrayList<T>::swap(i,j)
  (replace elements on indexes i and j)
  Example: x=[1,2,3,4,5] //list
  x.swap(1,3) //call method
  x=[1,4,3,2,5] //result

I try to add those two methods but without success
I don't know what to write in parenthesises beside method, which two variables should I use? Can I just come up with new two of them or have I use already existent?


I also attached how i try to write one method. I don't know if this is right type of thinking or should i think in different way.
Every opinion and help is more than wellcome