Working example of constructor class with dynamic array

#include <string>
#include <iostream>

using namespace std;

class Class{
private:
    string a;
public:
    void setA(string b){a = b;}
    string getA(){return a;}
};
class Container{
private:
    int n, current;
    Class *C;
public:
    Container(): C(NULL), n(0), current(0){}
    void toFirst() {current = 0;}
    void toNext() {if(current < n)current++;}
    bool notLast() {return current < n;}
    void expandC(int ammount){
      Class *NewClass= new Class[ammount];
      for (int i = 0; i < n; i++)
        NewClass[i] = C[i];
        delete []C;
        C = NewClass;
        n = ammount;
    }

    void addC(string name){
      expandC(n+1);
      C[n-1].setA(name);
      current = n;
    }
    void setC(string name){
        if(current+1<=n){
            C[current].setA(name);
        }else{
            addC(name);
        }

    }
    string getName  ()  { return C[current].getA(); }
};

void main(){
  Container *CONT;
  CONT = new Container;
  CONT->expandC(10);
  CONT->toFirst();
  while(CONT->notLast()){
      CONT->setC("value");
      CONT->toNext();
  }

  CONT->toFirst();
  while(CONT->notLast()){
      cout << CONT->getName()<<endl;
      CONT->toNext();
  }
system("Pause");
}