C언어 동적메모리

void main()
{
        int a,b,c;

        cout<<"사각형의 갯수 : ";
        cin>>c;

        Rectangle *r=new Rectangle[c];

        for(int i=0;i<c;i++)
        {
                cout<<"가로 : ";
                cin>>a;
                cout<<"세로 : ";
                cin>>b;
                (r+i)->setRectangle(a,b);
                (r+i)->calcArea();
                (r+i)->print();
        }
                        delete r;
}