Write a C++ program which should represent the concept of bridging two classes

#include<iostream.h>
#include<stdio.h>
#include<conio.h>
class num2;
class num1
{
  private:
    int n;
  public:
    void getdata()
    {
      cout<<"\n"<<"Enter the no: ";
      cin>>n;
    }
    friend class num2;
};
class num2
{
  private:
    int n;
  public:
    void getdata()
    {
      cout<<"\n"<<"Enter the no: ";
      cin>>n;
    }
    void add(num1 n1)
    {
      n+=n1.n;
    }
    void show()
    {
      cout<<"Total sum is: "<<n;
    }
};
void main()
{
  num1 n1;
  num2 n2;
  clrscr();
  n1.getdata();
  n2.getdata();
  n2.add(n1);
  n2.show();
  getch();
}




OUTPUT
Enter the no:12
Enter the no:12

Total sum is:24