9) Create two classes DM and DB which store the value of distances. DM stores distances in metres and centimetres and DB in feet and inches. Write a program that can read values for the class objects and add one object of DM with another object of DB. (Use a friend function to carry out the addition operation. The object that stores the results may be a DM object or DB object, depending on the units in which the results are required.)

#include<iostream>

using namespace std;

class DB;

class DM

{

 float meter,centi;

 public:

 void getdata()

 {

  cout<<"\nEnter the distance in(meter-centimeter):";

  cin>>meter>>centi;

 }

 void display()

 {

  cout<<"\nThe distance is:";

  cout<<meter<<" meters and "<<centi<<" centimeter";

 }

 friend void add(DM &,DB &);

};

class DB

{

 float inch,feet;

 public:

 void getdata()

 {

  cout<<"\nEnter the distance in(feet-inch):";

  cin>>feet>>inch;

 }

 void display()

 {

  cout<<"\nThe distance is:";

  cout<<feet<<" feet and "<<inch<<" inch";

 }

 friend void add(DM &,DB &);

};

void add(DM &a,DB &b)

{

 int ch;

 cout<<"\nPress 1 for meter-centi:";

 cout<<"\nPress 2 for feet-inch:";

 cout<<"\nEnter your choice:";

 cin>>ch;

 if(ch==1)

 {

  DM d;

  int c=(a.meter*100+a.centi+b.feet*30.48+b.inch*2.54);

  if(c>=100)

  {

   d.meter=c/100;

   d.centi=c%100;

  }

  else

  {

   d.meter=0;

   d.centi=c;

  }

  d.display();

 }

 else

 {

  DB d;

  int i=(a.meter*39.37+a.centi*.3937008+b.feet*12+b.inch);

  if(i>=12)

  {

   d.feet=i/12;

   d.inch=i%12;

  }

  else

  {

   d.feet=0;

   d.inch=i;

  }

  d.display();

 }

}

int main()

{

 

 DM a;

 DB b;

 a.getdata();

 b.getdata();

 add(a,b);

 

}