Returning Objects from Function

Returning Objects from Function:

    An function can return object to the calling function as it can return integer, float…. values. This can be explained as following example.

An Example:

#include<iostream.h>

class distance

  {

   private:

     int feet;

     float inches;

   public:

     void get_distance();

    distance add_distance(distance, distance);

     void display_distance();

  };

    void distance:: get_distance()

       {     cout<<"Enter Feet:\t";

              cin>>feet;

              cout<<"\nEnter Inches:\t";

              cin>>inches;       }

 void distance::display_distance()

      {     cout<<"The sum is:\t" ;

             cout<<feet<<"\'-"<<inches<<'\"';    }

distance distance::add_distance( distance d1, distance d2)

    {

     distance sum;

     sum.inches=d1.inches+d2.inches;

     if(sum.inches>=12)

            {

            sum.inches-=12;

            sum.feet=1;

            }

      sum.feet+=(d1.feet+d2.feet);

     return (sum);    //object return

     }

void main()

  {

   distance first, second, result;

   cout<<"\nEnter first distance\n";

   first.get_distance();

   cout<<"\nEnter second distance\n";

   second.get_distance();

   result=result.add_distance(first,second);

   result.display_distance();

     }

Output:

Enter first distance

Enter Feet:     3

Enter Inches:   9

Enter second distance

Enter Feet:     5

Enter Inches:   5

The sum is:     9'-2"

In this example, function add_distance() passes two objects as arguments and it returns value of type distance i.e. object of class distance. The returned object is stored in another object result in main() function.