Functions and object pro in c++

Friend Function

#include

#include

class sample

{

   int a,b;

   public :

     void setvlaue()

    {

       a = 25; b = 20;

     }

 friend float mean (sample s);

 };

float mean (sample s)

 {

  return float (s.a+s.b)/2.0;

 }

int main ()

{

  sample x;

  x.setvalue();

  cout << " Mean Value is =" << mean(x) <<"\n";

}

Objects as Function Arguments

#include

#include

class time

{

   int hours, minutes;

   public : 

   void gettime(int h, int m)

  {

  hours=h; minutes=m;

  }

  void puttime()

 {

  cout << "hours"<< hours;

  cout << "time" << time;

  }

  void sum(time,time);  

  };  

 void time :: sum(time t1,time t2)

{

  minutes = t1.minutes + t2.minutes;

  hours = minutes /60;   minutes = minutes%60;

  hours = hours + t1.hours +t2.hours;

 }

int main()

{

   time t1,t2,t3;

   t1.gettime(2,45);

   t2.gettime(3,30);

   t3.sum(t1,t2);

   cout << "t1 ="; t1.puttime();

   cout << " t2 = "; t2.puttime();

   cout << "t3 = " ; t3.puttime();

 }  

Code for Program that provides an example of function returning object in C++ Programming

# include 

# include 

class data

{

    int a,b;

    public:

        void get();

        friend data sum (data,data);

        void show();

};

data sum(data a1,data a2)

{

    data a3;

    a3.a=a1.a+a2.a;

    a3.b=a1.b+a2.b;

    return a3;

}

int main()

{

    clrscr();

    data a,b,c;

    a.get();

    b.get();

    c=sum(a,b);

    c.show();

}

void data::get()

{

    cout<<"Please enter for a:->";

    cin>>a;

    cout<<"Please enter for b:->";

    cin>>b;

}

void data::show()

{

    cout<<"A= "<

    cout<<"B= "<

}