Untitled

#include<iostream>
using namespace std;/*
class nest  {
int a;
int square_num() {
return a*a;
}

public:
    void input_num() {
    cout<<"Enter a number: "<<endl;
    cin>>a;
    }

    int cube_num() {
    return a*a*a;
    }
    void disp_num() {
    int sq=square_num();
    int cu=cube_num();
    cout<<"The square of " <<a<<" is " <<sq<<endl;
    cout<<"The cube of "<<a<<" is "<<cu;
    }
};


int main() {
nest n1;
n1.input_num();
n1.disp_num();
return 0;*/

/*
class rectangle
{
private:
    int length, breadth;

public:
    void setdata(int l, int b)
    {
        length=l;
        breadth=b;
    }

    void showdata(){
        cout<<"Length="<<length<<endl
             <<"Breadth="<<breadth<<endl;
    }

    int findarea()
    {
        return length*breadth;
    }

    int findperimeter(){
        return 2*(length+breadth);
    }
};

int main(){
    rectangle r;
    r.setdata(4,2);
    r.showdata();
    cout<<"Area="<<r.findarea()<<endl;
    cout<<"Perimeter="<<r.findperimeter()<<endl;
    return 0;*/

/*
    class rectangle{
private:
    int length,breadth;
    static int count;
public:
    void setdata(int l,int b)
    {

        length=l;
        breadth=b;
        count++;
        }
    static void displaycount(){
    cout<<count<<endl;
    }
    };

int rectangle::count;
    int main()

    {

        rectangle r1,r2, r3;
        rectangle :: displaycount();


         r1.setdata(6,5);
         r2.setdata(8,4);
         r3.setdata(15,7);

        rectangle :: displaycount();

 return 0;
   */
/*
   class sample{
   private:
       int a;
       int b;

       friend float mean(sample s);
   public:
    void setvalue(){
    a=25;
    b=40;

    }

   };
   float mean(sample s){

   return float(s.a+s.b)/2;

    }
int main(){

sample x;
x.setvalue();
cout<<"mean value="<<mean(x);
return 0;




}*/