DEFAULT1

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/* Write  a  program to implement default argument as a function to find
out the area of the circle  */
#include<iostream.h>
#include<conio.h>
class shape
 {
   int a;
   float p;
   public:
     void getdata(int, float pi=3.14);
     void show()
      {
        float ans;
        ans = a * (p * p);
        cout<<"Area of the circle : "<<ans;
      }
 };
 void shape::getdata(int n,float pi)
  {
    p = pi;
    a = n;
  }


void main()
 {
    int a;
    shape circle;
    clrscr();
    cout<<"Enter the value of Radius : ";
    cin>>a;
    circle.getdata(a);
    circle.show();
    getch();
 }