Operator Overloading ( == )

Practical-16

Define a circle class with radius as data member, Add necessary constructors and member function to compute area of circle. Class should overload the = = operator to compare two circle objects whether they are equal in radius. Demonstrate its use in main().

#include<iostream>
#include<math.h>
using namespace std;
class circle
{
  int radius;
  float area;
  public:
  circle(int);
  void display();
 int operator==(circle c1);
 };
int circle::operator==(circle c1)
{
  if(radius==c1.radius)
  return 1;
  else
  return 0;
}
circle::circle(int radius)
{
cout<<"radius="<<radius<<endl;
      area=M_PI*(radius*radius);
}
void circle :: display()
{

  cout<<"area="<<area<<endl;
}
int main()
{
  circle c1(2);
  c1.display();
  circle c2(2);
  c2.display();
     int x;
     x=(c1==c2);
      if(x==1)
          cout<<"they are equal in radius";
      else
          cout<<"not equal";
  return 0;
}