Program for area of a circle using class in C++

Program for area of a circle using class:

 #include<iostream>

using namespace std;

class circle

{

float r;

float area;

public:

void getdata()

{

cout<<"Enter the value: "<<endl;

cin>>r;

}

void showdata()

{

area=3.14*r*r;

cout<<"Area is: "<<area;

} 

};

int main()

{

circle c;

c.getdata();

c.showdata();

}

output:

Enter the value:

4

Area is: 50.24