Program to find the area of the circle and area of cylinder

Code of the program:

#include<iostream>

using namespace std;

int main()  {

             float r,area;

             const float PI=3.14;

             cout<<"Enter number to find the area of the circle"<<endl;

             cin>>r;

             area = PI*(r*r);

             cout<<"area of the circle is: "<<area;

             return 0;

}

Output:

Code#2:

#include<iostream>

using namespace std;

int main()

{

             float r,area;

             const float PI=3.14;

             cout<<"Enter the value to calculate the area of the cylender"<<endl;

             cin>>r;

             area = 2*PI*r;

             cout<<"Area of cylender is = "<<area<<endl;

}

Output: