#include<iostream>
using namespace std;

// Declare area functions for circle
// and rectangle
float area(float radius);
float area(float length, float width);


// Begin main function
int main()
{
 float radius, length,width;

 // Compute circle area
 cout << "Give a radius: ";
 cin >> radius;
 cout << "Area is: " << area(radius) << endl;


 // Compute rectangle area
 cout << "Give a length and width: ";
 cin >> length >> width;
 cout << "Area is: " << area(length,width) << endl;

 return 0;

}


// Pre-condition: one positive float input as radius
// Post-condition: output float area of circle with
//                 input radius
float area(float radius)
{
 return 3.14*radius*radius;
}


// Pre-condition: two positive floats input as length
//                and width
// Post-condition: output float area of rectangle with
//                 input length and width
float area(float length,float width)
{
 return length*width;
}