Question

write a method named area with one double parameter named radius. The method needs to return a double value that represents the area of a circle. If the parameter radius is negative, Then return -1.0 to represent an invalid value

write another overloaded method with 2 parameters side1 and side2 (both doubles) where side1 and side2 represent the sides of a rectangle. The method needs to return an area of a rectangle. If either or both parameters is /are a negative return -1.0 to indicate an invalid value

Answer 1

#include<iostream>
using namespace std;
double area(double);
double area(double,double);

int main()
{
  double circle = area(10.0);
  cout<<"Area of circle is " << circle<<endl;
  double rectangle = area(5.0,7.0);
  cout<<"Area of rectangle is "<<rectangle<<endl;
  return 0;
}

double area(double radius)
{
  if (radius<0)
     return -1.0;
  else
     return 3.14*radius*radius;
}

double area(double side1,double side2)
{
  if (side1<0 || side2<0)
     return -1;
  else
    return side1*side2;
}