Question

Write a C# source code. Write a function called CircArea() that finds the area of a circle. It should take an argument of type double and return an argument of the same type. Write a Main() method that gets a radius value from the user, calls CircArea(), and displays the result.

Answer 1

using System;

namespace Area {
   class NumberManipulator {
      public double CircArea(double radius) {
         double PI = 3.14;
         Area =  PI * radius*radius; 
         return  Area;
      }
      
      static void Main(string[] args) {
         Console.WriteLine("Input the radius of the circle : ");
         r =  Convert.ToDouble(Console.ReadLine());
         int ret;
         NumberManipulator n = new NumberManipulator();

         //calling the CircArea method
         ret = n.CircArea(r);
         Console.WriteLine("Area is : {0}", ret );
      }
   }
}

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