Mathematics Class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication16.Model
{
static class Mathematics
{
public static float pi = 3.124f;
public static double areaofcircle(float r)
{
return pi * Math.Pow(r, 2);
}
public static double circumferencecircle(float r)
{
return 2 * pi * r;
}
}
}
Main class:
using ConsoleApplication16.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication16
{
class Program
{
static void Main(string[] args)
{
float r;
l1:
Console.WriteLine("Enter the radius of circle:");
r = float.Parse(Console.ReadLine());
if (r<0)
{
Console.ForegroundColor = System.ConsoleColor.Red;
Console.WriteLine("Radius cannot be negative.....");
Console.ForegroundColor=System.ConsoleColor.White;
}
else
{
Console.ForegroundColor = System.ConsoleColor.Green;
Console.WriteLine("Area of Circle is " + Mathematics.areaofcircle(r));
Console.ForegroundColor = System.ConsoleColor.Magenta;
Console.WriteLine("Circumference of Circle is " + Mathematics.circumferencecircle(r));
Console.ForegroundColor = System.ConsoleColor.White;
}
Console.WriteLine("Press any key to continue....");
Console.ReadKey();
Console.Clear();
goto l1;
}
}
}
