static void Main(string[] args)
{
Console.WriteLine("1-Rectangle\n2-Triangle\n3-Circle");
Console.WriteLine("Enter Choice: ");
int choice = Convert.ToInt16(Console.ReadLine());
if (choice == 1)
{
Console.WriteLine("RECTANGLE CLASS");
Rectangle rt = new Rectangle();
Console.WriteLine("Enter Length: ");
rt.length = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Enter Breadth: ");
rt.breadth = Convert.ToDouble(Console.ReadLine());
double rtArea = rt.calcArea();
Console.WriteLine("Area of Rectangle is: " + rtArea);
}
else if (choice == 2)
{
Console.WriteLine("TRIANGLE CLASS");
Triangle t = new Triangle();
Console.WriteLine("Enter Length1 : ");
t.l1 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Enter Length2 : ");
t.l2 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Enter Length3 : ");
t.l3 = Convert.ToDouble(Console.ReadLine());
double tArea = t.getArea();
Console.WriteLine("Area of Triangle is : " + tArea);
}
else if (choice == 3)
{
Console.WriteLine("CIRCLE CLASS");
Circle circle = new Circle();
Console.WriteLine("Enter Radius: ");
circle.radius = Convert.ToDouble(Console.ReadLine());
double AreaCircle = circle.getArea();
Console.WriteLine("Area of Circle is : " + AreaCircle);
}
else
{
Console.WriteLine("You Entered Wrong Choice!!");
}
}