static void Main(string[] args)
{
int l, b, w, h;
Console.WriteLine("Enter length and breadth of a rectangle");
l = Convert.ToInt32(Console.ReadLine());
b = Convert.ToInt32(Console.ReadLine());
Rectangle r = new Rectangle(l, b);
r.display();
r.area();
Console.WriteLine("Enter base and height of a triangle");
w = Convert.ToInt32(Console.ReadLine());
h = Convert.ToInt32(Console.ReadLine());
Triangle t = new Triangle(w, h);
t.display();
t.area();
}
