C#: Enter the three numbers. Check to see that there is 3 sides of a triangle are not. If that is right, then see what kind of triangle.

//Enter the number 3. Check to see that there is 3 sides of a triangle are not. If that is right, then see what kind of triangle.
Source code:

class Program{

        static void Main() {

            float x, y, z;

            Console.Write("Input x: ");

            x = float.Parse(Console.ReadLine());

            Console.Write("Input y: ");

            y = float.Parse(Console.ReadLine());

            Console.Write("Input z: ");

            z = float.Parse(Console.ReadLine());

            if (x <= 0 || y <= 0 || z <= 0 || x + y <= z || y + z <= x || x + z <= y)

                Console.WriteLine("Input wrong !");

            else {

                if ((x == y && x * x * 2 == z * z) || (x == z && x * x * 2 == y * y) || (y == z && y * y * 2 == x * x))

                    Console.WriteLine("Triangle Square Scales");

                else {

                    if (x == y && y == z && z == x)

                        Console.WriteLine("Equilateral triangle");

                    else {

                        if (x == y || y == z || z == x)

                            Console.WriteLine("Isosceles triangle");

                        else

                            Console.WriteLine("Triangle");

                    }

                }

            }

            Console.ReadLine();

        }

}