/*
  5.Week Exercise 14: Triangles
  Author: Lasse Lerkenfeld Jensen
*/

import cs1.Keyboard;

public class Triangles
{
  public static void main(String[] s)
  {
    //Input the length of the sides (a,b,c) in a triangle
    System.out.println("Input the length of the sides of a triangle: ");
    System.out.print("Length of side a:"); int a = Keyboard.readInt();
    System.out.print("Length of side b:"); int b = Keyboard.readInt();
    System.out.print("Length of side c:"); int c = Keyboard.readInt();

    //Sort a, b and c so that: a <= b <=c
    int temp;
    if (a > b)
    {
      temp = a;
      a = b;
      b = temp;
    }
    if (c < a)
    {
      temp = c;
      c = b;
      b = a;
      a = temp;
    }
    else if (c < b)
    {
      temp = c;
      c = b;
      b = temp;
    }

    //Determine and print the type of the triangle
    if (a <= 0 || a+b <= c)
      System.out.println("This is not a triangle.");
    else if (a == c)
      System.out.println("This triangle is equilateral.");
    else if (a == b || b == c)
      System.out.println("This triangle is isosceles.");
    else
      System.out.println("This triangle is scalene.");
  }
}