// Helene Martin, CSE 142
// Calculates the hypotenuse of a triangle.
public class Triangle {
   public static void main(String[] args) {
      double hyp = round2(hypotenuse(4, 7));
      System.out.println("Hypotenuse of triangle with sides 4 and 7: " + hyp);
      
      System.out.println("Hypotenuse of triangle with sides 12 and 18: " +
      round2(hypotenuse(12, 18)));
      
      // NOTE: although the line of code below compiles, it doesn't do anything
      // because hypotenuse returns a value that we're not using in any way.
      // In general, you should never call a method that returns without doing
      // something with the returned value.
      hypotenuse(5, 6);
   }
   
   // Computes triangle hypotenuse length given its side lengths.
   public static double hypotenuse(int a, int b) {
      double c = Math.sqrt(a * a + b * b);
      return c;
   }

   // Rounds the given value to two digits after the decimal point.   
   public static double round2(double value) {
      // 46.3463332321 => 4635 => 46.35
      double result = Math.round(value * 100) / 100.0;
      return result;
   }
}